Applied Optics via MedWorm.com MedWorm.com provides a medical RSS filtering service. Over 6000 RSS medical sources are combined and output via different filters. This feed contains the latest items from the 'Applied Optics' source. Mon, 06 Feb 2012 20:24:44 +0100 Ultrafast laser-induced microstructure/nanostructure replication and optical properties http://www.medworm.com/index.php?rid=5664507&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-604 This paper demonstrates replication of ultrafast laser-induced micro/nano surface textures on poly(dimethylsiloxane) (PDMS). The surface texture replication process reduces the processing steps for microtexturing while improving light trapping. Two methods are demonstrated to replicate surface ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5664507 Tue, 07 Feb 2012 01:06:10 +0100 5664507 Performance improvement in a directly 879 nm dual-end-π-polarized-pumped CW and pulsed GdVO_4/Nd:GdVO_4 laser http://www.medworm.com/index.php?rid=5664506&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-600 A continuous-wave and Q-switched 10 kHz GdVO_4/Nd:GdVO_4 laser by 879 nm laser-diode pumping was demonstrated. We combined dual-end-π-polarized-pumping, half-wave plate (HWP) insertion, composite laser crystals, and dual Q-switching techniques to obtain a 1.06 μm nanosecond laser with ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5664506 Tue, 07 Feb 2012 01:06:10 +0100 5664506 Wavelength dispersion measurement of electro-optic coefficients in the range of 520 to 930 nm in rubidium titanyl phosphate using spectral interferometry http://www.medworm.com/index.php?rid=5664505&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-594 We present here the EO ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5664505 Tue, 07 Feb 2012 01:06:10 +0100 5664505 Self-consistent way to determine relative distortion of axial symmetric lens systems http://www.medworm.com/index.php?rid=5664504&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-588 We present a simple method to determine the relative distortion of axially symmetric lens systems. This method uses graphs to determine every parametric value instead of nonlinear minimization computation and is composed of an LCD screen to display a square grid pattern of pixel-wide spots and a ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5664504 Tue, 07 Feb 2012 01:06:10 +0100 5664504 Application of S-transform profilometry in eliminating nonlinearity in fringe pattern http://www.medworm.com/index.php?rid=5664503&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-577 The S-transform, conceptually viewed as an extension of the short-time Fourier transform and the wavelet transform, features a time-frequency representation known for its local spectral property and multiresolution strategy. It has been introduced in optical three-dimensional shape measurement ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5664503 Tue, 07 Feb 2012 01:06:10 +0100 5664503 Design of an optofluidic biosensor using the slow-light effect in photonic crystal structures http://www.medworm.com/index.php?rid=5664502&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-568 The authors propose a biosensor architecture based on the selective infiltration of photonic crystal (PhC) structures. The proposed sensor consists of a ring cavity coupled to an optofluidic slow-light waveguide in a PhC platform. A high potential sensitivity of 293??nm/refractive index unit is ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5664502 Tue, 07 Feb 2012 01:06:10 +0100 5664502 Toward the optimization of double-pulse LIBS underwater: effects of experimental parameters on the reproducibility and dynamics of laser-induced cavitation bubble http://www.medworm.com/index.php?rid=5664501&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-7-B30 Double-pulse laser-induced breakdown spectroscopy (LIBS) was recently proposed for the analysis of underwater samples, since it overcomes the drawbacks of rapid plasma quenching and of large continuum emission, typical of single-pulse ablation. Despite the attractiveness of the method, this ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5664501 Tue, 07 Feb 2012 01:06:10 +0100 5664501 Analysis of sensing coil polarization properties’ effect on performance of fiber optical gyroscope http://www.medworm.com/index.php?rid=5664500&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-621 The mechanism of fiber coil polarization properties’ effect on the performance of a fiber optical gyroscope (FOG) is investigated with analysis of secondary wave trains’ polarization evolution and interference in the fiber coil. Based on the optical model, the simulation demonstrates ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5664500 Tue, 07 Feb 2012 01:06:10 +0100 5664500 Application of the Hough transform for the automatic determination of soot aggregate morphology http://www.medworm.com/index.php?rid=5664499&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-610 We report a new method for automated identification and measurement of primary particles within soot aggregates as well as the sizes of the aggregates and discuss its application to high-resolution transmission electron microscope (TEM) images of the aggregates. The image processing algorithm is ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5664499 Tue, 07 Feb 2012 01:06:10 +0100 5664499 Simultaneous wavenumber measurement and coherence detection using temporal phase unwrapping http://www.medworm.com/index.php?rid=5656899&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-558 We describe here a method based on recording interferograms of multiple wedges to provide simultaneously high wavenumber resolution and immunity to ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5656899 Sat, 04 Feb 2012 01:20:19 +0100 5656899 Quantitative carbon measurement in anthracite using laser-induced breakdown spectroscopy with binder http://www.medworm.com/index.php?rid=5656898&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-7-B22 Quantitative carbon measurement in anthracites remains difficult with laser-induced breakdown spectroscopy (LIBS) due to its relatively high measurement uncertainty. To improve the measurement repeatability, binders to bind the anthracite powder together were utilized for LIBS measurement. Results ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5656898 Sat, 04 Feb 2012 01:20:19 +0100 5656898 Instrumentation design for bridge scour monitoring using fiber Bragg grating sensors http://www.medworm.com/index.php?rid=5656902&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-547 Scour is one of the main causes of bridge failures. In order to measure and monitor scour depth variations including deposition (refilling) process, three designs for a scour monitoring system using fiber Bragg grating (FBG) sensors are discussed in the present study. By a comparative study, one of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5656902 Fri, 03 Feb 2012 05:00:00 +0100 5656902 Image degradation due to surface scatter in the presence of aberrations http://www.medworm.com/index.php?rid=5656901&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-535 Image analysis in the presence of surface scatter due to residual optical fabrication errors is often perceived to be complicated, nonintuitive, and achieved only by computationally intensive nonsequential ray tracing with commercial optical analysis codes such as ASAP, Zemax, Code V, TracePro, or ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5656901 Fri, 03 Feb 2012 05:00:00 +0100 5656901 High peak-power single-frequency pulses using multiple stage, large core phosphate fibers and preshaped pulses http://www.medworm.com/index.php?rid=5656900&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-531 We have developed a monolithic high power pulsed fiber laser in a master oscillator power amplifier (MOPA) configuration, which is capable of reaching 0.38 mJ pulse energy and 128 kW peak power for 3 ns pulses at ∼1550??nm while maintaining transform-limited linewidth. The fiber laser pulse ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5656900 Fri, 03 Feb 2012 05:00:00 +0100 5656900 Concept, modeling, and performance prediction of a low-cost, large deformable mirror http://www.medworm.com/index.php?rid=5656904&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-515 While it is attractive to integrate a deformable mirror (DM) for adaptive optics (AO) into the telescope itself rather than using relay optics within an instrument, the resulting large DM can be expensive, particularly for extremely large telescopes. A low-cost approach for building a large DM is ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5656904 Thu, 02 Feb 2012 05:00:00 +0100 5656904 Study of a novel and simple method of generating binary mask for microprism fabrication http://www.medworm.com/index.php?rid=5656903&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-5-525 A new and simple method for generating binary masks for fabrication of gray scale micro-optical elements is proposed and examined. In this technique the main idea is superimposing two or more gratings with slightly different pitches that depend on the considered gray tone level. This causes ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5656903 Thu, 02 Feb 2012 05:00:00 +0100 5656903 Prototype development and field-test results of an adaptive multiresolution PANOPTES imaging architecture http://www.medworm.com/index.php?rid=5635732&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-A48 The design, development, and field-test results of a visible-band, folded, multiresolution, adaptive computational imaging system based on the Processing Arrays of Nyquist-limited Observations to Produce a Thin Electro-optic Sensor (PANOPTES) concept is presented. The architectural layout that ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635732 Fri, 27 Jan 2012 05:00:00 +0100 5635732 Space-bandwidth scaling for wide field-of-view imaging http://www.medworm.com/index.php?rid=5635731&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-A36 We examine the space-bandwidth product of wide field-of-view imaging systems as the systems scale in size. Our analysis is based on one conducted to examine the behavior of a plano-convex lens imaging onto a flat focal geometry. We extend this to consider systems with monocentric lenses and curved ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635731 Fri, 27 Jan 2012 05:00:00 +0100 5635731 High-resolution multiband polarization epithelial tissue imaging method by sparse representation and fusion http://www.medworm.com/index.php?rid=5635730&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-A27 Multiband polarization epithelial tissue imaging is an effective tool to measure tissue’s birefringence and structure for quantitative pathology analysis. To discriminate the pathology accurately, high-resolution multiband polarization images are essential. But it is difficult to acquire ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635730 Fri, 27 Jan 2012 05:00:00 +0100 5635730 Flat field concave holographic grating with broad spectral region and moderately high resolution http://www.medworm.com/index.php?rid=5635729&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-509 In order to deal with the conflicts between broad spectral region and high resolution in compact spectrometers based on a flat field concave holographic grating and line array CCD, we present a simple and practical method to design a flat field concave holographic grating that is capable of imaging ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635729 Fri, 27 Jan 2012 05:00:00 +0100 5635729 Temporal coupled-mode theory of ring–bus–ring Mach–Zehnder interferometer http://www.medworm.com/index.php?rid=5635728&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-504 The temporal coupled-mode theory (TCMT) for a ring–bus–ring Mach–Zehnder interferometer device is developed by taking energy conservation into account. The intercavity interaction in the device is facilitated via a tricoupler, which makes the decay of modes quantitatively ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635728 Fri, 27 Jan 2012 05:00:00 +0100 5635728 Two-dimensional mapping of the electron density in laser-produced plasmas http://www.medworm.com/index.php?rid=5635727&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-498 We performed two-dimensional (2D) mapping of the electron density in a laser-produced plasma with high spatial and temporal resolution. The plasma was produced by irradiating an aluminum target with 1064 nm, 6 ns pulses from a Nd:YAG laser under vacuum conditions. Stark broadening of the lines was ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635727 Fri, 27 Jan 2012 05:00:00 +0100 5635727 Applications of the phase transfer function of digital incoherent imaging systems http://www.medworm.com/index.php?rid=5635726&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-A17 The phase of the optical transfer function is advocated as an important tool in the characterization of modern incoherent imaging systems. It is shown that knowledge of the phase transfer function (PTF) can benefit a diverse array of applications involving both traditional and computational imaging ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635726 Fri, 27 Jan 2012 05:00:00 +0100 5635726 Primary chromatic aberrations of a diffractive lens on finite substrate http://www.medworm.com/index.php?rid=5635725&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-494 In this report, we present an analysis for the primary chromatic aberrations of a diffractive lens on a spherically curved substrate having nonunity refractive index. This analysis facilitates achieving an optimal thin lens layout during structural design of the diffractive lens with prespecified ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635725 Fri, 27 Jan 2012 05:00:00 +0100 5635725 Determination of first-order derivative matrix of wavefront aberration with respect to system variables http://www.medworm.com/index.php?rid=5635724&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-486 The first-order derivative matrix of a function with respect to a variable vector is referred to as the Jacobian matrix in mathematics. Current commercial software packages for the analysis and design of optical systems use a finite difference (FD) approximation methodology to estimate the Jacobian ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635724 Fri, 27 Jan 2012 05:00:00 +0100 5635724 Talbot effect by a photorefractive volume phase grating http://www.medworm.com/index.php?rid=5635737&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-479 In our proposal a light intensity distribution generated by an incoherently illuminated planar amplitude grating is projected into a photorefractive crystal. This 3D distribution is mapped as an index refractive perturbation via the photorefractive effect thereby generating a volume phase grating. ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635737 Thu, 26 Jan 2012 05:00:00 +0100 5635737 Experimental implementation of the multifunctional compact two-photon state analyzer http://www.medworm.com/index.php?rid=5635736&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-474 We report on experimental implementation of a multifunctional two-photon state analyzer. The device aims to be compact and able to provide several important characteristics about any two-photon quantum state. It operates in two modes: first mode is the two-photon interference analysis giving the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635736 Thu, 26 Jan 2012 05:00:00 +0100 5635736 Multiband sensor using thick holographic gratings for sulfur detection by laser-induced breakdown spectroscopy http://www.medworm.com/index.php?rid=5635735&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-7-B7 Detection of sulfur by optical emission spectroscopy generally presents some difficulties because the strongest lines are in the vacuum UV below 185 nm and therefore are readily absorbed by oxygen molecules in air. A novel concept for a low-cost and efficient system to detect sulfur using near-IR ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635735 Thu, 26 Jan 2012 05:00:00 +0100 5635735 Laser-induced plasma chemistry of the explosive RDX with various metallic nanoparticles http://www.medworm.com/index.php?rid=5635734&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-7-B13 The feasibility of exploiting plasma chemistry to study the chemical reactions between metallic nanoparticles and molecular explosives such as cyclotrimethylenetrinitramine (RDX) has been demonstrated. This method, based on laser-induced breakdown spectroscopy, involves the production of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635734 Thu, 26 Jan 2012 05:00:00 +0100 5635734 Analysis of time-resolved superposed atomic hydrogen Balmer lines and molecular diatomic carbon spectra http://www.medworm.com/index.php?rid=5635733&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-7-B1 We present analysis of superposition spectra following laser-induced breakdown (LIB) of methane. Both hydrogen-beta and hydrogen-gamma lines contain discernible contributions from diatomic carbon emissions for time delays of 1 to 2 μs from pulsed, 8 ns, infrared Nd:YAG laser radiation LIB. ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5635733 Thu, 26 Jan 2012 05:00:00 +0100 5635733 Finite-difference time-domain analysis of time-resolved reflectance from an adult head model composed of multilayered slabs with a nonscattering layer http://www.medworm.com/index.php?rid=5625042&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-429 Finite-difference time-domain (FDTD) analysis has been used to predict the time-resolved reflectance from multilayered slabs with a nonscattering layer. Light propagation across the nonscattering layer was calculated based on the light intensity characteristics along a ray in free space. Additional ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5625042 Wed, 25 Jan 2012 02:27:00 +0100 5625042 Speckle orientation in paraxial optical systems http://www.medworm.com/index.php?rid=5625041&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-A1 The statistical properties of speckles in paraxial optical systems depend on the system parameters. In particular, the speckle orientation and the lateral dependence (x and y) of the longitudinal speckle size can vary significantly. For example, the off-axis longitudinal correlation length remains ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5625041 Wed, 25 Jan 2012 02:27:00 +0100 5625041 Time-average Fourier telescopy: a scheme for high-resolution imaging through horizontal-path turbulence http://www.medworm.com/index.php?rid=5625040&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-A11 The problem of high-resolution imaging through long horizontal-path ground-level turbulence has gone unsolved since it was first addressed many decades ago. In this paper I describe a method that shows promise for diffraction-limited imaging through ground-level turbulence with large (meters) ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5625040 Wed, 25 Jan 2012 02:27:00 +0100 5625040 White-light interferometry on rough surfaces—measurement uncertainty caused by noise http://www.medworm.com/index.php?rid=5625039&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-465 White-light interferometry on rough surfaces is an optical method for the measurement of the geometrical form of objects. The longitudinal coordinate of the measured surface is obtained from the measured interferogram by means of an evaluation method. However, the longitudinal coordinate cannot be ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5625039 Wed, 25 Jan 2012 02:27:00 +0100 5625039 Three-dimensional shape measurement of aspheric mirrors with fringe reflection photogrammetry http://www.medworm.com/index.php?rid=5625038&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-457 Three-dimensional (3D) shape measurement of an aspheric mirror with fringe reflection photogrammetry involves three steps: correspondence matching, triangulation, and bundle adjustment. Correspondence matching is realized by absolute phase tracking and triangulation is computed by the intersection ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5625038 Wed, 25 Jan 2012 02:27:00 +0100 5625038 Modal decomposition technique for multimode fibers http://www.medworm.com/index.php?rid=5625037&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-450 We propose a new solution for modal decomposition in multimode fibers, based on a spectral and spatial imaging technique. The appearance of spurious modes in the spectral and spatial processing of the images at the output of the fiber under test when it has more than two modes is demonstrated ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5625037 Wed, 25 Jan 2012 02:27:00 +0100 5625037 End-to-end sensor simulation for spectral band selection and optimization with application to the Sentinel-2 mission http://www.medworm.com/index.php?rid=5625036&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-439 In this study, such a tool has been developed that enables the assessment of the optimum spectral resolution configuration of a sensor ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5625036 Wed, 25 Jan 2012 02:27:00 +0100 5625036 Optimization of nanotube electrode geometry in a liquid crystal media from wavefront aberrations http://www.medworm.com/index.php?rid=5625045&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-422 This paper presents experimental optimization of number and geometry of nanotube electrodes in a liquid crystal media from wavefront aberrations for realizing nanophotonic devices. The refractive-index gradient profiles from different nanotube geometries—arrays of one, three, four, and ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5625045 Tue, 24 Jan 2012 05:00:00 +0100 5625045 Quality-guided orientation unwrapping for fringe direction estimation http://www.medworm.com/index.php?rid=5625044&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-413 Fringe patterns produced by various optical interferometric techniques encode information such as shape, deformation, and refractive index. Denoising and demodulation are two important procedures to retrieve information from a single closed fringe pattern. Various existing denoising and ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5625044 Tue, 24 Jan 2012 05:00:00 +0100 5625044 Optical penetration-based silkworm pupa gender sensor structure http://www.medworm.com/index.php?rid=5625043&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-4-408 This paper proposes and experimentally demonstrates for what is believed to be the first time a highly sought-after optical structure for highly-accurate identification of the silkworm pupa gender. The key idea is to exploit a long wavelength optical beam in the red or near infrared spectrum that ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5625043 Tue, 24 Jan 2012 05:00:00 +0100 5625043 Shape correction of optical surfaces using plasma chemical vaporization machining with a hemispherical tip electrode http://www.medworm.com/index.php?rid=5617305&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-401 We propose a plasma chemical vaporization machining device with a hemispherical tip electrode for optical fabrication. Radio-frequency plasma is generated close to the electrode under atmospheric conditions, and a workpiece is scanned relative to the stationary electrode under three-axis motion ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5617305 Fri, 20 Jan 2012 05:00:00 +0100 5617305 Telescope alignment from sparsely sampled wavefront measurements over pupil subapertures http://www.medworm.com/index.php?rid=5617304&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-394 We present a simple formalism that has proven useful in on-axis alignment of two-element telescopes when wavefront information is available from only a limited region (here two noncontiguous subapertures) of the pupil. Misalignments cause predictable full-aperture aberrations, which in turn cause ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5617304 Fri, 20 Jan 2012 05:00:00 +0100 5617304 Effective way of reducing coupling loss between rectangular microwaveguide and fiber http://www.medworm.com/index.php?rid=5617303&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-390 We introduce an anamorphic photonic crystal fiber (PCF) produced by postprocessing techniques to improve the coupling loss between a conventional single-mode fiber and rectangular microwaveguide. One end of the round core is connected with the conventional fiber, and the other end of the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5617303 Fri, 20 Jan 2012 05:00:00 +0100 5617303 Optimizing the identification of mono- and bilayer graphene on multilayer substrates http://www.medworm.com/index.php?rid=5617302&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-385 This work presents an investigation and optimization of the identification of graphene mono- and bilayers on various multilayer substrates. Instead of the mere contrast between substrate and substrate/mono/bilayer systems, weighted color differences are used to obtain optimum visibility. Our ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5617302 Fri, 20 Jan 2012 05:00:00 +0100 5617302 Iterative phase retrieval strategy of transient events http://www.medworm.com/index.php?rid=5617301&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-378 Important nuances of a process or processes in action can be obtained from the phase retrieval of diffraction patterns for analysis of transient events. A significant limitation associated with the iterative approach is that predictive input functions are needed and can result in situations of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5617301 Fri, 20 Jan 2012 05:00:00 +0100 5617301 Analysis of molecular dynamics of colloidal particles in transported dilute samples by self-mixing laser Doppler velocimetry http://www.medworm.com/index.php?rid=5617300&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-370 Colloidal particles in a liquid medium are transported with constant velocity, and dynamic light scattering experiments are performed on the samples by self-mixing laser Doppler velocimetry. The power spectrum of the modulated wave induced by the motion of the colloidal particles cannot be ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5617300 Fri, 20 Jan 2012 05:00:00 +0100 5617300 Delta-doped electron-multiplied CCD with absolute quantum efficiency over 50% in the near to far ultraviolet range for single photon counting applications http://www.medworm.com/index.php?rid=5617299&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-365 We have used molecular beam epitaxy (MBE) based delta-doping technology to demonstrate nearly 100% internal quantum efficiency (QE) on silicon electron-multiplied charge-coupled devices (EMCCDs) for single photon counting detection applications. We used atomic layer deposition (ALD) for ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5617299 Fri, 20 Jan 2012 05:00:00 +0100 5617299 Laser coarse–fine coupling scanning method by steering double prisms http://www.medworm.com/index.php?rid=5617298&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-356 Recent developments in optical communication systems have presented an emerging need for scanning and tracking dynamic targets with high accuracy. Unfortunately, conventional scanners have difficulty supplying either sufficient vision information or high scanning resolution because of the fixed ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5617298 Fri, 20 Jan 2012 05:00:00 +0100 5617298 Performance comparison of Raman/erbium-doped-fiber hybrid-amplification-based long-distance fiber Bragg grating sensor systems http://www.medworm.com/index.php?rid=5617307&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-348 A study regarding the performance comparison of three different types of long-distance fiber Bragg grating (FBG) sensors based on bidirectional Raman and erbium-doped fiber (EDF) amplification has been carried out to determine the most power-efficient and accurate configuration. The three sensor ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5617307 Wed, 18 Jan 2012 05:00:00 +0100 5617307 Noise-suppressed image enhancement using multiscale top-hat selection transform through region extraction http://www.medworm.com/index.php?rid=5617306&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-338 Enhancing an image through increasing the contrast of the image is one effective way of image enhancement. To well enhance an image and suppress the produced noises in the resulting image, a multiscale top-hat selection transform-based algorithm through extracting bright and dark image regions and ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5617306 Wed, 18 Jan 2012 05:00:00 +0100 5617306 Statistical analysis for windowed Fourier ridge algorithm in fringe pattern analysis http://www.medworm.com/index.php?rid=5604310&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-328 Based on the windowed Fourier transform, the windowed Fourier ridges (WFR) algorithm and the windowed Fourier filtering algorithm (WFF) have been developed and proven effective for fringe pattern analysis. The WFR algorithm is able to estimate local frequency and phase by assuming the phase ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5604310 Wed, 18 Jan 2012 05:00:00 +0100 5604310 Compact high-power, TEM_00 acousto-optics Q-switched Nd:YVO_4 oscillator pumped at 888 nm http://www.medworm.com/index.php?rid=5604309&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-323 A compact, high-power, high-repetition-rate Q-switched laser oscillator is presented in this paper. Adopting the acousto-optics Q-switching mechanism, the maximum output power of 57?W of 1064?nm fundamental wave at 200?kHz is obtained under 110?W888?nm pumping. The stable working range extends from ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5604309 Wed, 18 Jan 2012 05:00:00 +0100 5604309 Millimeter-wave center of curvature test for a fast paraboloid http://www.medworm.com/index.php?rid=5593582&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-316 We describe a technique for measuring the surface profile of a radio telescope with a fast paraboloidal primary. The technique uses a sensor, at the center of curvature of the primary, consisting of a millimeter-wave source and an array of receivers to measure the field in the caustic. The sensor ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5593582 Mon, 16 Jan 2012 03:34:06 +0100 5593582 Gauss-Legendre quadrature method used to evaluate the spatio-temporal intensity of ultrashort pulses in the focal region of lenses http://www.medworm.com/index.php?rid=5593581&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-306 We analyze the spatio-temporal intensity of sub-20 femtosecond pulses with a carrier wavelength of 810 nm along the optical axis of low numerical aperture achromatic and apochromatic doublets designed in the IR region by using the scalar diffraction theory. The diffraction integral is solved by ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5593581 Mon, 16 Jan 2012 03:34:06 +0100 5593581 Fabrication of two-dimensional superposed microstructure by interference lithography http://www.medworm.com/index.php?rid=5593580&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-302 In this paper, we report the basic theory and method of single exposure interference lithography (IL) to fabricate two-dimensional (2D) superposed microstructures. Distribution of six-beam interference intensities with different azimuth angle is discussed, and 2D superposed microstructures with ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5593580 Mon, 16 Jan 2012 03:34:06 +0100 5593580 Segmented mirror phasing using the focal-plane intensity http://www.medworm.com/index.php?rid=5593583&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-295 We develop a method for subaperture piston phase retrieval in a telescope using a segmented primary mirror. We assume that the mirror subapertures are arranged on a two-dimensional lattice, and in addition, the separate subaperture point-spread functions are focused and overlapped on the focal ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5593583 Fri, 13 Jan 2012 05:00:00 +0100 5593583 Q-switched fiber lasers with carbon nanotubes hosted in ceramics http://www.medworm.com/index.php?rid=5593584&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-3-290 Q-switched fiber ring lasers operated by single-walled carbon nanotubes (SWNTs) hosted in SiO_2 matrix are demonstrated by highlighting their stable operation and dramatically improved thermal damage threshold. Employing aerosol deposition process, SWNTs are incorporated into the ceramic host at ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5593584 Wed, 11 Jan 2012 05:00:00 +0100 5593584 Flying triangulation—an optical 3D sensor for the motion-robust acquisition of complex objects http://www.medworm.com/index.php?rid=5576991&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-281 Three-dimensional (3D) shape acquisition is difficult if an all-around measurement of an object is desired or if a relative motion between object and sensor is unavoidable. An optical sensor principle is presented—we call it “flying triangulation”—that enables a ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5576991 Mon, 09 Jan 2012 05:00:00 +0100 5576991 Imaging ellipsometry based method and algorithm for the analysis of fiber–fiber bonds in a paper network http://www.medworm.com/index.php?rid=5576990&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-273 The measurement of the bonded area of pulp fibers has been an unsolved issue in paper science for more than 40 years. By the use of an established pulp fiber model, and a 4×4 transfer matrix formalism we simulated the optical behavior of pulp fibers in a modified imaging ellipsometer, and we ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5576990 Mon, 09 Jan 2012 05:00:00 +0100 5576990 Adjustable active optical low-pass filter http://www.medworm.com/index.php?rid=5576989&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-268 This paper presents an active optical low-pass filter (AOLPF) capable of changing the resolution of an imaging system on demand in order to remove aliasing noise from a sampling image. This is advantageous over conventional optical low-pass filters, which are fixed image-blurring optical components ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5576989 Mon, 09 Jan 2012 05:00:00 +0100 5576989 Integrated gray-level gradient method applied for the extraction of three-dimensional velocity fields of sprays in in-line digital holography http://www.medworm.com/index.php?rid=5576988&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-255 In this study, an integrated gray-level gradient method is applied to extract the three-dimensional (3D) velocity fields of sprays. This method consists of a conventional edge-sharpness method and a new method, namely, the overall-sharpness method, which is an efficient supplement of the former. ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5576988 Mon, 09 Jan 2012 05:00:00 +0100 5576988 Optical characterization and reverse engineering based on multiangle spectroscopy http://www.medworm.com/index.php?rid=5576987&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-245 We perform characterization of thin films and reverse engineering of multilayer coatings on the basis of multiangle spectral photometric data provided by a new advanced spectrophotometer accessory. Experimental samples of single thin films and multilayer coatings are produced by magnetron ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5576987 Mon, 09 Jan 2012 05:00:00 +0100 5576987 Full-field characterization of a twisted nematic liquid-crystal device using equivalence theorem of a unitary optical system http://www.medworm.com/index.php?rid=5576986&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-238 Based on the equivalence theorem of a unitary optical system, we proposed an analytical approach to characterize the cell parameters of a twisted nematic liquid-crystal device (TNLCD) with full-field resolution. The spatial distribution of three characteristic parameters of a TNLCD was measured by ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5576986 Mon, 09 Jan 2012 05:00:00 +0100 5576986 Assessment of a bidirectional reflectance distribution correction of above-water and satellite water-leaving radiance in coastal waters http://www.medworm.com/index.php?rid=5576985&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-220 Water-leaving radiances, retrieved from in situ or satellite measurements, need to be corrected for the bidirectional properties of the measured light in order to standardize the data and make them comparable with each other. The current operational algorithm for the correction of bidirectional ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5576985 Mon, 09 Jan 2012 05:00:00 +0100 5576985 Pulse shaping fiber laser at 1.5 μm http://www.medworm.com/index.php?rid=5576984&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-214 In this paper we present, for the first time to our knowledge, a new pulse shaping technology (modulation schemes for seed laser) used to mitigate pulse narrowing effect and SBS effect in a high energy Er:Yb codoped fiber master oscillator power amplifier system at 1.5 μm to obtain longer ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5576984 Mon, 09 Jan 2012 05:00:00 +0100 5576984 Characterization of magnetization-induced second harmonic generation in iron oxide polymer nanocomposites http://www.medworm.com/index.php?rid=5576983&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-209 We have measured the magnetization-induced second harmonic generation (MSHG) of a nanocomposite consisting of iron oxide nanoparticles in a polymer film. The existing theoretical framework is extended to include DC magnetic fields in order to characterize the MSHG signal and analyze the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5576983 Mon, 09 Jan 2012 05:00:00 +0100 5576983 Spectral superresolution with ultrashort optical pulses http://www.medworm.com/index.php?rid=5569230&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-181 A superresolution technique for the measurement of transmission, reflection, and absorption spectra is proposed. An ultrashort laser pulse is propagated in a dispersive element and then periodically phase modulated. The temporal modulation is transformed into periodic spectral modulation, for which ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5569230 Sat, 07 Jan 2012 07:46:34 +0100 5569230 Simulative method for the optical processor reconfiguration on a dynamically reconfigurable optical platform http://www.medworm.com/index.php?rid=5569229&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-167 With the reconfiguration technique, users can configure the optical processor of a new optical computing platform, the ternary optical computer (TOC), into 42 specific basic operation units, and reconfigure it when the computation is completed. A simulative method of software for this technique is ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5569229 Sat, 07 Jan 2012 07:46:34 +0100 5569229 Using a Mach–Zehnder-interference-based passive configuration to eliminate the polarization noise in Brillouin optical time domain reflectometry http://www.medworm.com/index.php?rid=5569228&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-176 We propose a passive polarization depolarizer to overcome the polarization noise in Brillouin optical time domain reflectometry (BOTDR). We also give a theoretical analysis of the depolarizer. The depolarizer is highly stable and has small insertion loss. It is based on a Mach–Zehnder ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5569228 Sat, 07 Jan 2012 07:46:34 +0100 5569228 Laser-based air data system for aircraft control using Raman and elastic backscatter for the measurement of temperature, density, pressure, moisture, and particle backscatter coefficient http://www.medworm.com/index.php?rid=5569227&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-148 Flight safety in all weather conditions demands exact and reliable determination of flight-critical air parameters. Air speed, temperature, density, and pressure are essential for aircraft control. Conventional air data systems can be impacted by probe failure caused by mechanical damage from hail, ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5569227 Sat, 07 Jan 2012 07:46:33 +0100 5569227 Properties of a variable-delay polarization modulator http://www.medworm.com/index.php?rid=5569226&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-197 We investigate the polarization modulation properties of a variable-delay polarization modulator (VPM). The VPM modulates polarization via a variable separation between a polarizing grid and a parallel mirror. We find that in the limit where the wavelength is much larger than the diameter of the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5569226 Sat, 07 Jan 2012 07:46:33 +0100 5569226 Dual-wavelength slightly off-axis digital holographic microscopy http://www.medworm.com/index.php?rid=5569225&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-191 We propose dual-wavelength digital holographic microscopy with a slightly off-axis configuration. The axial measurement range without phase ambiguity is extended to the micrometer range by synthesizing a beat wavelength between the two wavelengths with separation of 157 nm. Real-time measurement of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5569225 Sat, 07 Jan 2012 07:46:33 +0100 5569225 Maximum-likelihood reconstruction of photon returns from simultaneous analog and photon-counting lidar measurements http://www.medworm.com/index.php?rid=5569231&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-139 We present a novel method for combining the analog and photon-counting measurements of lidar transient recorders into reconstructed photon returns. The method takes into account the statistical properties of the two measurement modes and estimates the most likely number of arriving photons and the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5569231 Fri, 06 Jan 2012 05:00:00 +0100 5569231 Photochromic dynamics of ophthalmic lenses http://www.medworm.com/index.php?rid=5569232&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-2-133 We describe and characterize a straightforward test setup for characterizing temporal and spectral dynamics of photochromic spectacle materials. Three measurement examples of contemporary silicate and organic photochromic spectacles are provided. The setup showed a good absolute accuracy of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5569232 Wed, 04 Jan 2012 05:00:00 +0100 5569232 Micro texturing of silicon using pulsed N_2-laser and formation mechanism http://www.medworm.com/index.php?rid=5542388&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-114 A low-cost pulsed N_2-laser has been used to successfully demonstrate the formation of self-organized conical microtexture in Si. The process is demonstrated in vacuum environment to avoid the use of SF_6 gas and sulfur incorporation. The microtexture is formed with an average structure height of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5542388 Fri, 23 Dec 2011 05:00:00 +0100 5542388 Joint optimization of phase diversity and adaptive optics: demonstration of potential http://www.medworm.com/index.php?rid=5542387&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-102 We study different possibilities to use adaptive optics (AO) and phase diversity (PD) together in a jointly optimized system. The potential of the joint system is demonstrated through numerical simulations. We find that the most significant benefits are obtained from the improved deconvolution of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5542387 Fri, 23 Dec 2011 05:00:00 +0100 5542387 Accurate calibration with highly distorted images http://www.medworm.com/index.php?rid=5533944&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-89 Camera calibration is a two-step process where first a linear algebraic approximation is followed by a nonlinear minimization. The nonlinear minimization adjusts the pin-hole and lens distortion models to the calibrating data. Since both models are coupled, nonlinear minimization can converge to a ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533944 Thu, 22 Dec 2011 05:00:00 +0100 5533944 Mode conversion in rectangular-core optical fibers http://www.medworm.com/index.php?rid=5533943&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-84 Mode conversion from the fundamental to a higher-order mode in a rectangular-core optical fiber is accomplished by applying pressure with the edge of a flat plate. Modal analysis of the near and far field images of the fiber’s transmitted beam determines the purity of the converted mode. ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533943 Thu, 22 Dec 2011 05:00:00 +0100 5533943 Simulation of the viewing properties and optical compensation of the biaxial nematic in-plane switching mode http://www.medworm.com/index.php?rid=5533942&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-75 Using Berreman 4×4 optical methods and continuum theory, we investigate the theoretical viewing properties of a potential homeotropically aligned biaxial nematic display switched with in-plane fields. We determine the isocontrast, isotransmission viewing characteristics for wide-angle viewing ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533942 Thu, 22 Dec 2011 05:00:00 +0100 5533942 Ultraslim fixed pattern projectors with inherent homogenization of illumination http://www.medworm.com/index.php?rid=5533941&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-64 For a given illumination source brightness, the transmitted flux of common single-aperture projection optics scales with all three system dimensions, thus preventing the realization of slim devices along with a high lumen output. In this article we introduce a multichannel approach, called ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533941 Thu, 22 Dec 2011 05:00:00 +0100 5533941 Beam displacement as a function of temperature and turbulence length scale at two different laser radiation wavelengths http://www.medworm.com/index.php?rid=5533940&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-55 Narrow laser beams directed from aircraft may at times pass through the exhaust plume of the engines and potentially degrade some of the laser beam characteristics. This paper reports on controlled studies of laser beam deviation arising from propagation through turbulent hot gases, in a ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533940 Thu, 22 Dec 2011 05:00:00 +0100 5533940 Implementation of edge-preserving regularization for frequency-domain diffuse optical tomography http://www.medworm.com/index.php?rid=5533939&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-43 In this study, we first propose the use of edge-preserving regularization in optimizing an ill-conditioned problem in the reconstruction procedure for diffuse optical tomography to prevent unwanted edge smoothing, which usually degrades the attributes of images for distinguishing tumors from ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533939 Thu, 22 Dec 2011 05:00:00 +0100 5533939 Regularized multiframe phase-shifting algorithm for three-dimensional profilometry http://www.medworm.com/index.php?rid=5533938&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-33 In many industrial inspection systems, it is required to have a high-precision three-dimensional measurement of an object under test. A popular technique is phase-measuring profilometry. In this paper, we develop some phase-shifting algorithms (PSAs). We propose a novel smoothness constraint in a ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533938 Thu, 22 Dec 2011 05:00:00 +0100 5533938 Antireflective subwavelength structures on microlens arrays—comparison of various manufacturing techniques http://www.medworm.com/index.php?rid=5533937&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-8 Antireflective subwavelength structures (ARS) resembling nanostructures found on the cornea of night-active insects reduce the reflection of light by providing a gradual change in the refractive index at the interface. These artificial ARS have mainly been fabricated by a combination of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533937 Thu, 22 Dec 2011 05:00:00 +0100 5533937 Tautochronism principle and grating dispersive delay lines http://www.medworm.com/index.php?rid=5533936&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-27 Dispersion delay lines (DDLs) are used for dispersion compensation in ultrafast optics. Note that the correct determination of the time delay of DDLs is based on the tautochronism principle: in an optical system consisting of refracting and reflecting elements the time delay between any two ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533936 Thu, 22 Dec 2011 05:00:00 +0100 5533936 All-optical flip-flop based on nonlinear effects in fiber Bragg gratings http://www.medworm.com/index.php?rid=5533935&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-21 We demonstrate a novel design for a passive all-optical R-S flip-flop with separate set-rest ports based on nonlinearity in the fiber Bragg gratings (FBGs). The spectrum of FBGs in the presence of the Kerr effect is investigated, and cw and transient characteristics of nonlinear-induced bistability ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533935 Thu, 22 Dec 2011 05:00:00 +0100 5533935 Single-frequency, high-power, continuous-wave fiber-laser-pumped Ti:sapphire laser http://www.medworm.com/index.php?rid=5533934&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-15 We demonstrate a high-power, continuous-wave (cw), single-frequency green source based on single-pass second-harmonic generation of a Yb-fiber laser in MgO:sPPLT as a viable pump source for a cw single-frequency Ti:sapphire ring laser. By careful design and optimization, the Ti:sapphire laser can ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533934 Thu, 22 Dec 2011 05:00:00 +0100 5533934 AgI-coated silver-clad stainless steel hollow waveguides for infrared lightwave transmission and their applications http://www.medworm.com/index.php?rid=5533933&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-51-1-1 We fabricated silver iodide (AgI)-coated silver hollow waveguides to transmit a wide range of infrared (IR) light. Silver-clad stainless steel pipes were used as a supporting pipe. Since this type of metallic hollow waveguide has high mechanical strength and heat resistance, it is suitable as a ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5533933 Thu, 22 Dec 2011 05:00:00 +0100 5533933 Coupled-wave analysis of vector holograms. 3. Effects of intrinsic distribution of optical axis in anisotropic media http://www.medworm.com/index.php?rid=5520770&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6717 We investigated theoretically the interference of two counterpropagating polarized light beams in optically anisotropic media whose optical axis is in the film plane and is gradually rotated around the thickness direction. Results indicated that pure polarization modulation without intensity ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5520770 Tue, 20 Dec 2011 05:00:00 +0100 5520770 Diode-pumped passively mode-locked Nd:YAG laser at 1338 nm with a semiconductor saturable absorber mirror http://www.medworm.com/index.php?rid=5520769&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6713 We demonstrate a diode-end-pumped passively mode-locked 1338 nm Nd:YAG laser with a semiconductor saturable absorber mirror. At the absorbed pump power of 8.89 W, an average output power of 1.12 W was obtained with a slope efficiency of 14%. The pulse width was 22.4 ps with a repetition rate of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5520769 Tue, 20 Dec 2011 05:00:00 +0100 5520769 Simultaneous measurements of multiple flow parameters for scramjet characterization using tunable diode-laser sensors http://www.medworm.com/index.php?rid=5520768&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6697 This paper reports the simultaneous measurements of multiple flow parameters in a scramjet facility operating at a nominal Mach number of 2.5 using a sensing system based on tunable diode-laser absorption spectroscopy (TDLAS). The TDLAS system measures velocity, temperature, and water vapor partial ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5520768 Tue, 20 Dec 2011 05:00:00 +0100 5520768 Line focusing for soft x-ray laser-plasma lasing http://www.medworm.com/index.php?rid=5520767&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6689 A computational study of line-focus generation was done using a self-written ray-tracing code and compared to experimental data. Two line-focusing geometries were compared, i.e., either exploiting the sagittal astigmatism of a tilted spherical mirror or using the spherical aberration of an ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5520767 Tue, 20 Dec 2011 05:00:00 +0100 5520767 Comparison of quarter-wave retarders over finite spectral and angular bandwidths for infrared polarimetric-imaging applications http://www.medworm.com/index.php?rid=5520766&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6682 We compare three technological approaches for quarter-wave retarders within the context of polarimetric-imaging applications in the long-wave infrared (LWIR) spectrum. Performance of a commercial cadmium sulfide (CdS) crystalline waveplate, a multilayer meanderline structure, and a silicon (Si) ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5520766 Tue, 20 Dec 2011 05:00:00 +0100 5520766 Modulation depth of Michelson interferometer with Gaussian beam http://www.medworm.com/index.php?rid=5512813&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6671 Mirror misalignment or the tilt angle of the Michelson interferometer can be estimated from the modulation depth measured with collimated monochromatic light. The intensity of the light beam is usually assumed to be uniform, but, for example, with gas lasers it generally has a Gaussian ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5512813 Sat, 17 Dec 2011 13:50:44 +0100 5512813 All-fiber tunable bandpass filter based on cascaded twin-core fiber http://www.medworm.com/index.php?rid=5512816&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6667 An all-fiber tunable bandpass filter (TBPF) based on cascaded twin-core fiber (TCF) is theoretically analyzed and experimentally demonstrated. The spectrum of this proposed TBPF can be easily adjusted by bending, twisting, stretching, or changing the length of TCF to achieve the required filter ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5512816 Fri, 16 Dec 2011 05:00:00 +0100 5512816 Optical properties of three-dimensional woodpile photonic crystals composed of circular cylinders with planar defect structures http://www.medworm.com/index.php?rid=5512815&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6657 The optical properties of three-dimensional woodpile photonic crystals (PhCs) composed of circular cylinder rods with a planar defect structure at the central layer are theoretically investigated using the parallel finite-difference time-domain method and plane-wave expansion method. Three types of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5512815 Fri, 16 Dec 2011 05:00:00 +0100 5512815 Geometrically enhanced morphology-dependent resonances of a dielectric sphere http://www.medworm.com/index.php?rid=5512814&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6652 The effect that geometrical resonances of orbiting internally reflecting rays have on the morphology-dependent resonances of microspheres is investigated heuristically and numerically using generalized Lorenz–Mie theory. Angularly resolved off-axis Gaussian beam elastic scattering spectra ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5512814 Fri, 16 Dec 2011 05:00:00 +0100 5512814 Security enhancement of a phase-truncation based image encryption algorithm http://www.medworm.com/index.php?rid=5501407&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6645 The asymmetric cryptosystem, which is based on phase-truncated Fourier transforms (PTFTs), can break the linearity of conventional systems. However, it has been proven to be vulnerable to a specific attack based on iterative Fourier transforms when the two random phase masks are used as public keys ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5501407 Wed, 14 Dec 2011 15:16:47 +0100 5501407 External occulter laboratory demonstrator for the forthcoming formation flying coronagraphs http://www.medworm.com/index.php?rid=5501406&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6632 The design and optimization of the external occulter geometry is one of the most discussed topics among solar coronagraph designers. To improve the performance of future coronagraphs and to stretch their inner fields of view toward the solar limb, the new concept of coronagraphs in formation flight ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5501406 Wed, 14 Dec 2011 15:16:47 +0100 5501406 Generation of high quality Airy beams with blazed micro-optical cubic phase plates http://www.medworm.com/index.php?rid=5501405&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6627 We design and fabricate a hybrid refractive–diffractive cubic phase plate (CPP) with a combined conventional blazed grating for generating high quality Airy beams. The grating enables elimination of direct incident illumination in the reconstructed beam. The CPP is fabricated in a negative ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5501405 Wed, 14 Dec 2011 15:16:47 +0100 5501405 Characterization of strong fiber Bragg gratings using an applied thermal chirp and iterative algorithm http://www.medworm.com/index.php?rid=5501404&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6617 Coupling coefficients of various grating types and strengths are calculated from measurements of the complex reflectivity using an applied thermal chirp and optical frequency domain reflectometry (OFDR). The complex reflectivity is then utilized by a layer peeling algorithm to determine the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5501404 Wed, 14 Dec 2011 15:16:47 +0100 5501404 Polarization invariants and retrieval of surface parameters using polarization measurements in remote sensing applications http://www.medworm.com/index.php?rid=5501403&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6606 Using polarization measurements in remote sensing and optical studies allows for the retrieval of more information. We consider the relationship between the reflection coefficients of plane and rough surfaces for linearly polarized waves. Certain polarization properties of reflected waves and ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5501403 Wed, 14 Dec 2011 15:16:47 +0100 5501403 Single-crystal sapphire tubes as economical probes for optical pyrometry in harsh environments http://www.medworm.com/index.php?rid=5501402&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6599 One-end-sealed single-crystal sapphire tubes are presented as a simple, robust, and economical alternative for bulky lightpipe probes. Thermal radiation from a blackbody cavity created at the inner surface of the sealed end is gathered by a simple lens-based collecting system and transmitted via ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5501402 Wed, 14 Dec 2011 15:16:47 +0100 5501402 Simple multiscale algorithm for layer detection with lidar http://www.medworm.com/index.php?rid=5501401&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6591 Lidar is a powerful active remote sensing device used in the detection of the optical properties of aerosols and clouds. However, there are difficulties in layer detection and classification. Many previous methods are too complex for large dataset analysis or limited to data with too high a ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5501401 Wed, 14 Dec 2011 15:16:47 +0100 5501401 Förster resonance energy transfer imaging in vivo with approximated radiative transfer equation http://www.medworm.com/index.php?rid=5501400&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6583 We describe a new light transport model, which was applied to three-dimensional lifetime imaging of Förster resonance energy transfer in mice in vivo. The model is an approximation to the radiative transfer equation and combines light diffusion and ray optics. This approximation is well ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5501400 Wed, 14 Dec 2011 15:16:47 +0100 5501400 Design of single-polarization wavelength splitter based on photonic crystal fiber http://www.medworm.com/index.php?rid=5501408&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6576 A new single-polarization wavelength splitter based on the photonic crystal fiber (PCF) has been proposed. The full-vector finite-element method (FEM) is applied to analyze the single-polarization single-mode guiding properties. Splitting of two different wavelengths is realized by adjusting the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5501408 Tue, 13 Dec 2011 05:00:00 +0100 5501408 Angle resolved color of bulk scattering media http://www.medworm.com/index.php?rid=5492798&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6555 The angle resolved reflectance factor of matte samples is measured with a goniophotometer and simulated using radiative transfer theory. Both measurements and simulations display the same characteristic dependence of the reflectance factor on the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5492798 Sun, 11 Dec 2011 15:11:50 +0100 5492798 Reconfiguration of spectral absorption features using a frequency-chirped laser pulse http://www.medworm.com/index.php?rid=5492797&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6548 A technique is proposed to manipulate atomic population in an inhomogeneously broadened medium, which can set an arbitrary absorption spectrum to a uniform transparency (erasure) or to a nearly complete inversion. These reconfigurations of atomic spectral distribution are achieved through ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5492797 Sun, 11 Dec 2011 15:11:50 +0100 5492797 Random-phase-shift Fizeau interferometer http://www.medworm.com/index.php?rid=5492796&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-36-6564 A new and potentially cost efficient kind of vibration-tolerant surface measurement interferometer based on the Fizeau-principle is demonstrated. The crucial novelty of this approach is the combination of two optoelectronic sensors: an image sensor with high spatial resolution and an arrangement of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5492796 Sun, 11 Dec 2011 15:11:50 +0100 5492796 Maskless multiple-beam laser lithography for large-area nanostructure/microstructure fabrication http://www.medworm.com/index.php?rid=5483634&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6536 This paper reports a maskless multiple-beam laser lithography technique for large-area nanostructure/microstructure fabrication. This lithography technique can flexibly generate arbitrary nanostructures/microstructures over a large area at a high speed. The feature size of the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5483634 Thu, 08 Dec 2011 14:33:55 +0100 5483634 Using a validated transmission model for the optimization of bundled fiber optic displacement sensors http://www.medworm.com/index.php?rid=5483633&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6526 A variety of intensity-modulated optical displacement sensor architectures have been proposed for use in noncontacting sensing applications, with one of the most widely implemented architectures being the bundled displacement sensor. To the best of the authors’ knowledge, the arrangement of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5483633 Thu, 08 Dec 2011 14:33:55 +0100 5483633 Detection performance improvement of chirped amplitude modulation ladar based on Gieger-mode avalanche photoelectric detector http://www.medworm.com/index.php?rid=5483635&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6522 This paper presents an improved system structure of photon-counting chirped amplitude modulation (AM) ladar based on the Geiger-mode avalanche photoelectric detector (GmAPD). The error-pulse probability is investigated with statistical method. The ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5483635 Thu, 08 Dec 2011 05:00:00 +0100 5483635 Tomography of cylindrical objects: comparison of noise property and accuracy of Abel inversion techniques with and without noise filtering http://www.medworm.com/index.php?rid=5473859&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6512 I have analyzed and compared the noise property and accuracy of three kinds of Abel inversion technique, i.e., the polynomial interpolation, versatile polynomial fitting (VPF) and modified Fourier–Hankel (MFH) methods. All these techniques will amplify noise due to the intrinsic property of ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5473859 Mon, 05 Dec 2011 05:00:00 +0100 5473859 Tunable viewing scope of three-dimensional integral imaging http://www.medworm.com/index.php?rid=5473863&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-H230 This article defines the tunable viewing scope (TVS) of three-dimensional integral imaging (3DII) considering the human eye’s performance, which could provide a fine viewing effect without flipping or information missing. TVS required by different applications is achieved through an ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5473863 Fri, 02 Dec 2011 05:00:00 +0100 5473863 Analysis and interpretation of the Seidel aberration coefficients in digital holography http://www.medworm.com/index.php?rid=5473862&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-H220 The most commonly used configurations in digital holography—namely Fourier holograms, Fresnel holograms, and image-plane holograms—are analyzed with respect to Seidel’s wave aberration theory. This analysis is performed by taking into account the phase terms involved in the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5473862 Fri, 02 Dec 2011 05:00:00 +0100 5473862 Calculation method of reflectance distributions for computer-generated holograms using the finite-difference time-domain method http://www.medworm.com/index.php?rid=5473861&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-H211 The research on reflectance distributions in computer-generated holograms (CGHs) is particularly sparse, and the textures of materials are not expressed. Thus, we propose a method for calculating reflectance distributions in CGHs that uses the finite-difference time-domain method. In this method, ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5473861 Fri, 02 Dec 2011 05:00:00 +0100 5473861 Simplified homography matrix for a large-scale camera array system http://www.medworm.com/index.php?rid=5473860&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-H203 We want to use a large-scale camera array system in which each camera is placed at the desired position to photograph a subject and later render images of the subject viewed from various directions or render images for a three-dimensional display. The homography matrix for each camera should be ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5473860 Fri, 02 Dec 2011 05:00:00 +0100 5473860 Reply to “Comment on the precision refractive index measurements of air, N_2, O_2, Ar, and CO_2with a frequency comb” http://www.medworm.com/index.php?rid=5465442&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6486 In reply to this issue’s comment paper on our previous paper [Appl. Opt.47, 3143 (2008)], we clarify several points concerning the validity of the dispersion formula for molecular oxygen. (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465442 Fri, 02 Dec 2011 05:00:00 +0100 5465442 Comment on “Precision refractive index measurements of air, N_2, O_2, Ar, and CO_2 with a frequency comb” http://www.medworm.com/index.php?rid=5465441&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6484 The measured oxygen refractive index formulas are still not sufficient for precise metrological applications. Thus, a new dispersion formula for the molecular oxygen refractive index at standard conditions is derived. The agreement of the standard air refractive index obtained from indices of its ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465441 Fri, 02 Dec 2011 05:00:00 +0100 5465441 Design of bent photonic crystal fiber supporting a single polarization http://www.medworm.com/index.php?rid=5465440&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6505 In this work, it is shown that the differential loss between the TE- and TM-polarized fundamental modes in a highly birefringent photonic crystal fiber (PCF) can be enhanced by bending the fiber. As a result, a design approach for single-mode single-polarization operation has been developed and is ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465440 Fri, 02 Dec 2011 05:00:00 +0100 5465440 Tomographic reconstruction of three-dimensional refractive index fields by use of a regularized phase-tracking technique and a polynomial approximation method http://www.medworm.com/index.php?rid=5465439&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6495 We present a complete data-processing procedure for quantitative reconstruction of three-dimensional (3D) refractive index fields from limited multidirectional interferometric data. The proposed procedure includes two parts: (1) extraction of the projection data from limited multidirectional ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465439 Fri, 02 Dec 2011 05:00:00 +0100 5465439 Design of Dyson imaging spectrometers based on the Rowland circle concept http://www.medworm.com/index.php?rid=5465438&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6487 We aim to show that Dyson imaging spectrometers can be easily designed by applying the concept of the Rowland circle to refracting surfaces. This allows us to conceive an analytical procedure that is based on the removal of astigmatism at two wavelengths. Following this procedure, ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465438 Fri, 02 Dec 2011 05:00:00 +0100 5465438 Probability density of irradiance fluctuations observed over terrestrial ranges http://www.medworm.com/index.php?rid=5465437&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6476 The irradiance fluctuations imposed on a laser beam that has propagated over horizontal terrestrial paths in the range of 2?to 24?km are compared to lognormal (LN) and gamma-gamma (GG) distributions. For the direct links reported here the irradiance fluctuations follow a LN distribution except in ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465437 Fri, 02 Dec 2011 05:00:00 +0100 5465437 Design, production, and reverse engineering of two-octave antireflection coatings http://www.medworm.com/index.php?rid=5465436&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6468 We deal with design and production of optimal two-component antireflection (AR) coatings for an ultra broadband spectral range from 450?nm to 1800?nm. We demonstrate the whole design-production chain including design selection, choosing monitoring technique, coating production, and reverse ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465436 Fri, 02 Dec 2011 05:00:00 +0100 5465436 Quantification of glistenings in intraocular lenses using a ballistic-photon removing integrating-sphere method http://www.medworm.com/index.php?rid=5465435&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6461 An alternative method for quantification of glistenings in intraocular lenses (IOLs) using an integrating sphere with an adjustable back aperture to remove ballistic photons is presented. Glistenings in soft IOLs have been known for more than a decade; however, their severity and visual impact are ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465435 Fri, 02 Dec 2011 05:00:00 +0100 5465435 Continuous-wave terahertz phase imaging using a far-infrared laser interferometer http://www.medworm.com/index.php?rid=5465434&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6452 Terahertz phase imaging can reveal the depth information of an optically opaque object and provide much better contrast for weak-absorption materials. We demonstrate a continuous-wave terahertz interferometric imaging method in which a far-infrared laser interferometer is used to measure the phase ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465434 Fri, 02 Dec 2011 05:00:00 +0100 5465434 Wide field-of-view imaging spectrometer using imaging fiber bundles http://www.medworm.com/index.php?rid=5465433&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6446 A field-of-view-folding approach is proposed to extend the field of view (FOV) of a dispersive imaging spectrometer after introducing several linear arrays of imaging fiber bundles to which to replace the slit. The fiber bundles can flexibly connect fore-optics with a spectrometer to yield an ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465433 Fri, 02 Dec 2011 05:00:00 +0100 5465433 Dual-medium quantitative measurement simulation on cells http://www.medworm.com/index.php?rid=5465432&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6440 For research on inhomogeneous cells, we present a simulation method called the dual-medium quantitative (DMQ) measurement simulation method, which is realized by combining phase-shifting digital holography with DMQ analysis. The reliability of this method is confirmed by comparing the simulated ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465432 Fri, 02 Dec 2011 05:00:00 +0100 5465432 Phase unwrapping algorithms for use in a true real-time optical body sensor system for use during radiotherapy http://www.medworm.com/index.php?rid=5465431&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6430 An evaluation of the suitability of eight existing phase unwrapping algorithms to be used in a real-time optical body surface sensor based on Fourier fringe profilometry is presented. The algorithms are assessed on both the robustness of the results they give and their speed of execution. The ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465431 Fri, 02 Dec 2011 05:00:00 +0100 5465431 Sub-Doppler spectroscopy of metastable atomic particles in ultrathin gas cells http://www.medworm.com/index.php?rid=5465430&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6424 On the basis of density matrix equations, we theoretically investigated narrow sub-Doppler resonances in the spectral distribution of a number of atomic particles (atoms or molecules) optically excited in a metastable state in an ultrathin gas cell with the inner thickness less than or of the order ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465430 Fri, 02 Dec 2011 05:00:00 +0100 5465430 Extracting mineral effects on ultraviolet penetration and its effects in coastal and inland waters: a Monte Carlo study http://www.medworm.com/index.php?rid=5465429&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-35-6409 A factor significantly affecting the ultraviolet (UV) radiation’s interactions with the aquatic environment is the concentration of suspended sediment. We utilize data on UV penetration, absorption, and scattering in Lake Biwa, Japan, reported by Belzile et al. [Limnol. Oceanogr. 47, 95 ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465429 Fri, 02 Dec 2011 05:00:00 +0100 5465429 Joint Applied Optics and Chinese Optics Letters feature introduction: digital holography and three-dimensional imaging http://www.medworm.com/index.php?rid=5465445&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-DH1 This feature issue serves as a pilot issue promoting the joint issue of Applied Optics and Chinese Optics Letters. It focuses upon topics of current relevance to the community working in the area of digital holography and 3-D imaging. (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465445 Thu, 01 Dec 2011 05:00:00 +0100 5465445 Calculation method for computer-generated holograms considering various reflectance distributions based on microfacets with various surface roughnesses http://www.medworm.com/index.php?rid=5465444&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-H195 Computer-generated holograms are generated by three-dimensional technology, and they can be used to reconstruct natural and virtual objects by simulating light waves based on holography. This research was an improvement on previous work that took into consideration reflectance distributions from ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465444 Thu, 01 Dec 2011 05:00:00 +0100 5465444 Three-dimensional displacement measurement for diffuse object using phase-shifting digital holography with polarization imaging camera http://www.medworm.com/index.php?rid=5465443&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-H189 The amount of displacement of a diffused object can be measured using phase-shifting digital holography with a polarization imaging camera. Four digital holograms in quadrature are extracted from the polarization imaging camera and used to calculate the phase hologram. Two Fourier transforms of the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5465443 Thu, 01 Dec 2011 05:00:00 +0100 5465443 Three-dimensional positioning of optically trapped nanoparticles http://www.medworm.com/index.php?rid=5447845&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-H183 We firstly demonstrate the three-dimensional (3D) measurement of a nanometer-sized sphere held in optical tweezers in water using an in-line digital holographic microscope with a green light emitting diode. Suppressing the movement with optical tweezers enabled us to detect the three-dimensional ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5447845 Sat, 26 Nov 2011 14:50:48 +0100 5447845 Improvement of color reproduction in color digital holography by using spectral estimation technique http://www.medworm.com/index.php?rid=5447844&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-H177 We propose a color digital holography by using spectral estimation technique to improve the color reproduction of objects. In conventional color digital holography, there is insufficient spectral information in holograms, and the color of the reconstructed images depend on only reflectances at ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5447844 Sat, 26 Nov 2011 14:50:48 +0100 5447844 Parameter discretization in two-dimensional continuous wavelet transform for fast fringe pattern analysis http://www.medworm.com/index.php?rid=5447849&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6399 The two-dimensional continuous wavelet transform (2D-CWT) technique provides robust processing for digital fringe pattern analysis. To cope with the problem of long computation time, a concept called the cover map is introduced to speed up the 2D-CWT analysis. The cover map is constructed by ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5447849 Fri, 25 Nov 2011 05:00:00 +0100 5447849 Implementation of sine condition test to measure optical system misalignments http://www.medworm.com/index.php?rid=5447848&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6391 Rather than measuring aberrations across the field to quantify the alignment of an optical system, we show how a single, on-axis measurement of the pupil mapping can be used to measure the off-axis performance of the system and determine the state of alignment. In this paper we show how the Abbe ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5447848 Fri, 25 Nov 2011 05:00:00 +0100 5447848 Laser ablation of silicon using a Bessel-like beam generated by a subwavelength annular aperture structure http://www.medworm.com/index.php?rid=5447847&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6384 Using a femtosecond laser incident to an oxide-metal-oxide film engraved with a subwavelength annular aperture (SAA) structure, we generated a Bessel-like beam to ablate silicon. Experimental results show that the silicon can be ablated with a 0.05?J/cm^2 input ablation threshold at 120 fs pulse ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5447847 Fri, 25 Nov 2011 05:00:00 +0100 5447847 Spectrum constructing with nonuniform samples using least-squares approximation by cosine polynomials http://www.medworm.com/index.php?rid=5447846&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6377 The least-squares approximation of cosine polynomials is used to construct the spectrum from the simulated nonuniform samples of the interferogram given by a step-mirror-based static Fourier transform spectrometer. Numerical and experimental results show the stability of the algorithm and a ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5447846 Fri, 25 Nov 2011 05:00:00 +0100 5447846 Phase shift selection for two-step generalized phase-shifting interferometry http://www.medworm.com/index.php?rid=5437517&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-H171 A phase shift selection method is proposed to design algorithms immune against phase shift errors in two-step generalized phase-shifting interferometry. A general formula for wavefront reconstruction error is derived, and its specific expressions for two common errors are also given. Calculation ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5437517 Wed, 23 Nov 2011 13:39:34 +0100 5437517 Holographic polymer-dispersed liquid crystal memory for optically reconfigurable gate array using subwavelength grating mask http://www.medworm.com/index.php?rid=5437516&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6369 Holographic polymer-dispersed liquid crystal (HPDLC) memory formed by a subwavelength grating (SWG) mask is presented for new optical information processing. The SWG structure in a photomask is formed on the SiO_2 plate using the anisotropic reactive ion etching technique. The configuration ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5437516 Wed, 23 Nov 2011 13:39:34 +0100 5437516 Absorption and backscattering coefficients and their relations to water constituents of Poyang Lake, China http://www.medworm.com/index.php?rid=5437515&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6358 This study aimed to measure and analyze the absorption and backscattering coefficients of the main ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5437515 Wed, 23 Nov 2011 13:39:34 +0100 5437515 All-optical isolator under arbitrary linearly polarized fundamental wave in an optical superlattice http://www.medworm.com/index.php?rid=5437519&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6352 We theoretically investigate an all-optical isolator under arbitrary linearly polarized fundamental wave (FW) input in an optical superlattice (OSL). The scheme is based on simultaneously phase matching the first-order Type I (oo-e) quasi-phase-matching (QPM) second-harmonic generation (SHG) ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5437519 Wed, 23 Nov 2011 05:00:00 +0100 5437519 High-resolution full-field optical coherence microscopy using a Mirau interferometer for the quantitative imaging of biological cells http://www.medworm.com/index.php?rid=5437518&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6343 In this paper quantitative imaging of biological cells using high-resolution full-field optical coherence microscopy (FF-OCM) is reported. The FF-OCM was realized using a swept-source system, a Mirau interferometer, and a CCD camera (a two-dimensional detection unit). A Mirau-interferometric ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5437518 Wed, 23 Nov 2011 05:00:00 +0100 5437518 High-speed cross-sectional imaging of valuable documents using common-path swept-source optical coherence tomography http://www.medworm.com/index.php?rid=5428501&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-H165 A common-path swept-source optical coherence tomography (SS-OCT) is a promising scheme for implementing a high-speed and stable OCT system. We investigate the capability of a common-path SS-OCT system to perform the cross-sectional imaging of valuable documents translated at high speed for the ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5428501 Sun, 20 Nov 2011 13:57:13 +0100 5428501 Thermal diffusivity imaging with the thermal lens microscope http://www.medworm.com/index.php?rid=5428500&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6336 A coaxial thermal lens microscope was used to generate images based on both the absorbance and thermal diffusivity of histological samples. A pump beam was modulated at frequencies ranging from 50?kHz to 5?MHz using an acousto-optic modulator. The pump and a CW probe beam were combined with a ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5428500 Sun, 20 Nov 2011 13:57:13 +0100 5428500 Equivalent optical model for lenslike gain medium in continuously single-end-pumped solid-state laser http://www.medworm.com/index.php?rid=5428499&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6327 In order to conveniently and precisely estimate the spot size of laser modes in continuously single-end-pumped solid-state lasers, a ray matrix for the thermal-induced lenslike medium with exponential heat distribution along the axial direction is, for the first time to our best knowledge, derived ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5428499 Sun, 20 Nov 2011 13:57:13 +0100 5428499 Temperature and intensity dependence of Yb-fiber laser light absorption in water http://www.medworm.com/index.php?rid=5428498&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6319 Absorption of CW Yb-fiber laser light of 1.07?μm wavelength in water has been measured at different water temperatures and laser intensities. The absorption coefficient was estimated to be 0.135?cm^−1 at 25?°C water temperature, and this was found to decrease with temperature at ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5428498 Sun, 20 Nov 2011 13:57:13 +0100 5428498 Three-dimensional imaging with simultaneous reproduction of two image elements in one display pixel by linearization of intensity ratio of two images formed by any physical gear http://www.medworm.com/index.php?rid=5428497&cid=s_36566_75_f&fid=36566&url=http%3A%2F%2Fwww.opticsinfobase.org%2Fabstract.cfm%3FURI%3Dao-50-34-6313 Full spatial resolution in stereo image is reached if each (left and right) view of a three-dimensional scene is reproduced by all pixels of the display matrix. It is attractive for this purpose to simultaneously reproduce two image resolvable elements (corresponding to image elements of left and ... (Source: Applied Optics) Applied Optics journals http://www.medworm.com/rss/comments.php?id=5428497 Sun, 20 Nov 2011 13:57:13 +0100 5428497