Results 111 to 120 of about 441 (148)

Linear diattenuation sensitive lens-free holographic microscope

Digital Holography and 3-D Imaging 2022, 2022
We report the implementation of the simplest lens-free holographic microscope sensitive to linear diattenuation of biological samples using two linear polarizers. We validate our proposal by imaging calcium oxalate crystals and potato starch grains.
Maria J. Lopera, Carlos Trujillo
openaire   +1 more source

Linear diattenuation imaging of biological samples with digital lensless holographic microscopy

Applied Optics, 2021
A digital lensless holographic microscope (DLHM) sensitive to the linear diattenuation produced by biological samples is reported. The insertion of a linear polarization-states generator and a linear polarization-states analyzer in a typical DLHM setup allows the proper linear diattenuation imaging of microscopic samples.
Maria J. Lopera, Carlos Trujillo
openaire   +2 more sources

Average double-pass ocular diattenuation using foveal fixation

Journal of Modern Optics, 2008
The average amount of ocular diattenuation was studied using a double-pass polarimeter. This was directly computed from the central part of the elements of the first row of the Mueller matrix obtained from a series of 16 double-pass retinal images. For a 633 nm wavelength, the results show that the parameter is 0.10, on average.
Juan M Bueno, Pablo Artal
exaly   +2 more sources

Three-dimensional polarization ray tracing and diattenuation calculation

Proceedings of SPIE, 2010
A three-by-three polarization ray tracing matrix P for calculating polarization transformations associated with ray paths through optical systems is presented. Diattenuation of the optical system is calculated via singular value decomposition of the P matrix.
Garam Yun, Karlton Crabtree, Russell A. Chipman   +2 more
exaly   +2 more sources

Mapping of retardance, diattenuation and polarizance vector on Poincare sphere for diagnosis and classification of cervical precancer

Journal of Biophotonics, 2020
AbstractThe mapping of diattenuation, polarizance and retardance vector (normalized Stokes vector) on Poincare sphere, evaluated from Mueller matrix of optically anisotropic stromal region of cervical tissues, is presented for cervical precancer detection and its staging.
Mohammad Zaffar, Asima Pradhan
exaly   +3 more sources

Measurements of linear diattenuation and linear retardance spectra with a rotating sample spectropolarimeter

Applied Optics, 1993
A technique to measure linear diattenuation and retardance spectra of infrared materials in transmission is described. A sample is rotated between two stationary linear polarizers in the sample compartment of a Fourier transform infrared spectrometer.
David B Chenault
exaly   +3 more sources

Measurement of linear birefringence and diattenuation properties of optical samples using polarimeter and Stokes parameters

Optics Express, 2009
A technique is proposed for measuring the linear birefringence and linear diattenuation of an optical sample using a polarimeter. In the proposed approach, the principal axis angle (alpha), phase retardance (beta), diattenuation axis angle (thetad), and diattenuation (D) are derived using an analytical model based on the Mueller matrix formulation and ...
Yu-Lung Lo, Jing-Fung Lin
exaly   +3 more sources

Measuring diattenuation with alternating input state PS-OCT

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIX
Martin Villiger
exaly   +2 more sources

Characterization in Birefringence / Diattenuation of an Optical Fiber in a Fiber-Type Polarimetry

Conference Proceedings of the Society for Experimental Mechanics, 2011
An analytical technique based on the Mueller matrix method and the Stokes parameters is proposed for extracting five effective parameters on the principal axis angle, phase retardance, diattenuation axis angle, diattenuation and optical rotation angle of anisotropic optical materials.
Thi-Thu-Hien Pham, Yu-Lung Lo, Lo Yu-Lung   +2 more
exaly   +2 more sources

Three-dimensional polarization ray-tracing calculus I: definition and diattenuation

Applied Optics, 2011
A three-by-three polarization ray-tracing matrix method for polarization ray tracing in optical systems is presented for calculating the polarization transformations associated with ray paths through optical systems. The method is a three-dimensional generalization of the Jones calculus. Reflection and refraction algorithms are provided.
Garam, Yun, Karlton, Crabtree, Russell A, Chipman   +2 more
openaire   +2 more sources