Results 81 to 90 of about 783 (172)

High-dimensional adaptive optics techniques and applications

Adaptive optics (AO) has traditionally been associated with feedback correction of phase aberrations. However, in practical imaging systems, performance is also significantly limited by coupled vectorial errors, including retardance and diattenuation ...
Ma, Yifei
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Ptychography in anisotropic media

, 2015
International audiencePtychography is described in the context of polarized light probing anisotropic specimen, i.e., showing properties of birefringence and/or diattenuation. We establish an optimization strategy using a vectorial formalism.
Ferrand, Patrick, Chamard, Virginie, Allain, Marc   +2 more
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Optimization of fast spectrally encoded Mueller polarimeters for real-time monitoring

, 2019
International audienceIn this paper, we report a generalized theoretical framework on spectrally encoded polarimeters to display in real time both linear and circular retardance as well as linear and circular diattenuation on the basis of a recent ...
Rivet, Sylvain, Grand, Yann Le, Dubreuil, Matthieu   +2 more
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Biases induced by retardance and diattenuation in the measurements of long-baseline interferometers

Astronomy & Astrophysics
Context. The coherence of long-baseline interferometers is affected by the polarization properties of the instrument. This is a possible source of biases, which would need to be calibrated. Aims. The goal of this paper is to study the biases due to retardance and diattenuation in long-baseline interferometers.
openaire   +2 more sources

Quantitative imaging of anisotropic material properties with vectorial ptychography

, 2017
Following the recent establishment of the formalism of vectorial ptychography [Ferrand et al., Opt. Lett. 40, 5144 (2015)], first measurements are reported in the optical range, demonstrating the capability of the proposed method to map the four ...
Virginie Chamard (4793160), Marc Allain (3961844), Patrick Ferrand (2581702), Arthur Baroni (9459026)   +3 more
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Concept design of a multiwavelength aerosol lidar system with mitigated diattenuation effects and depolarization-measurement capability

It is known that the retrieval of aerosol extinction and backscatter coefficients from lidar data acquired through so-called total-power channels – intended to measure the backscattered power irrespective of the polarization – can be adversely affected ...
Sicard, Michaël, Muñoz Porcar, Constantino, Comerón Tejero, Adolfo, Rodríguez Gómez, Alejandro Antonio, García Vizcaíno, David, Barragán Cuesta, Rubén, Vidal Calvo, Eric, Tiana Alsina, Jordi, Rocadenbosch Burillo, Francisco   +8 more
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Quantitative imaging of anisotropic material properties with vectorial ptychography

, 2018
International audienceFollowing the recent establishment of the formalism of vectorial ptychography [Ferrand et al., Opt. Lett. 40, 5144 (2015)], first measurements are reported in the optical range, demonstrating the capability of the proposed method to
Arthur Baroni, Marc Allain, Baroni, Arthur, Ferrand, Patrick, Patrick Ferrand, Chamard, Virginie, Allain, Marc, Virginie Chamard   +7 more
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Analysis of the Errors in Polarimetry with Full Poincarè Beams

, 2019
The main error sources of a recently proposed Mueller matrix polarimetric method based on the use of full Poincaré beams (FPBs) are described and analysed in detail.
M. Santarsiero, G. Piquero, Piquero Sanz, Gemma, J. C. Suarez-Bermejo, González de Sande, Juan Carlos, Suárez Bermejo, Juan Carlos, Santarsiero, Massimo, J. C. Gonzalez de Sande   +7 more
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Fiber-based polarization-sensitive OCT of the human retina with correction of system polarization distortions

, 2014
In polarization-sensitive optical coherence tomography (PSOCT) the use of single-mode fibers causes unpredictable polarization distortions which can result in increased noise levels and erroneous changes in calculated polarization parameters.
Vermeer, K.A., de Boer, J.F.; id_orcid, de Boer, J.F., Braaf, B., Vienola, K.V., de Groot, M., Vienola, K.V.; id_orcid   +6 more
core   +1 more source

Polarimetric road ice detection

, 2014
This thesis investigated the science behind polarimetric road ice detection systems. Laboratory Mueller matrix measurements of a simulated road under differing surface conditions were collected searching for a discriminatory polarization property.
Drummond, Krista
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