Modeling of influence of liquid crystal modulator adjustment on reconstruction of birefringence and azimuth angle in imaging polarimetry with carrier frequency

Slawomir Drobczynski; Henryk T. Kasprzak

doi:10.1117/12.577586

26 August 2004 Modeling of influence of liquid crystal modulator adjustment on reconstruction of birefringence and azimuth angle in imaging polarimetry with carrier frequency

Slawomir Drobczynski, Henryk T. Kasprzak

Author Affiliations +

Proceedings Volume 5566, Optical Security and Safety; (2004) https://doi.org/10.1117/12.577586
Event: Optical Security and Safety, 2003, Warsaw, Poland

Abstract

The imaging polarimetry with carrier frequency uses periodically space variation of light polarization obtained with a birefringent wedge, inserted into an optical setup. Implementation of required phase shifting in measuring optical system is performed by use of Liquid Crystal Modulator (LCM). Application of LCM instead of rotational phase plates significantly accelerates measurements and enables recording fast, dynamical variations of both distributions of birefringence and azimuth angle of anisotropic objects. Accuracy of calculation of birefringence and azimuth angle distributions of measured object depends on orientation of LCM in relation to the other optical elements of the system and on accuracy of phase shift given by the LCM. This paper presents the model calculations, which enable to evaluate the influence of the adjustment parameters of LCM on reconstruction of the maps of birefringence and azimuth angle of the measured object.

Citation Download Citation

Slawomir Drobczynski and Henryk T. Kasprzak "Modeling of influence of liquid crystal modulator adjustment on reconstruction of birefringence and azimuth angle in imaging polarimetry with carrier frequency", Proc. SPIE 5566, Optical Security and Safety, (26 August 2004); https://doi.org/10.1117/12.577586

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