15 October 2012 Method of measuring the rotation angle based on uniaxial crystal conoscopic interference in polarimeter
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Proceedings Volume 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 84173J (2012) https://doi.org/10.1117/12.977849
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China
Abstract
A method of measuring the rotation angle in polarimeter is proposed .To analysis uniaxial crystal convergence polarization-interference phenomenon with Jones Matrix, the polarizer rotates an angle relatively to the analyzer , the relationship between the rotation angle of cross-shape pattern θ1 and the polarized plane rotation angle 2caused by the polarizer (or optical activity) is deduced:θ2 =2θ1.This rule can be used to measure the rotation angle in polarimeter: the polarized plane will rotate when it transmits the optical activity substance ,so the angle of cross-shape pattern will rotate. Using CCD camera to shoot the conoscopic interference pattern, measure the angle of cross-shape pattern rotated by image processing technology to obtain the angle of polarized plane rotation. Experiment is designed to demonstrate this method. Comparing the method of the stepping-motor rotating the analyzer to detect the dark position and measure the angle, this new method is real-time , digital and automation for measuring the rotatory power in polarimeter.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yantang Huang, Yantang Huang, Ling Ou, Ling Ou, Jincheng Wang, Jincheng Wang, } "Method of measuring the rotation angle based on uniaxial crystal conoscopic interference in polarimeter", Proc. SPIE 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 84173J (15 October 2012); doi: 10.1117/12.977849; https://doi.org/10.1117/12.977849
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