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9 October 2021 Effective frequency band and signal extraction of dynamic Stokes vector measurements
Wei Guo, Nan Zeng, Jiawei Song, Hui Ma
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Proceedings Volume 11896, Advanced Optical Imaging Technologies IV; 118960Y (2021) https://doi.org/10.1117/12.2601487
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China
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Abstract
A common polarization measurement system consists of a quarter-wave plate and a linear polarizer, and the rotation of the wave plate can provide different phase retardance. However, the rotating phase retarder will introduce some unwanted frequency components in the light intensity signal, which may affect the correct information extraction for dynamic observation of the optical process. In this work, we analyzed the effective working frequency band of the polarization measurement system and pointed out how to judge the reliability of dynamic periodic polarization signals. We present the parameter selection strategy of the cutoff frequency of the filter, sampling frequency and rotation angular velocity for a specific dynamic polarization change of scattered light. Finally, we apply our work in the polarization monitoring of tissue optical clearing and show the improvement of the measurement stability and accuracy.
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Wei Guo, Nan Zeng, Jiawei Song, and Hui Ma "Effective frequency band and signal extraction of dynamic Stokes vector measurements", Proc. SPIE 11896, Advanced Optical Imaging Technologies IV, 118960Y (9 October 2021); https://doi.org/10.1117/12.2601487
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KEYWORDS
Polarization
Light scattering
Signal processing
Polarizers
Atmospheric particles
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