Presentation + Paper
3 October 2023 Mueller polarimetry for quantifying the stress optic coefficient in the infrared
Jeremy Parkinson, Patrick Coronato, Jake Greivenkamp, Daniel Vukobratovich, Meredith Kupinski
Author Affiliations +
Abstract
The stress optic coefficient of an infrared transmitting material was measured at room temperature at a wavelength of 1550nm. This work discusses a Mueller matrix imaging experiment to measure the stress optic coefficient, observe the spatial distribution of birefringence, and quantify experimental sources of uncertainty. A one-inch diameter disk of sample material was diametrically loaded with increasing force, and linear retardance was measured in the central region. Finite element and analytical modeling was done to estimate the magnitude of stress in this central region. A Rotating Retarder Mueller Matrix Imaging Polarimeter measured the spatial distribution of linear retardance. The retardance is related to the change in birefringence with stress magnitude. The slope of this linear fit is the stress optic coefficient. The stress optic coefficient of the infrared transmitting material was measured to be 1.89 ± 0.1424 [TPa]−1. To test the precision of our stress optic coefficient measurement procedure, a 1-inch diameter N-BK7 disk was measured at a wavelength of 1550nm and compared with industry-accepted values. The stress optic coefficient of N-BK7 was measured as 2.83 ± 0.1057[TPa]−1. The published N-BK7 value measured at visible wavelengths is 2.77 [TPa]−1 ± 3%.1–3 This agreement validates the experimental Mueller matrix imaging methods and supports the common assumption of minor wavelength dependence of the stress optic coefficient.
Conference Presentation
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jeremy Parkinson, Patrick Coronato, Jake Greivenkamp, Daniel Vukobratovich, and Meredith Kupinski "Mueller polarimetry for quantifying the stress optic coefficient in the infrared", Proc. SPIE 12690, Polarization Science and Remote Sensing XI, 126900C (3 October 2023); https://doi.org/10.1117/12.2676478
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KEYWORDS
Mueller matrices

Polarimetry

Birefringence

Polarization

Analytic models

Finite element methods

Infrared radiation

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