From Event: SPIE Commercial + Scientific Sensing and Imaging, 2018
Measured extinction ratio on high quality linear polarizers depends on test system geometry. The measurement becomes especially challenging for polarizers with extinction ratio expected to exceed 106. We describe methods capable of measurements of high purity polarizers at and above 106 extinction ratio. We discuss the geometrical factors affecting the measured results that may be pertinent in determining what performance is achievable in a users system. We describe methods for computing extinction ratios without an absolute reference perfect polarizer with infinite extinction ratio and for rank ordering performance of a set of several polarizers. Measurement results are presented for several high performance polarizers including Glan-Thompson polarizers, dichroic glass polarizers and Meadowlark Optics Ultra Broadband Polarizers.
Michael Kraemer and Tom Baur, "Extinction ratio measurements on high purity linear polarizers," Proc. SPIE 10655, Polarization: Measurement, Analysis, and Remote Sensing XIII, 1065505 (Presented at SPIE Commercial + Scientific Sensing and Imaging: April 16, 2018; Published: 14 May 2018); https://doi.org/10.1117/12.2305166.
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