Real-time polarization measurement with FPGA processing

Arun Jayaseelan; David Voelz

doi:10.1117/12.619570

18 August 2005 Real-time polarization measurement with FPGA processing

Arun Jayaseelan, David Voelz

Proceedings Volume 5888, Polarization Science and Remote Sensing II; 58881K (2005) https://doi.org/10.1117/12.619570
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Existing polarization imaging cameras typically use a set of sequential measurements and involve some physical motion of optical elements or changes in a liquid crystal element. In this paper, we present a spatially parallel polarization measurement approach that is designed to give measurements in real time. The idea is to use a group of 2×2 detectors where each detector responds to a different polarization. The signals from the detectors are sent to a digital processing unit where polarization parameters of interest are calculated in real-time. A laboratory prototype is presented that uses a quad-cell photodiode detector array with different polarizing elements placed over each detector. The signals from the detector elements are sent through amplifiers to A/D converters and then into a Field Programmable Gate Array (FPGA). This high-performance processing unit calculates various parameters such as degree of polarization and partial polarization. As the processing unit is fast, real-time operation is possible. Arrays of 2×2 groups will ultimately be required for image sensing.

Citation Download Citation

Arun Jayaseelan and David Voelz "Real-time polarization measurement with FPGA processing", Proc. SPIE 5888, Polarization Science and Remote Sensing II, 58881K (18 August 2005); https://doi.org/10.1117/12.619570

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