Active polarimetric imager for detection of static and moving manufactured objects in natural environment

A. Martin; L. Leviandier Jr.; M. Boffety; H. Sauer; J. Dupont; S. Roussel; B. Le Teurnier; F. Goudail; V. Noguier; P. Potet; N. Vannier; P. Goguillon

doi:10.1117/12.2596135

12 September 2021 Active polarimetric imager for detection of static and moving manufactured objects in natural environment

A. Martin, L. Leviandier Jr., M. Boffety, H. Sauer, J. Dupont, S. Roussel, B. Le Teurnier, F. Goudail, V. Noguier, P. Potet, N. Vannier, P. Goguillon

Author Affiliations +

Proceedings Volume 11866, Electro-Optical and Infrared Systems: Technology and Applications XVIII and Electro-Optical Remote Sensing XV; 118660L (2021) https://doi.org/10.1117/12.2596135
Event: SPIE Security + Defence, 2021, Online Only

Abstract

We report on the development and field trials of an active polarimetric imager in the SWIR domain. Polarization states are controlled for both emission and analysis. Based on past experience, we focus on Orthogonal State Contrast (OSC) imaging for which two images with orthogonal polarizations are needed. An important feature of the imager is the use of two InGaAs imaging detectors mounted orthogonally on a polarization beam splitter. This allows the synchronous imaging with the two orthogonal polarizations and the real time acquisition of OSC images at video frame rate without temporal artefacts. The demonstrator has been operated during field trials with static and moving scenes. These trials were mainly aimed at the detection of man-made objects (weapons, vehicles …) in complex scenes at up to a few hundreds of meters. Along with the presentation of some example of results, we discuss different representation modes of the polarimetric information.

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A. Martin, L. Leviandier Jr., M. Boffety, H. Sauer, J. Dupont, S. Roussel, B. Le Teurnier, F. Goudail, V. Noguier, P. Potet, N. Vannier, and P. Goguillon "Active polarimetric imager for detection of static and moving manufactured objects in natural environment", Proc. SPIE 11866, Electro-Optical and Infrared Systems: Technology and Applications XVIII and Electro-Optical Remote Sensing XV, 118660L (12 September 2021); https://doi.org/10.1117/12.2596135

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