Optical polarization: background and camouflage

Christina Åkerlind; Tomas Hallberg; Johan Eriksson; Hans Kariis; David Bergström

doi:10.1117/12.2278767

5 October 2017 Optical polarization: background and camouflage

Christina Åkerlind, Tomas Hallberg, Johan Eriksson, Hans Kariis, David Bergström

Proceedings Volume 10432, Target and Background Signatures III; 1043204 (2017) https://doi.org/10.1117/12.2278767
Event: SPIE Security + Defence, 2017, Warsaw, Poland

Abstract

Polarimetric imaging sensors in the electro-optical region, already military and commercially available in both the visual and infrared, show enhanced capabilities for advanced target detection and recognition. The capabilities arise due to the ability to discriminate between man-made and natural background surfaces using the polarization information of light. In the development of materials for signature management in the visible and infrared wavelength regions, different criteria need to be met to fulfil the requirements for a good camouflage against modern sensors. In conventional camouflage design, the aimed design of the surface properties of an object is to spectrally match or adapt it to a background and thereby minimizing the contrast given by a specific threat sensor. Examples will be shown from measurements of some relevant materials and how they in different ways affect the polarimetric signature. Dimensioning properties relevant in an optical camouflage from a polarimetric perspective, such as degree of polarization, the viewing or incident angle, and amount of diffuse reflection, mainly in the infrared region, will be discussed.

Citation Download Citation

Christina Åkerlind, Tomas Hallberg, Johan Eriksson, Hans Kariis, and David Bergström "Optical polarization: background and camouflage", Proc. SPIE 10432, Target and Background Signatures III, 1043204 (5 October 2017); https://doi.org/10.1117/12.2278767

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