Dual-aperture optical system for infrared camera

Kim-Hwee Lee

doi:10.1117/12.368511

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4 November 1999 Dual-aperture optical system for infrared camera

Kim-Hwee Lee

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Proceedings Volume 3898, Photonic Systems and Applications in Defense and Manufacturing; (1999) https://doi.org/10.1117/12.368511
Event: International Symposium on Photonics and Applications, 1999, Singapore, Singapore

Abstract

Conventional IR optical systems with high magnification and switchable FOBs suffer form strong unwanted Narcissus effect. This is mainly caused by retro-reflections from the objective lens back to the detector plane. In this project, a new dual aperture optical configuration has been developed to reduce substantially the Narcissus effect while maintaining good optical performance. A design example is presented in this paper. The relative Narcissus Induced Temperature is reduced from about 1.4 degree C to about 0.1 degree C, thus enhancing the detection range of the IR system.

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Kim-Hwee Lee "Dual-aperture optical system for infrared camera", Proc. SPIE 3898, Photonic Systems and Applications in Defense and Manufacturing, (4 November 1999); https://doi.org/10.1117/12.368511

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