Suppression and simulation of stray radiation in infrared optical system

Jianguo Tian; Mingqian Shi; Linbao Hou; Wen Gao; Jicai Rui; Bin Zhou

doi:10.1117/12.2652211

20 December 2022 Suppression and simulation of stray radiation in infrared optical system

Jianguo Tian, Mingqian Shi, Linbao Hou, Wen Gao, Jicai Rui, Bin Zhou

Proceedings Volume 12315, Optical Design and Testing XII; 123151R (2022) https://doi.org/10.1117/12.2652211
Event: SPIE/COS Photonics Asia, 2022, Online Only

Conference Poster

Abstract

The sources of different spurious radiation in infrared optical system are analyzed, and the measures to suppress the spurious radiation are listed. Taking the infrared optical system of a detector as an example, the stray radiation of the infrared optical system is suppressed by setting the lyot stop. The optical and mechanical structure model of the infrared optical system was established, and the Monte Carlo method in LightTools software was used for ray tracing analysis. The illuminance of the image plane of the detector after adding lyot stop was obtained, and the point source transmittance (PST) and veiling glare index (V) of the infrared system were calculated, and the effectiveness of the suppression effect was evaluated. At the same time, the background heat radiation of the internal optical and mechanical structure of the infrared optical system is simulated and analyzed. The comprehensive consideration ensures that the imaging quality of the infrared optical system is not affected.

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Jianguo Tian, Mingqian Shi, Linbao Hou, Wen Gao, Jicai Rui, and Bin Zhou "Suppression and simulation of stray radiation in infrared optical system", Proc. SPIE 12315, Optical Design and Testing XII, 123151R (20 December 2022); https://doi.org/10.1117/12.2652211

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