Backward Monte Carlo analysis on stray radiation of an infrared optical system

Xue Chen; Chuang Sun; Xinlin Xia

doi:10.1117/12.2032426

11 September 2013 Backward Monte Carlo analysis on stray radiation of an infrared optical system

Xue Chen, Chuang Sun, Xinlin Xia

Proceedings Volume 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications; 89071E (2013) https://doi.org/10.1117/12.2032426
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

In an infrared optical system, the thermal radiation of high temperature components is the major noise as stray radiation that degrades the system performance. Backward Monte Carlo method based on radiation distribution factor is proposed to perform the stray radiation calculation. Theoretical deduction and some techniques are presented, considering the semitransparent element like IR window as radiation emitter. The radiation distribution factors are calculated with ray tracing from the detector to radiation sources. Propagation of stray radiation and its distribution on the detector are obtained simultaneously. It is unnecessary to implement ray tracing again to study the effect of different temperatures for a given system, expect that the geometry or radiative property is changed. An infrared system is simulated using this method. Two different situations are discussed and the analysis shows that stray radiation is mainly created by IR window and lens tube.

Citation Download Citation

Xue Chen, Chuang Sun, and Xinlin Xia "Backward Monte Carlo analysis on stray radiation of an infrared optical system", Proc. SPIE 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications, 89071E (11 September 2013); https://doi.org/10.1117/12.2032426

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