Design of the infrared dual-band athermalized optical system based on HDE

Keyan Dong; Lianguang Zhang; Jian Wang; Hongliang Wang; Qiang Sun; Zhenwu Lu

doi:10.1117/12.835737

4 August 2009 Design of the infrared dual-band athermalized optical system based on HDE

Keyan Dong, Lianguang Zhang, Jian Wang, Hongliang Wang, Qiang Sun, Zhenwu Lu

Proceedings Volume 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications; 73831B (2009) https://doi.org/10.1117/12.835737
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

A dual-band infrared optical system adopting an uncooled LW infrared detector and a cooled MW infrared detector is designed and manufactured, based on the athermal ability and special diffractive properties of harmonic diffractive elements. The design shows in the MW IR band the F/# is 2 and the focal length is 72 mm, for the temperature range -40 °C ~ 70°C the MTF value is over 0.4 at 20 lp/mm; while in the LW IR band the F/# is 1 and the focal length is 114 mm, for the temperature range -40° ~ 70° the MTF value is over 0.5 at 10 lp/mm. Finite element method is applied to the opto-mechanic structure of the system for thermal analysis, which confirms the imaging ability of the system in a wide temperature range.

Citation Download Citation

Keyan Dong, Lianguang Zhang, Jian Wang, Hongliang Wang, Qiang Sun, and Zhenwu Lu "Design of the infrared dual-band athermalized optical system based on HDE", Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 73831B (4 August 2009); https://doi.org/10.1117/12.835737

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