Passive athermalization of optical systems for thermal devices

Tatyana N. Khatsevich; Evgeny V. Druzhkin

doi:10.1117/12.2601732

15 December 2021 Passive athermalization of optical systems for thermal devices

Tatyana N. Khatsevich, Evgeny V. Druzhkin

Proceedings Volume 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 119160J (2021) https://doi.org/10.1117/12.2601732
Event: 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2021, Moscow, Russian Federation

Abstract

In this paper a structural scheme of a telecentric lens for a thermal imaging camera without a protective case allowing to carry out a passive athermalization when the operating temperature changes in the atmosphere is proposed. The relationship between the parameters of lenses and the characteristics of materials, which make it possible to limit the number of materials to two, has been found. It is shown that the requirement for the temperature coefficient of linear expansion of the device case material is determined by the thermo-optical constants and the coefficients of the average dispersion of the lens materials. The results of the development of an athermalized objective lens having a relative aperture equal to f /1 are presented.

Citation Download Citation

Tatyana N. Khatsevich and Evgeny V. Druzhkin "Passive athermalization of optical systems for thermal devices", Proc. SPIE 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 119160J (15 December 2021); https://doi.org/10.1117/12.2601732

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