Thermal deformation suppression method for chalcogenide glass based on deep cryogenic treatment

Hao Zhang; Jianmin An; Weihao Li; Xiaodong Zhang

doi:10.1117/12.2604071

13 December 2021 Thermal deformation suppression method for chalcogenide glass based on deep cryogenic treatment

Hao Zhang, Jianmin An, Weihao Li, Xiaodong Zhang

Proceedings Volume 12071, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing and Metrology Technologies; 1207113 (2021) https://doi.org/10.1117/12.2604071
Event: Tenth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2021), 2021, Chengdu, China

Abstract

In infrared optical system, changes of the reflective index will result in a decrease in imaging quality. Therefore, athermalized treatment is necessary. Chalcogenide glasses (As₄₀Se₆₀) are the ideal material for thermal aberration correction in infrared optical systems, which have excellent infrared optical properties, especially the transmission performance and temperature characteristics. However, thermal deformation is inevitable for chalcogenide glasses in the coating process, which is a major cause of quality deterioration. In this paper, a deep cryogenic treatment with a series of specific parameters is carried out and a comparative experiment is conducted. The result shows that the thermal stability of chalcogenide glass in the coating process is improved markedly after deep cryogenic treatment. The thermal deformation of the optical surface is reduced and the surface accuracy is controllable.

Citation Download Citation

Hao Zhang, Jianmin An, Weihao Li, and Xiaodong Zhang "Thermal deformation suppression method for chalcogenide glass based on deep cryogenic treatment", Proc. SPIE 12071, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing and Metrology Technologies, 1207113 (13 December 2021); https://doi.org/10.1117/12.2604071

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