Research on the performance of thermal shock and stress with infrared optical domes

Youtang Gao; Jianliang Qiao; Jun Niu; Yuan Xu; Yi Yang

doi:10.1117/12.2071675

2 September 2014 Research on the performance of thermal shock and stress with infrared optical domes

Youtang Gao, Jianliang Qiao, Jun Niu, Yuan Xu, Yi Yang

Proceedings Volume 9280, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 92800S (2014) https://doi.org/10.1117/12.2071675
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China

Abstract

The development of infrared optical materials is always closely related to the research and exploration of material science. The infrared optical domes bears shock and produces stress when the infrared optical domes mounted on the missile moving at a high speed is shocked by high temperature. According to aerodynamics theory and thermo shock theory, the surge current will be transferred to optical parts through holding up layer and warms the surface of optical parts when infrared optical parts are shocked by high temperature. A compress stress is formed on the hot external surface of optical parts forms and a tension stress is formed on the internal surface or optical parts under the circumstance of the edge of optical parts being fixed. The windows of optical parts become curvature radius of lens with the function of pressure difference which can cause aberration change. The brittle fracture of material will be caused if peak stress is beyond the strength which is permitted for infrared materials. Therefore, limits to design of windows thickness is proposed in this paper.

Citation Download Citation

Youtang Gao, Jianliang Qiao, Jun Niu, Yuan Xu, and Yi Yang "Research on the performance of thermal shock and stress with infrared optical domes", Proc. SPIE 9280, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 92800S (2 September 2014); https://doi.org/10.1117/12.2071675

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