Optical system design with wide temperature range and long focal length based on linear thermal expansion opto-mechanical model

Xuanzhi Zhang; Weijun Chang; Bo Zhang; Guoqi Teng

doi:10.1117/12.3014095

30 April 2024 Optical system design with wide temperature range and long focal length based on linear thermal expansion opto-mechanical model

Xuanzhi Zhang, Weijun Chang, Bo Zhang, Guoqi Teng

Author Affiliations +

Proceedings Volume 13153, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Technologies in Optical Systems; 131530C (2024) https://doi.org/10.1117/12.3014095
Event: Sixth Conference on Frontiers in Optical Imaging Technology and Applications (FOI2023), 2023, Nanjing, JS, China

Abstract

With the growth of military demand for multi-spectrum, high-resolution, long-range photoelectric reconnaissance and surveillance, large-aperture multispectral optical system with common aperture is widely used in airborne optoelectronic mission payloads. At the flight altitude of 10000 meters, the optical system actually works at -30℃ ambient temperature, while it is assembled and tested at room temperature. Therefore, the airborne optical system should ensure excellent image performance in the wide temperature range, such as from -50℃ to +70℃. A large aperture catadioptric optical system with long focal length is designed. The optical model with zoom multi-configuration structures at room temperature, high temperature and low temperature is established, and it is based on the linear thermal expansion thermal-structural-optical integrated model. Optical focusing variables are introduced at high temperature and low temperature to optimize the image quality at the respective temperature. The optical system has excellent image performance at both high temperature and low temperature. The design results show that the waveband is 0.7μm～0.9μm. The MTF of the catadioptric optics with relative aperture F/3.6 and focal length 900mm is close to the optical diffraction limit at +20℃, -50℃ and +70℃, which ensures good image quality from -50℃ to +70℃.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xuanzhi Zhang, Weijun Chang, Bo Zhang, and Guoqi Teng "Optical system design with wide temperature range and long focal length based on linear thermal expansion opto-mechanical model", Proc. SPIE 13153, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Technologies in Optical Systems, 131530C (30 April 2024); https://doi.org/10.1117/12.3014095

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