Study on selection of imaging optical system on catenary under extreme temperature variations

Zhiqing Wu; Jihong Wang

doi:10.1117/12.2667735

6 March 2023 Study on selection of imaging optical system on catenary under extreme temperature variations

Zhiqing Wu, Jihong Wang

Proceedings Volume 12553, Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022); 1255309 (2023) https://doi.org/10.1117/12.2667735
Event: 2022 4th International Conference on Optoelectronic Science and Materials (ICOSM2022), 2022, Henfei, China

Abstract

High-speed rail catenary fails easily due to foreign objects intrusion. Foreign objects are identified by machine vision now. However, extreme temperature changes can degrade the imaging quality of the optical system, leading to increased difficulty in foreign object identification at high altitudes. We design different types of optical systems for targets at 2 km away by Zemax and carried out thermal analysis to obtain the variation pattern of system imaging quality at different temperatures for telephoto structures and Schmidt-Cassegrain systems. The results show that Schmidt-Cassegrain structures are better adapted to wide temperature environments than telephoto structures. After correction for defocus, the Schmidt-Cassegrain structure is almost unaffected by temperature, and the telephoto structure also has good image quality within a certain temperature range. It shows that the Schmidt Cassegrain structure is more suitable for inspection along the Sichuan-Tibet Railway.

Citation Download Citation

Zhiqing Wu and Jihong Wang "Study on selection of imaging optical system on catenary under extreme temperature variations", Proc. SPIE 12553, Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022), 1255309 (6 March 2023); https://doi.org/10.1117/12.2667735

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