Design of an infrared four-mirror optical system with large relative aperture

Bin Cong; Zheng Wu

doi:10.1117/12.2175662

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13 April 2015 Design of an infrared four-mirror optical system with large relative aperture

Bin Cong, Zheng Wu

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Proceedings Volume 9522, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics 2014, Part II; 952205 (2015) https://doi.org/10.1117/12.2175662
Event: Selected Proceedings of the Photoelectronic Technology Committee Conferences held August-October 2014, 2014, China, China

Abstract

Reflective optics is used widely in optical systems for their achromatization, large aperture and lightweight compared with refractive systems. An infrared four-mirror optical system with large relative aperture working in the 7.7～10.3 micron long wavelength infrared band is designed by using four reflective mirrors. The design principle, design results are described in this paper. The system has a circinal wide field of view with 1.5°×1.5°. The MTF of the system is diffraction-limited and the distortion is less than 1.0%. The ratio of focal length to total length is about 1/1.04,so the structure of the system is compact. The image quality is evaluated for each field, which shows that the design makes a good system with high image quality.

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Bin Cong and Zheng Wu "Design of an infrared four-mirror optical system with large relative aperture", Proc. SPIE 9522, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics 2014, Part II, 952205 (13 April 2015); https://doi.org/10.1117/12.2175662

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