Design of high resolution for VIS/IR composite space optical system

Yongdan Jia; Jian Sun; fangfang Liu; guili Cao; Yunsong Nie

doi:10.1117/12.2620591

27 March 2022 Design of high resolution for VIS/IR composite space optical system

Yongdan Jia, Jian Sun, fangfang Liu, guili Cao, Yunsong Nie

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121690P (2022) https://doi.org/10.1117/12.2620591
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

According to the need of high resolution and VIS/IR composite image, the task requirements and the necessity of spectrum selection were given. based on the analysis of the imaging mode, the design route of VIS/IR composite imaging using off-axis linear field of optical system is determined. According to the aberration auto-balance optimization of optical design software, the two channel aberrations were initially balanced. The aspheric surfaces were introduced to correct residual aberration, and the compact requirement of the composite optical system is realized. An example of the design was given, The technical indicators: The VIS channel optical system focal length is 7800mm,F number is 11.73,field of view is 2.2°×0.2°,the operating wave band is 400~900nm, the modulation transfer function of the pan-spectral is above 0.30 all over the field of view at the Nyquist frequency of 71.4lp/mm, the modulation transfer function of the multi-spectral is above 0.80 all over the field of view at the Nyquist frequency of 18lp/mm. The IR channel optical system focal length is 2500mm,F number is 3.76,field of view is 3°×0.2°,the operating wave band is 3~5μm, the modulation transfer function of the system is above 0.32 all over the field of view at the Nyquist frequency of 33lp/mm. The system can achieved the resolution 0.45m/3m at 500km orbital altitude.

Citation Download Citation

Yongdan Jia, Jian Sun, fangfang Liu, guili Cao, and Yunsong Nie "Design of high resolution for VIS/IR composite space optical system", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121690P (27 March 2022); https://doi.org/10.1117/12.2620591

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KEYWORDS

Infrared imaging

Imaging systems

Infrared radiation

Visible radiation

Image resolution

Modulation transfer functions

Cameras

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