单一透镜材料宽温度范围空间相机无热化设计

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关键词：无热化;折反式空间相机;宽温度范围；单一透镜材料中图分类号：TH743 文献标志码：A doi：10.37188/CO.2025-0065 CSTR：32171.14.CO.2025-0065

Abstract： Catadioptric space cameras are widely used in space exploration. However， temperature variations can degrade their imaging performance.To address this issue， we present an athermal design for a catadioptric space camera operating over a wide temperature range. Initially，the temperature efects on optical elements，mechanical structures，and other components wereanalyzed，and convenient methods for thermal aberration compensation are summarized. Subsequently， taking a camera with a spectral range of 400- 1000nm ， a focal length of 525mm ， and an F-number of 3.5 as the design case，an athermal solution is developed. By selecting appropriate materials for the mirror substrates and support structures，and using fused silica as the single lens material to correct aberrations，the optical system maintains stable performance in space environments. Final simulation results confirm that the optimized camera maintains a Modulation Transfer Function （MTF） value above 0.4 at 77lp/mm （Nyquist frequency） over a temperature range of -60∘C to 150∘C . The camera exhibits stable material properties， excellent imaging quality， and consistent performance under extreme temperatures. This design demonstrates significant potential for applications in space exploration and related fields.

Key words： athermalization; catadioptric space camera; wide-temperature-range; single lens material

1引言

空间环境的温度变化范围大，而折反式空间相机又无法密封，因此，一般采用各种热控元件来稳定其工作温度。（剩余11801字）