航天鱼眼相机光学系统设计的研究

Optical System Design of Space Fisheye Camera

充分考虑鱼眼相机应用的空间环境特点,设计了一款基于1/3inch(1inch=25.4mm)CCD的航天鱼眼相机光学系统,系统焦距2.1mm,F数为4,视场角为210°,工作温度-40℃～+60℃。重点研究了环境因素对鱼眼相机光学系统成像质量的影响,分别从抗空间带电粒子、抗紫外辐照、温度和气压适应性方面进行了分析和研究,给出了相应的解决思路和方法。相机在严峻的空间环境下具有良好的环境适应性,为在轨获得超广角空域信息提供了保证。

Optical system of a space fisheye camera based on 1/3 inch（1 inch=25.4 mm） CCD is designed considering the space environment.The focal length of the fisheye optical system is 2.1 mm,the F number is 4,and the field of view is 210°.The required working temperature is between-40 ℃～＋60 ℃.After careful studying the influence of space environment such as the space γ radiation and ultraviolet radiation,temperature change and vacuum on the optical system,the technique for keeping image quality in space environment is put forward.The fisheye lens can reach excellent imaging quality in such an austere environment,and provide important guarantee for information capture with extreme wide-angle view on the orbit.