高精度动态星模拟器的光学系统设计

为了完成星敏感器的地面标定工作,满足动态星模拟器大视场、高精度的技术要求,根据动态星模拟器的工作原理,利用ZEMAX软件完成光学系统设计,实现了高精度动态星模拟器准确模拟星点。实验结果表明:系统焦距为110 mm,视场为16°,光谱范围为0.5～0.8 μm,全视场角内准直光学系统相对畸变≤0.05%,在60线对/mm时调制传递函数（MTF）优于0.7。提出了装配后确定系统实际焦面的方法,最后对光学系统实际出射精度进行分析和实验验证,验证结果表明:设计的高精度动态星模拟器光学系统的成像精度达到9″,实测的星间角距误差均优于13″,整个系统可以满足高精度动态星模拟器的使用要求。

Optical System Design of High Precision Dynamic Star Simulator

In order to complete the calibration work of the star sensor and meet the technology requirement of large field, high accuracy for dynamic star simulator, the ZEMAX software is used to complete the design of the optical system according to the dynamic star simulator working principle, which can accurately simulate the star point. The experimental results show that the focal length of the system is 110 mm, the field of view is 16°, the distortion is less than 0.05%, the wave range is 0.5～0.8 μm and the MTF is higher than 0.7 at the frequency of 60 lp/mm. The method to determine the actual focal plane of the system after assembly is put forward, and then the precision of the optical system are analyzed. The results show that the imaging accuracy design of high-precision dynamic star simulator optical system can reach 9″, and the error between stars is less than 13″. So the whole system can meet the using need of the high-precision dynamic star simulator.