R-C光学系统的计算机辅助装调

Computer aided alignment of R-C optical system

R-C光学系统是现代光学工程中常用的光学系统,以某一R-C光学系统为例,对其计算机辅助装调技术进行了研究。分析了R-C系统装调理论,确定以主镜为装调基准,调整次镜五个自由度的装调方法,建立起次镜失调量与系统Zernike系数的关系,以此指导装调工作,达到明确装调方向、缩短装调周期的目的。整机光学系统的波像差RMS值优于1/10波长,达到了成像质量的要求。对相机进行实验室和地面外场成像,获得的图像图像清晰,层次丰富,验证了装调工作的正确性。

R-C optical system was a commonly used optical system in modern optical engineering, a case study of alignment technique of R-C optical system was stuided. The alignment theory of R-C optical system was analyzed. The main mirror was the adjustment datum, the five degree of freedom of secondary mirror was adjusted to improve the wavefront error of the whole optical system. The relationship between secondary mirror misalignment and Zernike coefficient of the whole system was obtained by computer-aided alignment and was used to guide alignment of secondary mirror. By use of this method, the alignment purpose was very clearly, that was adjusting the position of secondary mirror to reduce Zernike coefficient. The alignment period was then reduced. After alignment, wavefront error of the whole optical system was better than 1/10λ（RMS）. It satisfies the design requirement. The images obtained from laboratory and outfield indicate the alignment is valid.