大口径光学离轴平行光管研究——主反镜结构及光学检测

Large aperture off-axis collimator:primary mirror structure and optical inspection

在长焦距大口径平行光管的应用中,平行光管物镜的定位精度以及在装调过程中高灵敏度的调试环节十分重要。介绍大口径离轴光学平行光管主镜结构及其检测方法,给出3种不同口径下的光学系统的装调方法,详细分析Φ700 mm的平行光管的主镜结构及精调装置,并利用4D干涉仪来检测装调装置对面形的影响。结果表明,该装调装置为自由移动装置,在移动过程中不影响面型精度;俯仰及转动精度优于3″,且具有6个自由度。

In the applications of collimator with large diameter and long focal length,the position accuracy of the collimator objective and its sensitive tuning during the process of assembly and adjustment are very important.This paper introduces the primary mirror structure of the large-diameter optical collimator and its test method,presents the assembly and adjustment methods for optical systems with three different apertures,analyzes the primary mirror structure and tuning method of the Φ700 mm collimator,and uses 4D interferometer to detect the effects of assembling-adjusting device on surface shape.The results show that the assembling-adjusting device moves freely and the movement has no impact on the precision of surface shape,the pitch and rotation accuracies are better than 3″ and have six degrees of freedom.