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在反射光学系统中大多采用凸非球面,但凸非球面的加工和检验一直是比较困难的问题。利用透射凸二次非球面具有自消像差的能力,从三级像差理论出发,提出了凸二次非球面的透射式自准检验和反射式自准检验两种方案,解决了采用Hindle球检验口径过大的问题。以某型号准600R蛳C系统的凸次镜为例,分析了加工过程中的检验精度,并和Hindle球检验方法进行比较。结果表明,凸非球面的自准检验是一种切实可行的高精度检验方法。
In reflective optical systems, most convex aspheric surfaces are used, but the processing and testing of convex aspheric surfaces has been a rather difficult issue. Based on the third-order aberration theory, two schemes of transmission aspheric self-check and reflective self-check of convex secondary aspheric are proposed by using the ability of transmitting convex aspheric surface to eliminate self-quasi- Ball test caliber problem. Taking the convex secondary mirror of a standard 600R 蛳 C system as an example, the accuracy of the inspection during the machining process is analyzed and compared with the Hindle ball test method. The results show that the convex aspheric self-calibration test is a feasible high-precision test method.