Chen YIWEI^1,2*, Miao ERLONG¹, Sui YONGXIN¹, and Yang HUAIJIANG¹

¹State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China
²University of Chinese Academy of Sciences, Beijing 100049, China

(Received June 25, 2014; Accepted August 25, 2014)

In this paper, we propose an annular subaperture stitching method based on an autocollimation method to relax the requirements on mechanical location accuracy. In this approach, we move a ball instead of the interferometer and the aspheric surface so that testing results for adjacent annular subapertures are registered. Thus, the stitching algorithm can easily stitch the subaperture testing results together when large mechanical location errors exist. To verify this new method, we perform a simulation experiment. The simulation results demonstrate that this method can stitch together the subaperture testing results under large mechanical location errors.

Key words: optical testing, aspheric optics, interferometer, annular subaperture stitching, autocollimation

^*E-mail address: cyw198788@163.com