Chen Shanyong, Li Shengyi, Dai Yifan, Zheng Ziwen
College of Mechatronic Engineering and Automation, National University of Defense Technology, Deya Road, Changsha, Hunan, China.
Appl Opt. 2007 Jun 10;46(17):3504-9. doi: 10.1364/ao.46.003504.
Based on our previously proposed subaperture stitching and localization (SASL) algorithm, we present strategies and a prototype for testing of large optical surfaces with subaperture stitching. First, several strategies are introduced to deal with new problems when applying the SASL algorithm to large surfaces. The uncertainty of the lateral scale of the interferometer is compensated in the same manner as that of the radii of best-fit spheres in the algorithm. Then the coarse-fine stitching strategy is proposed to stitch tens of subapertures efficiently. Second, a prototype for testing of large surfaces with subaperture stitching is developed with a welded structural base. The model of kinematics is built to determine the initial configuration of each subaperture, according to the records of nulling motion. The uncertainty of linear motion is required to be no more than 1 mm, taking advantage of the large range of convergence of the SASL algorithm. Finally we present an experiment to verify the validity of the method and the prototype. A spherical surface is tested and successfully stitched with 37 subapertures.
基于我们之前提出的子孔径拼接与定位（SASL）算法，我们提出了用于大尺寸光学表面子孔径拼接测试的策略和原型。首先，介绍了几种在将SASL算法应用于大尺寸表面时处理新问题的策略。干涉仪横向尺度的不确定性以与算法中最佳拟合球体半径相同的方式进行补偿。然后提出了粗-精拼接策略，以有效地拼接数十个子孔径。其次，开发了一个带有焊接结构底座的大尺寸表面子孔径拼接测试原型。根据调零运动记录建立运动学模型，以确定每个子孔径的初始配置。利用SASL算法的大收敛范围，要求线性运动的不确定性不超过1毫米。最后，我们给出一个实验来验证该方法和原型的有效性。对一个球面进行了测试，并成功地用37个子孔径进行了拼接。
