Su Peng, Parks Robert E, Wang Lirong, Angel Roger P, Burge James H
College of Optical Sciences, The University of Arizona, Tucson, Arizona 85721, USA.
Appl Opt. 2010 Aug 10;49(23):4404-12. doi: 10.1364/AO.49.004404.
A software configurable optical test system (SCOTS) based on the geometry of the fringe reflection or phase measuring deflectometry method was developed for rapidly, robustly, and accurately measuring large, highly aspherical shapes such as solar collectors and primary mirrors for astronomical telescopes. In addition to using phase shifting methods for data collection and reduction, we explore the test from the point view of performing traditional optical testing methods, such as Hartmann or Hartmann-Shack tests, in a reverse way. Using this concept, the slope data calculation and unwrapping in the test can also be done with centroiding and line-scanning methods. These concepts expand the test to work in more general situations where fringe illumination is not practical. Experimental results show that the test can be implemented without complex calibration for many applications by taking the geometric advantage of working near the center curvature of the test part. The results also show that the test has a large dynamic range, can achieve measurement accuracy comparable with interferometric methods, and can provide a good complement to interferometric tests in certain circumstances. A variation of this method is also useful for measuring refractive optics and optical systems. As such, SCOTS provides optical manufacturers with a new tool for performing quantitative full field system evaluation.
基于条纹反射或相位测量偏折术方法的几何原理，开发了一种软件可配置光学测试系统（SCOTS），用于快速、稳健且准确地测量大型、高非球面形状，如太阳能集热器和天文望远镜的主镜。除了使用相移方法进行数据采集和处理外，我们还从以反向方式执行传统光学测试方法（如哈特曼或哈特曼 - 夏克测试）的角度来探索该测试。利用这一概念，测试中的斜率数据计算和展开也可以通过重心定位和线扫描方法来完成。这些概念扩展了测试的适用范围，使其能在条纹照明不实用的更一般情况下工作。实验结果表明，通过利用在测试部件中心曲率附近工作的几何优势，该测试在许多应用中无需复杂校准即可实现。结果还表明，该测试具有较大的动态范围，能够达到与干涉测量方法相当的测量精度，并且在某些情况下可以为干涉测量测试提供良好的补充。这种方法的一种变体对于测量折射光学器件和光学系统也很有用。因此，SCOTS为光学制造商提供了一种用于进行定量全场系统评估的新工具。
