Jing Hongwei, King Christopher, Walker David
Institute of Optics and Electronics, Chinese Academy of Sciences, P.O .Box 350, Chengdu 610209, China.
Opt Express. 2010 Feb 1;18(3):2036-48. doi: 10.1364/OE.18.002036.
The Extremely Large Telescope (ELT) projects presuppose segmented primary mirrors. The metrology of the off-axis aspherical segments is particularly challenging in terms of global form, mid spatial frequencies and matching of the base-radius and conic constant. We propose to use a swing arm profilometer (SAP) to provide verification independent of interferometry. In this paper we present results of a simulation of the swing arm profilometer as applied to mirror segments, and experimental verification of the simulation using a prototype instrument.
极大望远镜（ELT）项目以分段式主镜为前提。离轴非球面镜段的计量在整体形状、中频空间频率以及基半径和二次常数匹配方面极具挑战性。我们提议使用摆臂轮廓仪（SAP）来提供独立于干涉测量法的验证。在本文中，我们展示了将摆臂轮廓仪应用于镜段的模拟结果，以及使用原型仪器对该模拟进行的实验验证。
