Simulation and validation of a prototype swing arm profilometer for measuring extremely large telescope mirror-segments.
Simulation and validation of a prototype swing arm profilometer for measuring extremely large telescope mirror-segments.
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DOI：
10.1364/oe.18.002036
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发表时间：
2010-02
期刊：
影响因子：
3.8
通讯作者：
Hongwei Jing;C. King;D. Walker
中科院分区：
文献类型：
--
作者：
Hongwei Jing;C. King;D. Walker
极大望远镜（ELT）项目的前提是分段主镜。离轴非球面段的计量在全局形式、中间空间频率以及基半径和圆锥常数的匹配方面特别具有挑战性。我们建议使用摆臂轮廓仪（SAP）提供独立的干涉验证。在本文中，我们提出的摆臂轮廓仪的模拟结果，适用于反射镜段，和实验验证的模拟使用的原型仪器。
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.