Simulation and validation of a prototype swing arm profilometer for measuring extremely large telescope mirror-segments

Hongwei, J., King, C. and Walker, D.D. (2010) Simulation and validation of a prototype swing arm profilometer for measuring extremely large telescope mirror-segments. Optics Express. ISSN 1094-4087

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Abstract

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.

Item Type:	Article
Subjects:	T Technology > TS Manufactures
Schools:	School of Computing and Engineering School of Computing and Engineering > Centre for Precision Technologies
Related URLs:	Author
Depositing User:	Catherine Parker
Date Deposited:	01 Dec 2016 11:17
Last Modified:	31 Mar 2018 17:46
URI:	http://eprints.hud.ac.uk/id/eprint/30417

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