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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
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Depositing User: Catherine Parker
Date Deposited: 01 Dec 2016 11:17
Last Modified: 01 Dec 2016 11:17
URI: http://eprints.hud.ac.uk/id/eprint/30417

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