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Proceedings Paper

Scanning pentaprism measurements of off-axis aspherics II
Author(s): Peng Su; James H. Burge; Brian Cuerden; Richard Allen; Hubert M. Martin
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Paper Abstract

The scanning pentaprism test has provided an important absolute test method for flat mirrors, parabolic mirrors and also collimation systems. We have developed a scanning pentaprism system to measure off-axis paraboloidal mirrors such as those for the Giant Magellan Telescope (GMT) primary mirror. Special characteristics of the pentaprism testing of an off-axis mirror are discussed in the paper. We provide performance results for the final measurement of a 1.7 m off-axis parabolic mirror and present a technique used to determine the radius of the parent, off-axis distance and the clocking of the mirror from the data from the scanning pentaprism system.

Paper Details

Date Published: 22 August 2009
PDF: 9 pages
Proc. SPIE 7426, Optical Manufacturing and Testing VIII, 74260Y (22 August 2009); doi: 10.1117/12.828497
Show Author Affiliations
Peng Su, College of Optical Sciences, The Univ. of Arizona (United States)
James H. Burge, College of Optical Sciences, The Univ. of Arizona (United States)
Steward Observatory, The Univ. of Arizona (United States)
Brian Cuerden, Steward Observatory, The Univ. of Arizona (United States)
Richard Allen, Steward Observatory, The Univ. of Arizona (United States)
Hubert M. Martin, Steward Observatory, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 7426:
Optical Manufacturing and Testing VIII
James H. Burge; Oliver W. Fähnle; Ray Williamson, Editor(s)

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