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Optical Engineering

Long-wave infrared digital holographic interferometry with diffuser or point source illuminations for measuring deformations of aspheric mirrors
Author(s): Jean-François Vandenrijt; Cédric Thizy; Patrick Queeckers; Frank Dubois; Dominic Doyle; Marc P. Georges
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Paper Abstract

Long-wave infrared digital holographic interferometry with CO2 laser and microbolometer arrays has been developed for testing the large deformations of space reflectors. The setup considered is a Mach–Zehnder, associated to the digital holography reconstruction of the wavefront in the inline configuration with phase shifting. Two possibilities exist for illuminating the tested reflector: either with a point source (similarly to classical interferometry) or an extended source (with a diffuser). This paper presents the development of a modular setup which allows comparing both in the case of a parabolic mirror.

Paper Details

Date Published: 28 April 2014
PDF: 9 pages
Opt. Eng. 53(11) 112309 doi: 10.1117/1.OE.53.11.112309
Published in: Optical Engineering Volume 53, Issue 11
Show Author Affiliations
Jean-François Vandenrijt, Univ. de Liège (Belgium)
Cédric Thizy, Univ. de Liège (Belgium)
Patrick Queeckers, Univ. Libre de Bruxelles (Belgium)
Frank Dubois, Univ. Libre de Bruxelles (Belgium)
Dominic Doyle, European Space Research and Technology Ctr. (Netherlands)
Marc P. Georges, Univ. de Liège (Belgium)


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