Long-wave infrared digital holographic interferometry with diffuser or point source illuminations for measuring deformations of aspheric mirrors

Jean-François Vandenrijt; Cédric Thizy; Patrick Queeckers; Frank Dubois; Dominic Doyle; Marc P. Georges

doi:10.1117/1.OE.53.11.112309

28 April 2014 Long-wave infrared digital holographic interferometry with diffuser or point source illuminations for measuring deformations of aspheric mirrors

Jean-François Vandenrijt, Cédric Thizy, Patrick Queeckers, Frank Dubois, Dominic Doyle, Marc P. Georges

Author Affiliations +

Optical Engineering, Vol. 53, Issue 11, 112309 (April 2014). https://doi.org/10.1117/1.OE.53.11.112309

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.

Citation Download Citation

Jean-François Vandenrijt, Cédric Thizy, Patrick Queeckers, Frank Dubois, Dominic Doyle, and Marc P. Georges "Long-wave infrared digital holographic interferometry with diffuser or point source illuminations for measuring deformations of aspheric mirrors," Optical Engineering 53(11), 112309 (28 April 2014). https://doi.org/10.1117/1.OE.53.11.112309

Published: 28 April 2014

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