28 April 2014 Long-wave infrared digital holographic interferometry with diffuser or point source illuminations for measuring deformations of aspheric mirrors
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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.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Jean-François Vandenrijt, Cédric Thizy, Patrick Queeckers, Frank Dubois, Dominic Doyle, 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 . Submission:
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