Digital holographic interferometry in the long-wave infrared and temporal phase unwrapping for measuring large deformations and rigid body motions of segmented space detector in cryogenic test

Jean-François Vandenrijt; Cédric Thizy; Laurent Martin; Florent Beaumont; José Garcia; Christophe Fabron; Éric Prieto; Thierry Maciaszek; Marc P. Georges

doi:10.1117/1.OE.55.12.121723

12 August 2016 Digital holographic interferometry in the long-wave infrared and temporal phase unwrapping for measuring large deformations and rigid body motions of segmented space detector in cryogenic test

Jean-François Vandenrijt, Cédric Thizy, Laurent Martin, Florent Beaumont, José Garcia, Christophe Fabron, Éric Prieto, Thierry Maciaszek, Marc P. Georges

Author Affiliations +

Optical Engineering, Vol. 55, Issue 12, 121723 (August 2016). https://doi.org/10.1117/1.OE.55.12.121723

Abstract

We present digital holographic interferometry (DHI) in the long-wave infrared for monitoring the deformation under cryogenic conditions of a segmented focal plane array to be used in a space mission. The long wavelength was chosen for its ability to allow measurement of displacements 20 times larger than DHI in the visible, which were foreseen with the test object under large temperature variations. The latter is a mosaic of 4×4 detectors assembled on a frame. DHI was required to assess the global deformation of the assembly, the deformation of each detector, and out-of-plane movements of each of them with respect to their neighbors. For that reason, we incorporated the temporal phase unwrapping by capturing a sufficiently high number of holograms between which the phase does not undergo large variations. At last, since the specimen exhibits specular reflectivity at that wavelength, it is illuminated by means of a reflective diffuser.

Citation Download Citation

Jean-François Vandenrijt, Cédric Thizy, Laurent Martin, Florent Beaumont, José Garcia, Christophe Fabron, Éric Prieto, Thierry Maciaszek, and Marc P. Georges "Digital holographic interferometry in the long-wave infrared and temporal phase unwrapping for measuring large deformations and rigid body motions of segmented space detector in cryogenic test," Optical Engineering 55(12), 121723 (12 August 2016). https://doi.org/10.1117/1.OE.55.12.121723

Published: 12 August 2016

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available