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Proceedings Paper

Assembly, alignment and test of the Transiting Exoplanet Survey Satellite (TESS) optical assemblies
Author(s): Gregory Balonek; Joshua J. Brown; James E. Andre; Christian D. Chesbrough; Michael P. Chrisp; Michael Dalpiaz; Joseph Lennon; B. C. Richards; Kristin E. Clark
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Paper Abstract

The Transiting Exoplanet Survey Satellite (TESS) will carry four visible waveband, seven-element, refractive F/1.4 lenses, each with a 34 degree diagonal field of view. This paper describes the methods used for the assembly, alignment and test of the four flight optical assemblies. Prior to commencing the build of the four flight optical assemblies, a Risk Reduction Unit (RRU) was successfully assembled and tested [1]. The lessons learned from the RRU were applied to the build of the flight assemblies. The main modifications to the flight assemblies include the inking of the third lens element stray light mitigation, tighter alignment tolerances, and diamond turning for critical mechanical surfaces. Each of the optical assemblies was tested interferometrically and measured with a low coherence distance measuring interferometer (DMI) to predict the optimal shim thickness between the lens assembly and detector before -75°C environmental testing. In addition to individual test data, environmental test results from prior assemblies allow for the exploration of marginal performance differences between each of the optical assemblies.

Paper Details

Date Published: 22 August 2017
PDF: 11 pages
Proc. SPIE 10377, Optical System Alignment, Tolerancing, and Verification XI, 103770J (22 August 2017); doi: 10.1117/12.2275882
Show Author Affiliations
Gregory Balonek, MIT Lincoln Lab. (United States)
Joshua J. Brown, MIT Lincoln Lab. (United States)
James E. Andre, MIT Lincoln Lab. (United States)
Christian D. Chesbrough, MIT Lincoln Lab. (United States)
Michael P. Chrisp, MIT Lincoln Lab. (United States)
Michael Dalpiaz, MIT Lincoln Lab. (United States)
Joseph Lennon, MIT Lincoln Lab. (United States)
B. C. Richards, MIT Lincoln Lab. (United States)
Kristin E. Clark, MIT Lincoln Lab. (United States)

Published in SPIE Proceedings Vol. 10377:
Optical System Alignment, Tolerancing, and Verification XI
José Sasián; Richard N. Youngworth, Editor(s)

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