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Proceedings Paper

Optical design of the camera for Transiting Exoplanet Survey Satellite (TESS)
Author(s): Michael Chrisp; Kristin Clark; Brian Primeau; Michael Dalpiaz; Joseph Lennon
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Paper Abstract

The optical design of the wide field of view refractive camera with a 34 degree diagonal field for the TESS payload is described. This fast f/1.4 cryogenic camera, operating at -75°C, has no vignetting for maximum light gathering within the size and weight constraints. Four of these cameras capture full frames of star images for photometric searches of planet crossings. The optical design evolution, from the initial Petzval design, takes advantage of Forbes aspheres to develop a hybrid design form. This maximizes the correction from the two aspherics resulting in a reduction of average spot size by sixty percent in the final design. An external long wavelength pass filter has been replaced by an internal filter coating on a lens to save weight, and has been fabricated to meet the specifications. The stray light requirements are met by an extended lens hood baffle design, giving the necessary off-axis attenuation.

Paper Details

Date Published: 22 September 2015
PDF: 7 pages
Proc. SPIE 9602, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VII, 96020C (22 September 2015); doi: 10.1117/12.2188005
Show Author Affiliations
Michael Chrisp, MIT Lincoln Lab. (United States)
Kristin Clark, MIT Lincoln Lab. (United States)
Brian Primeau, MIT Lincoln Lab. (United States)
Michael Dalpiaz, MIT Lincoln Lab. (United States)
Joseph Lennon, MIT Lincoln Lab. (United States)

Published in SPIE Proceedings Vol. 9602:
UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VII
Howard A. MacEwen; James B. Breckinridge, Editor(s)

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