Paper
22 September 2015 Optical design of the camera for Transiting Exoplanet Survey Satellite (TESS)
Michael Chrisp, Kristin Clark, Brian Primeau, Michael Dalpiaz, Joseph Lennon
Author Affiliations +
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 An external long wavelength pass filter has been replaced by an internal filter coating on a lens to save weight, and has been fabricated to meet the specifications.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.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael Chrisp, Kristin Clark, Brian Primeau, Michael Dalpiaz, and Joseph Lennon "Optical design of the camera for Transiting Exoplanet Survey Satellite (TESS)", Proc. SPIE 9602, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VII, 96020C (22 September 2015); https://doi.org/10.1117/12.2188005
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KEYWORDS
Cameras

Aspheric lenses

Coating

Optical design

Optical filters

Stray light

Prototyping

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