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Optical Design of the Camera for Transiting Exoplanet Survey Satellite (TESS)The optical design of the wide field of view refractive camera, 34 degrees 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, took advantage of Forbes aspheres to develop a hybrid design form. This maximized 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 was replaced by an internal filter coating on a lens to save weight, and has been fabricated to meet the specifications. The stray light requirements were met by an extended lens hood baffle design, giving the necessary off-axis attenuation.
Document ID
20150018419
Document Type
Conference Paper
Authors
Chrisp, Michael (Massachusetts Inst. of Tech. Lexington, MA, United States)
Clark, Kristin (Massachusetts Inst. of Tech. Lexington, MA, United States)
Primeau, Brian (Massachusetts Inst. of Tech. Lexington, MA, United States)
Dalpiaz, Michael (Massachusetts Inst. of Tech. Lexington, MA, United States)
Lennon, Joseph (Massachusetts Inst. of Tech. Lexington, MA, United States)
Date Acquired
September 28, 2015
Publication Date
August 9, 2015
Subject Category
Instrumentation and Photography
Report/Patent Number
GSFC-E-DAA-TN24786
Meeting Information
SPIE(San Diego, CA)
Funding Number(s)
CONTRACT_GRANT: FA8721-05-C-0002
CONTRACT_GRANT: NNG13FG02I
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
CCD
TESS

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