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Proceedings Paper

Cryogenic telescope, scanner, and imaging optics for the wide-field infrared survey explorer (WISE)
Author(s): Mark Schwalm; Mark Barry; Gerry Perron; Deepak Sampath; Francis LaMalva; James J. Guregian; Blake Crowther
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Paper Abstract

The Wide-field Infrared Survey Explorer (WISE) instrument includes a cryogenic telescope, scanner, and imaging optics module that provides four channels of infrared imaging between 2.8 and 26 microns. The telescope is a 40 cm aperture reflecting five-mirror imager/collimator relay that provides 8X demagnification, a 47 x 86 arcminute field of regard, and a real exit pupil for scanning. It also provides distortion control to better than one part in a thousand to prevent image blur during internal scanning. A one-axis scan mirror at the exit pupil scans the detectors' field-of-view across the telescope field-of-regard, countering the orbital motion and freezing the line of sight during the multi-second exposure period. The imaging optics module is a five-mirror re-imager with dichroic beamsplitters that separate the energy into four channels. All modules operate below 17 Kelvin. The all-reflective system uses aluminum mirrors and metering structures. The scanner is a derivative of the SPIRIT III scanner flown previously. WISE has been selected by NASA for Phase B design.

Paper Details

Date Published: 18 August 2005
PDF: 7 pages
Proc. SPIE 5904, Cryogenic Optical Systems and Instruments XI, 59040K (18 August 2005); doi: 10.1117/12.617653
Show Author Affiliations
Mark Schwalm, SSG Precision Optronics, Inc. (United States)
Mark Barry, SSG Precision Optronics, Inc. (United States)
Gerry Perron, SSG Precision Optronics, Inc. (United States)
Deepak Sampath, SSG Precision Optronics, Inc. (United States)
Francis LaMalva, SSG Precision Optronics, Inc. (United States)
James J. Guregian, SSG Precision Optronics, Inc. (United States)
Blake Crowther, Utah State Univ. Research Foundation (United States)


Published in SPIE Proceedings Vol. 5904:
Cryogenic Optical Systems and Instruments XI
James B. Heaney; Lawrence G. Burriesci, Editor(s)

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