Cryogenic telescope, scanner, and imaging optics for the Wide-field Infrared Survey Explorer (WISE)

Mark Schwalm; Mark Barry; Gerry Perron; Deepak Sampath; Francis LaMalva; James J. Guregian; Blake Crowther

doi:10.1117/12.617653

18 August 2005 Cryogenic telescope, scanner, and imaging optics for the wide-field infrared survey explorer (WISE)

Mark Schwalm, Mark Barry, Gerry Perron, Deepak Sampath, Francis LaMalva, James J. Guregian, Blake Crowther

Proceedings Volume 5904, Cryogenic Optical Systems and Instruments XI; 59040K (2005) https://doi.org/10.1117/12.617653
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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.

Citation Download Citation

Mark Schwalm, Mark Barry, Gerry Perron, Deepak Sampath, Francis LaMalva, James J. Guregian, and Blake Crowther "Cryogenic telescope, scanner, and imaging optics for the wide-field infrared survey explorer (WISE)", Proc. SPIE 5904, Cryogenic Optical Systems and Instruments XI, 59040K (18 August 2005); https://doi.org/10.1117/12.617653

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