5 August 2010 Hardware results for the Wide-field Infrared Survey Explorer (WISE) telescope and scanner
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On December 14, 2009 NASA launched the Wide-field Infrared Survey Explorer (WISE), a NASA MIDEX mission within the Explorers program that is currently performing an all-sky survey in four infrared bands. L-3 Integrated Optical Systems/SSG designed, built, and tested the telescope, scanner, and aft imaging optical system for WISE under contract to the Space Dynamics Laboratory. Hardware and test results for those subsystems are presented, as well as an on-orbit status of their imaging performance. The WISE payload includes a 40 cm afocal telescope, a scan mirror for back-scan during integration, and an aft optics imager assembly. All modules operate below 17 Kelvin. The allreflective system uses aluminum mirrors and metering structures. The afocal telescope provides distortion control to better than two parts in a thousand to prevent image blur during internal scanning. The 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 five-mirror imaging optics module follows the scan mirror and feeds dichroic beamsplitters that separate the energy into four channels between 2.8 and 26 microns. Once initial on-orbit checkout and calibration was completed, WISE began a 6-month mission performing an all-sky survey in the four infrared bands, which is over 80% complete as of June 2010.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mark Schwalm, Alan Akerstrom, Mark Barry, Jim Guregian, Mark Larsen, Peter Laquidara, Jack Regan, Virginia Ugolini, "Hardware results for the Wide-field Infrared Survey Explorer (WISE) telescope and scanner", Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77310Y (5 August 2010); doi: 10.1117/12.857499; https://doi.org/10.1117/12.857499


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