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Sandia National Laboratory (P.O. Box 5800, Albuquerque, NM 87185) researchers are developing micromirrors that may eventually be part of the Next Generation Space Telescope (NGST), the successor to the Hubble telescope. In contrast to the Hubble, the NGST will be very sensitive to infrared radiation. With its large, light-gathering mirror and premier resolution, NGST will be capable of detecting faint infrared signals which are believed to be indicative of interstellar conditions 100 million to 1 billion years after the "big bang."
NASA approached Sandia about the development of prototype MEMS mirrors that could be a part of the NGST, which is scheduled for launch in 2008. Recently, an array of working mirrors was demonstrated at the NASA Goddard Space Flight Center (Greenbelt, MD) by engineers from Sandia. Arrays of mirrors, each 1,000 micron by 100 micron, with 1-micron gaps between adjacent mirrors, were lined up in rows of three. Each row tilted 10 in unison, which is considered a large angle for this design. The reported goal is to have 4 million of these independently moving mirrors in the NGST, along with a large light collecting mirror.
Micromirrors, which have been covered many times in MTN, are MEMS products that are being used extensively in projection displays, motion picture equipment, and other communications products. The mirrors used for this space application are fabricated by depositing thin films of polycrystalline ...