28 September 2011 NIRCam coronagraphic Lyot stop: design, fabrication, and testing
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Abstract
The NIRCam instrument on the James Webb Space Telescope (JWST) will provide a coronagraphic imaging capability to search for extrasolar planets in the 2 - 5 microns wavelength range. This capability is realized by a set of Lyot pupil stops with patterns matching the occulting mask located in the JWST intermediate focal plane in the NIRCam optical system. The complex patterns with transparent apertures are made by photolithographic process using a metal coating in the opaque region. The optical density needs to be high for the opaque region, and transmission needs to be high at the aperture. In addition, the Lyot stop needs to operate under cryogenic conditions. We will report on the Lyot stop design, fabrication and testing in this paper.
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Yalan Mao, Yalan Mao, Torben B. Andersen, Torben B. Andersen, Tracy Kubo, Tracy Kubo, Miguel Virgen, Miguel Virgen, Henry Chan, Henry Chan, Greg Feller, Greg Feller, Lynn W. Huff, Lynn W. Huff, Eric Smith, Eric Smith, Gopal Vasudevan, Gopal Vasudevan, Steve Somerstein, Steve Somerstein, Tom Jamieson, Tom Jamieson, Scott Horner, Scott Horner, John Krist, John Krist, Charles A. Beichman, Charles A. Beichman, Carmen Barone, Carmen Barone, Ron Schmidt, Ron Schmidt, Donna Levin, Donna Levin, Steve Seymour, Steve Seymour, Douglas Kelly, Douglas Kelly, Marcia J. Rieke, Marcia J. Rieke, } "NIRCam coronagraphic Lyot stop: design, fabrication, and testing", Proc. SPIE 8150, Cryogenic Optical Systems and Instruments XIII, 81500E (28 September 2011); doi: 10.1117/12.896451; https://doi.org/10.1117/12.896451
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