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Proceedings Paper

NIRCam coronagraphic Lyot stop: design, fabrication, and testing
Author(s): Yalan Mao; Torben B. Andersen; Tracy Kubo; Miguel Virgen; Henry Chan; Greg Feller; Lynn W. Huff; Eric Smith; Gopal Vasudevan; Steve Somerstein; Tom Jamieson; Scott Horner; John Krist; Charles A. Beichman; Carmen Barone; Ron Schmidt; Donna Levin; Steve Seymour; Douglas Kelly; Marcia J. Rieke
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Paper 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.

Paper Details

Date Published: 28 September 2011
PDF: 12 pages
Proc. SPIE 8150, Cryogenic Optical Systems and Instruments XIII, 81500E (28 September 2011); doi: 10.1117/12.896451
Show Author Affiliations
Yalan Mao, Lockheed Martin Space Systems Co. (United States)
Torben B. Andersen, Lockheed Martin Space Systems Co. (United States)
Tracy Kubo, Lockheed Martin Space Systems Co. (United States)
Miguel Virgen, Lockheed Martin Space Systems Co. (United States)
Henry Chan, Lockheed Martin Space Systems Co. (United States)
Greg Feller, Lockheed Martin Space Systems Co. (United States)
Lynn W. Huff, Lockheed Martin Space Systems Co. (United States)
Eric Smith, Lockheed Martin Space Systems Co. (United States)
Gopal Vasudevan, Lockheed Martin Space Systems Co. (United States)
Steve Somerstein, Lockheed Martin Space Systems Co. (United States)
Tom Jamieson, Lockheed Martin Space Systems Co. (United States)
Scott Horner, NASA Ames Research Ctr. (United States)
John Krist, Jet Propulsion Lab. (United States)
Charles A. Beichman, Jet Propulsion Lab. (United States)
Carmen Barone, Max Levy Autograph, Inc. (United States)
Ron Schmidt, Max Levy Autograph, Inc. (United States)
Donna Levin, Max Levy Autograph, Inc. (United States)
Steve Seymour, Max Levy Autograph, Inc. (United States)
Douglas Kelly, Steward Observatory, The Univ. of Arizona (United States)
Marcia J. Rieke, Steward Observatory, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 8150:
Cryogenic Optical Systems and Instruments XIII
James B. Heaney; E. Todd Kvamme, Editor(s)

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