The JWST/NIRCam coronagraph flight occulters

John E. Krist; Kunjithapatham Balasubramanian; Richard E. Muller; Stuart B. Shaklan; Douglas M. Kelly; Daniel W. Wilson; Charles A. Beichman; Eugene Serabyn; Yalan Mao; Pierre M. Echternach; John T. Trauger; Kurt M. Liewer

doi:10.1117/12.856488

10 August 2010 The JWST/NIRCam coronagraph flight occulters

John E. Krist, Kunjithapatham Balasubramanian, Richard E. Muller, Stuart B. Shaklan, Douglas M. Kelly, Daniel W. Wilson, Charles A. Beichman, Eugene Serabyn, Yalan Mao, Pierre M. Echternach, John T. Trauger, Kurt M. Liewer

Author Affiliations +

Proceedings Volume 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave; 77313J (2010) https://doi.org/10.1117/12.856488
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

The NIRCam instrument on the James Webb Space Telescope will have a Lyot coronagraph for high contrast imaging of extrasolar planets and circumstellar disks at λ=2 - 5 μm. Half-tone patterns are used to create graded-transmission image plane masks. These are generated using electron beam lithography and reactive ion etching of a metal layer on an antireflection coated sapphire substrate. We report here on the manufacture and evaluation of the flight occulters.

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John E. Krist, Kunjithapatham Balasubramanian, Richard E. Muller, Stuart B. Shaklan, Douglas M. Kelly, Daniel W. Wilson, Charles A. Beichman, Eugene Serabyn, Yalan Mao, Pierre M. Echternach, John T. Trauger, and Kurt M. Liewer "The JWST/NIRCam coronagraph flight occulters", Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77313J (10 August 2010); https://doi.org/10.1117/12.856488

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