@inproceedings{607544968d8b4d46954917159c9223af,
title = "The JWST/NIRCam coronagraph: Mask design and fabrication",
abstract = "The NIRCam instrument on the James Webb Space Telescope will provide coronagraphic imaging from λ =1-5 μm of high contrast sources such as extrasolar planets and circumstellar disks. A Lyot coronagraph with a variety of circular and wedge-shaped occulting masks and matching Lyot pupil stops will be implemented. The occulters approximate grayscale transmission profiles using halftone binary patterns comprising wavelength-sized metal dots on anti-reflection coated sapphire substrates. The mask patterns are being created in the Micro Devices Laboratory at the Jet Propulsion Laboratory using electron beam lithography. Samples of these occulters have been successfully evaluated in a coronagraphic testbed. In a separate process, the complex apertures that form the Lyot stops will be deposited onto optical wedges. The NIRCam coronagraph flight components are expected to be completed this year.",
keywords = "JWST, James Webb Space Telescope, NIRCam, coronagraph",
author = "Krist, {John E.} and Kunjithapatham Balasubramanian and Beichman, {Charles A.} and Echternach, {Pierre M.} and Green, {Joseph J.} and Liewer, {Kurt M.} and Muller, {Richard E.} and Eugene Serabyn and Shaklan, {Stuart B.} and Trauger, {John T.} and Wilson, {Daniel W.} and Horner, {Scott D.} and Yalan Mao and Somerstein, {Stephen F.} and Gopal Vasudevan and Kelly, {Douglas M.} and Rieke, {Marcia J.}",
year = "2009",
doi = "10.1117/12.826448",
language = "English (US)",
isbn = "9780819477309",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Techniques and Instrumentation for Detection of Exoplanets IV",
note = "Techniques and Instrumentation for Detection of Exoplanets IV ; Conference date: 04-08-2009 Through 05-08-2009",
}