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Published August 10, 2010 | Published
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The JWST/NIRCam coronagraph flight occulters

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.

Additional Information

© 2010 Society of Photo-optical Instrumentation Engineers (SPIE). This analysis was performed at the Jet Propulsion Laboratory/Cal. Inst. of Technology and funded by the NIRCam instrument project and science team.

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August 19, 2023
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