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Proceedings Paper

Cryogenic measurements of the dichroic beam splitter for the NIRCam instrument
Author(s): Yalan Mao; Lynn W. Huff; Warren Hendricks; Charles Kennemore
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Paper Abstract

The Dichroic Beam Splitter (DBS) in the NIRCam instrument is required to have small reflected wavefront error and high throughput in order for the instrument to view the images of first light in the Universe in the James Webb Space Telescope (JWST). The operating temperature of the instrument is from 32 Kelvin to 39.5 Kelvin. We have performed NIRCam prototype DBS (fabricated by JDS Uniphase) spectral and reflected wavefront error measurements at cryogenic temperatures. We report the experiment and the results in this paper.

Paper Details

Date Published: 17 September 2007
PDF: 8 pages
Proc. SPIE 6692, Cryogenic Optical Systems and Instruments XII, 66920H (17 September 2007); doi: 10.1117/12.742096
Show Author Affiliations
Yalan Mao, Lockheed Martin Advanced Technology Ctr. (United States)
Lynn W. Huff, Lockheed Martin Advanced Technology Ctr. (United States)
Warren Hendricks, JDS Uniphase Corp. (United States)
Charles Kennemore, JDS Uniphase Corp. (United States)

Published in SPIE Proceedings Vol. 6692:
Cryogenic Optical Systems and Instruments XII
James B. Heaney; Lawrence G. Burriesci, Editor(s)

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