Cryogenic measurements of the dichroic beam splitter for the NIRCam instrument

Details Cryogenic measurements of the dichroic beam splitter for the NIRCam instrument Cryogenic measurements of the dichroic beam splitter for the NIRCam instrument

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007spie.6692e..12m&link_type=abstract

Cryogenic Optical Systems and Instruments XII. Edited by Heaney, James B.; Burriesci, Lawrence G.. Proceedings of the SPIE, Volu

Physics

Scientific paper

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.

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