Cryogenic measurements of the dichroic beam splitter for the NIRCam instrument

Yalan Mao; Lynn W. Huff; Warren Hendricks; Charles Kennemore

doi:10.1117/12.742096

17 September 2007 Cryogenic measurements of the dichroic beam splitter for the NIRCam instrument

Yalan Mao, Lynn W. Huff, Warren Hendricks, Charles Kennemore

Proceedings Volume 6692, Cryogenic Optical Systems and Instruments XII; 66920H (2007) https://doi.org/10.1117/12.742096
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

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.

Citation Download Citation

Yalan Mao, Lynn W. Huff, Warren Hendricks, and Charles Kennemore "Cryogenic measurements of the dichroic beam splitter for the NIRCam instrument", Proc. SPIE 6692, Cryogenic Optical Systems and Instruments XII, 66920H (17 September 2007); https://doi.org/10.1117/12.742096

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