Stray light performance for the James Webb Space Telescope

Paul A. Lightsey; Zongying Wei; Dennis L. Skelton; Charles W. Bowers; Kimberly I. Mehalick; Shaun R. Thomson; Perry Knollenberg; Jonathan W. Arenberg

doi:10.1117/12.2055485

28 August 2014 Stray light performance for the James Webb Space Telescope

Paul A. Lightsey, Zongying Wei, Dennis L. Skelton, Charles W. Bowers, Kimberly I. Mehalick, Shaun R. Thomson, Perry Knollenberg, Jonathan W. Arenberg

Author Affiliations +

Proceedings Volume 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave; 91433P (2014) https://doi.org/10.1117/12.2055485
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The James Webb Space Telescope (JWST) is a large cryogenic telescope observing over a spectral range from 0.6 μm to 29 μm. A large sun shield blocks sunlight and provides thermal isolation for the optics. Analyses characterizing the stray light reaching the instrument focal planes from the galactic sky, zodiacal background, bright objects near the line-of-sight, and earth and moon shine are presented along with the self-generated thermal infrared background from Observatory structures. The latter requires thermal analysis to characterize the Observatory temperatures. Dependencies on the surface properties of BRDF and emittance are discussed for the underlying materials and the effects of contamination

Citation Download Citation

Paul A. Lightsey, Zongying Wei, Dennis L. Skelton, Charles W. Bowers, Kimberly I. Mehalick, Shaun R. Thomson, Perry Knollenberg, and Jonathan W. Arenberg "Stray light performance for the James Webb Space Telescope", Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91433P (28 August 2014); https://doi.org/10.1117/12.2055485

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