James Webb Space Telescope stray light performance status update

Paul A. Lightsey; Zongying Wei

doi:10.1117/12.924852

21 September 2012 James Webb Space Telescope stray light performance status update

Paul A. Lightsey, Zongying Wei

Proceedings Volume 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave; 84423B (2012) https://doi.org/10.1117/12.924852
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The James Webb Space Telescope (JWST) is a large space based astronomical telescope that will operate at cryogenic temperatures. The architecture has the telescope exposed to space, with a large sun shield providing thermal isolation and protection from direct illumination from the sun. The instruments will have the capability to observe over a spectral range from 0.6 µm to 28 µm wavelengths. The following paper will present updated stray light analysis results characterizing the stray light getting to the instrument focal planes from the full galactic sky, zodiacal background, bright objects near the line of sight, and scattered earth and moon shine. Included is a discussion of internal alignments of pupils at relevant interface planes to stray light. The amount of self-generated infrared background from the Observatory that reaches the instrument focal planes will be presented including the tolerance to the alignment of the edges of the sun shield membranes relative to each other and the telescope.

Citation Download Citation

Paul A. Lightsey and Zongying Wei "James Webb Space Telescope stray light performance status update", Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84423B (21 September 2012); https://doi.org/10.1117/12.924852

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