Testing a critical stray light path of the James Webb Space Telescope

Details Testing a critical stray light path of the James Webb Space Telescope Testing a critical stray light path of the James Webb Space Telescope

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7731e..15w&link_type=abstract

Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave. Edited by Oschmann, Jacobus M., Jr.; Clampin

Physics

Scientific paper

The James Webb Space Telescope (JWST) requires cryogenic testing of a critical stray light path, named as the Rogue Path. Although blockage of this path is verified during fabrication and assembly of JWST, simple small light sources added to the test configuration provide an opportunity to check for successful blockage at the system level in the cryogenic environment. Although the test occurs in the largest environmental chamber at the NASA Johnson Space Center, the size of the chamber challenges this test by placing the origin of the Rogue Path within the collimated beam of the telescope. The design of the test overcomes this challenge with sufficient signal to noise ratio and without interference with the optical test of the system.

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