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Proceedings Paper

Calculation of the effect of ice on the transmission of the James Webb Space Telescope
Author(s): Jonathan Arenberg
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Paper Abstract

The James Webb Space Telescope (JWST) has among its challenges the minimization of the effects of ice on its optical performance in terms of transmission. The ice is a result of JWST's architecture, mission design and materials selection. The optical properties of ice are introduced to illustrate why there is concern among JWST's designers about ice build up. Several alternate methods of determining the impact on mirror reflectance are compared. Two are derived from Beer's Law and the third is full thin film treatment. It is shown and argued that only the thin film method captures enough of the physics of interaction of the incident light with an ice coated mirror.

Paper Details

Date Published: 17 September 2007
PDF: 7 pages
Proc. SPIE 6692, Cryogenic Optical Systems and Instruments XII, 66920S (17 September 2007); doi: 10.1117/12.736281
Show Author Affiliations
Jonathan Arenberg, Northrop Grumman Space Technology (United States)

Published in SPIE Proceedings Vol. 6692:
Cryogenic Optical Systems and Instruments XII
James B. Heaney; Lawrence G. Burriesci, Editor(s)

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