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Proceedings Paper

General Contamination Criteria For Optical Surfaces
Author(s): James C. Bremer
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Paper Abstract

Contamination mechanisms such as particulate accretion, molecular film accretion, and impact cratering can degrade the quality of an optical surface by decreasing its throughput (transmissivity or reflectivity) and/or by increasing its total integrated scatter (TIS). The sensitivity of an optical sensor to a given contaminant species depends upon a number of factors, including the spectral passband of the sensor, the type of surface (mirror or lens, coated or uncoated, etc.), the relative intensities of signal and stray light, and the desired output of the system. A precise analysis of an instrument's contamination sensitivity must consider all of these factors. It is possible, however, to define "acceptable" levels of contamination as those which produce small throughput and TIS degradations in comparison to manufacturing defects and unavoidable environmental conditions. These criteria may be used to calculate a conservative value for the minimum separation between a spaceborne optical sensor and a contamination source such as a solid fuel rocket motor or a chemical release module.

Paper Details

Date Published: 19 February 1982
PDF: 10 pages
Proc. SPIE 0287, Shuttle Optical Environment, (19 February 1982); doi: 10.1117/12.932001
Show Author Affiliations
James C. Bremer, ORI, Inc. (United States)

Published in SPIE Proceedings Vol. 0287:
Shuttle Optical Environment
Giovanni G. Fazio; Edgar Miller, Editor(s)

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