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Proceedings Paper

Pathfinder experiment on particulates after jet spray
Author(s): Werner V. Brandt; Wilfried Krone-Schmidt; Ronald V. Peterson
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Paper Abstract

The location of particulates in and about a telescope assembly after jet spray cleaning of a contaminated primary mirror surface under vacuum conditions is determined. The Pathfinder experiment described here is designed to track both the location and level of residual particulate contamination in a simulated telescope assembly after jet spray. Silicon witness plates at various positions in the telescope mockup are used to track remaining contamination after jet spray cleaning of a severely contaminated primary mirror. Scatter measurement at a wavelength of 0.5145 microns is used to determine the contamination level of the silicon witness plates before and after jet spray cleaning. Analysis of scatter and visual particle counting data demonstrated that 99.99 percent of particles are removed. Residual particles levels inside the tube are determined to be on the order of background levels.

Paper Details

Date Published: 18 December 1992
PDF: 8 pages
Proc. SPIE 1754, Optical System Contamination: Effects, Measurement, Control III, (18 December 1992); doi: 10.1117/12.140742
Show Author Affiliations
Werner V. Brandt, Hughes Aircraft Co. (United States)
Wilfried Krone-Schmidt, Hughes Aircraft Co. (United States)
Ronald V. Peterson, Hughes Aircraft Co. (United States)

Published in SPIE Proceedings Vol. 1754:
Optical System Contamination: Effects, Measurement, Control III
A. Peter M. Glassford, Editor(s)

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