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Proceedings Paper

A numerical evaluation of the correlation of surface cleanliness level and percent area coverage
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Paper Abstract

The correlation of surface cleanliness defined by MIL-STD-1246B and the resulting geometric obscuration, or percent area coverage (PAC), was rigorously calculated by Ma, Fong, and Lee in 1989. This correlation is effective for surfaces that follow a distribution of particle sizes defined by a slope of -0.926. This evaluation extends the correlation of surface cleanliness level and PAC to a more generalized format, compatible with alternative distribution slopes. In addition, an attempt at determining the distribution slope from a defined slope and cleanliness level is presented.

Paper Details

Date Published: 7 September 2006
PDF: 8 pages
Proc. SPIE 6291, Optical Systems Degradation, Contamination, and Stray Light: Effects, Measurements, and Control II, 62910L (7 September 2006); doi: 10.1117/12.679621
Show Author Affiliations
Radford L. Perry III, Swales Aerospace, Inc. (United States)


Published in SPIE Proceedings Vol. 6291:
Optical Systems Degradation, Contamination, and Stray Light: Effects, Measurements, and Control II
O. Manuel Uy; John C. Fleming; Michael G. Dittman, Editor(s)

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