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Proceedings Paper

The Scratch Standard Is Only A Cosmetic Standard
Author(s): Matt Young
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Paper Abstract

In this paper, I present a history of the scratch-and-dig standard for optical surface quality and show that this standard has since its inception been recognized as a cosmetic standard and not as an objective or performance standard. In addition, I attempt to dispel the myth that the scratch standard was changed during the 1960's and show that scratch number cannot be related to scratch width. Finally, I describe a preliminary aging experiment that suggests that the scratch standards have not aged with time and are, in fact, extremely stable.

Paper Details

Date Published: 20 December 1989
PDF: 6 pages
Proc. SPIE 1164, Surface Characterization and Testing II, (20 December 1989);
Show Author Affiliations
Matt Young, National Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 1164:
Surface Characterization and Testing II
John E. Greivenkamp; Matthew Young, Editor(s)

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