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Proceedings Paper

Tunable Scratch Standards
Author(s): Matt Young; Eric G. Johnson; Richard Goldgraben
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Paper Abstract

The scratch standard. (MIL-0-13830A) is a cosmetic standard. that is effected by a visual comparison with a set of submasters that is in turn evaluated by comparison with a set of master standards. Both manufacture and certification of the submasters are somewhat unre-liable. In this paper, we show that the submasters can be classified. according to the relative power scattered at a relatively small angle. We have designed etched gratings with Which. to replace the submasters; these gratings have the appearance of scratches but diffract a broad peak between, 5 and 10 degrees off the axis of the incident beam. We have classified some prototypes both by comparison with the master standards and by a photo-electric measurement; agreement between. the two methods is good. We suggest that such gratings be used as the submasters and possibly that they be classified by a photoelectric rather than visual measurement.

Paper Details

Date Published: 3 September 1985
PDF: 8 pages
Proc. SPIE 0525, Measurement and Effects of Surface Defects & Quality of Polish, (3 September 1985); doi: 10.1117/12.946347
Show Author Affiliations
Matt Young, National Bureau of Standards (United States)
Eric G. Johnson, National Bureau of Standards (United States)
Richard Goldgraben, Decilog, Inc. (United States)


Published in SPIE Proceedings Vol. 0525:
Measurement and Effects of Surface Defects & Quality of Polish
Lionel R. Baker; Harold E. Bennett, Editor(s)

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