Scratch and Dig Proposal Would Enhance Standardization
Here's news for all who thought they'd never see a change in the U.S. MIL-O-13830A Scratch and Dig standard: The Army is recommending a change in drawing number 7641866 that defines the standard scratch artifact. The change will lead to an objective measure of scratch visibility rather than the subjective one used by trained inspectors for the past 40 years. It will also bring the principle of the U.S. scratch test more in line with recent international thinking about optical surface inspection methods.
Become a member of OSA or log in to view the full text of this article.
OSA Members get the full text of Optics & Photonics News, plus a variety of other member benefits.