Modern methods of surface examination show that even high-quality surfaces, fit for their intended purpose, are subject to surface imperfections. Thus it is necessary to agree on imperfection thresholds acceptable for particular applications. After a brief description of four national standards, a table of imperfection threshold values is presented as a quality guideline for different applications. This is based on mean values obtained from an international survey conducted by the author under the auspices of the International Commission for Optics.

Date Published: 1 August 1994
PDF: 3 pages
Opt. Eng. 33(8) doi: 10.1117/12.176518
Published in: Optical Engineering Volume 33, Issue 8