Objective Standards For Surface Flaws

Lionel R. Baker

doi:10.1117/12.949468

11 April 1989 Objective Standards For Surface Flaws

Lionel R. Baker

Proceedings Volume 1015, Micromachining Optical Components and Precision Engineering; (1989) https://doi.org/10.1117/12.949468
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany

Abstract

The variable results of a recent independent assessment of the relative performance of existing national standards relating to surface flaws such as digs and scratches, together with the greater use of laser optics, has led to renewed interest in objective methods for quantifying surface flaws. A code of practice for the measurement of flaws, with traceability to national standards, based on the use of a microscope image comparator, is described. The severity of a flaw is defined here as being proportional to the amount of light it removes from a beam. This code is suggested as a means for resolving disputes when a particular flaw, identified by any convenient method of observation, is found to be near a threshold of acceptance.

Citation Download Citation

Lionel R. Baker "Objective Standards For Surface Flaws", Proc. SPIE 1015, Micromachining Optical Components and Precision Engineering, (11 April 1989); https://doi.org/10.1117/12.949468

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