OPTICAL DETERMINATION OF DEPTH OF DEFECTS BY REPLICATION TECHNIQUES
D.V. Miley, V. K. Grotzky · 1966
Replication of defects was accomplished by a variety of techniques and: produced accurate depth determinations.Of the replicating materials tested, General Electric RTV20 was most suitable for this application.A microscope is required for depth determinations on replicated surface defects.•Basically, this should be a binocular unit employing vertical illumination, with a fine focus mechanism graduated in microns.Examination is best accomplished at .magnifications• of 150-200X.,.