Abstract

Evaluation of the depth of subsurface damage (SSD) on ground glass surfaces can be performed using a taper polishing (1) or "dimpling" technique (2) to expose the glass below the surface to observation. However, accurate determination of the depth is dependent on the ability to microscopically detect cracks. An etchant is generally applied to the glass surface prior to dimpling to "open" cracks and improve their detection.

© 1994 Optical Society of America