Application of Nondestructive Testing Techniques to Materials Testing.
Abstract
A range of fundamentally new optical nondestructive techniques has been demonstrated for measurements of surface defects, range, surface profiles and acoustic and thermal displacements of a surface. A wide aperture acoustic beam has been demonstrated to measure range to a far greater accuracy than with conventional NDT systems using short pulses. The range resolution of such a lens is comparable to a wavelength while that for a short pulse system is, at best, two or three wavelengths. Optical methods, developed during the program, have been successful in measuring film thicknesses to an accuracy of an order if 200A.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1986
- Accession Number
- ADA172005
Entities
People
- Gordon S. Kino
Organizations
- Stanford University