Accession Number:

ADA172005

Title:

Application of Nondestructive Testing Techniques to Materials Testing.

Descriptive Note:

Annual rept. 1 Jan-31 Dec 85,

Corporate Author:

STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS

Personal Author(s):

• Kino,G. S.

Report Date:

1986-02-01

Pagination or Media Count:

78.0

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.

Descriptors:

• *NONDESTRUCTIVE TESTING
• *ACOUSTIC MICROSCOPES
• MIRRORS
• MANUFACTURING
• OPTICAL DETECTION
• DISPLACEMENT
• RESOLUTION
• THIN FILMS
• SURFACE ROUGHNESS
• ACCURACY
• DEFECTS(MATERIALS)
• DATA ACQUISITION
• ACOUSTOOPTICS
• PHOTOLITHOGRAPHY
• ACOUSTIC BEAMS

Subject Categories:

• Test Facilities, Equipment and Methods
• Acoustic Detection and Detectors
• Optical Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE