Optical nondestructive testing method of composite materials

Details Optical nondestructive testing method of composite materials Optical nondestructive testing method of composite materials

1988-03-28

1989-10-03

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356360, 73656, G01B 902

Patent

active

048712558

ABSTRACT:
An optical nondestructive testing method of composite materials utilizes optical interferometry to find the resonant vibration from at least one surface of the target part of an object being inspected, and also determines the resonant frequency at that time. Another resonant frequency exhibiting the same resonant vibration is then obtained from the rear surface of the part of the object being inspected and the two resonant frequencies are used to derive the depth of defects in the object.

REFERENCES:
patent: 3899921 (1975-08-01), Hockley

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