Laser-ultrasound spectroscopy apparatus and method with detectio

Details Laser-ultrasound spectroscopy apparatus and method with detectio Laser-ultrasound spectroscopy apparatus and method with detectio

1998-02-25

2000-05-02

Kim, Robert H.

Optics: measuring and testing

For light transmission or absorption

356349, 356357, G01B 902

Patent

active

060579277

ABSTRACT:
Apparatus and method for detecting shear resonances includes structure and steps for applying a radiation pulse from a pulsed source of radiation to an object to generate elastic waves therein, optically detecting the elastic waves generated in the object, and analyzing the elastic waves optically detected in the object. These shear resonances, alone or in combination with other information, may be used in the present invention to improve thickness measurement accuracy and to determine geometrical, microstructural, and physical properties of the object. At least one shear resonance in the object is detected with the elastic waves optically detected in the object. Preferably, laser-ultrasound spectroscopy is utilized to detect the shear resonances.

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