Ultrasound single-element non-contacting inspection system

Details Ultrasound single-element non-contacting inspection system Ultrasound single-element non-contacting inspection system

2007-08-28

2007-08-28

Lee, Hwa (Andrew) (Department: 2886)

Optics: measuring and testing

By light interference

For dimensional measurement

C073S655000

Reexamination Certificate

active

10852782

ABSTRACT:
A laser ultrasonic inspection apparatus and method which enables remote sensing of thickness, hardness, temperature and/or internal defect detection is disclosed. A laser generator impinges a workpiece with light for generating a thermo-elastic acoustic reaction in a workpiece. A probe laser impinges the workpiece with an annularly-shaped probe light for interaction with the acoustic signal in the workpiece resulting in a modulated return beam. A photodetector having a sensitive region for detecting an annularly-shaped fringe pattern generated by an interaction of a reference signal and with the modulated return beam at said sensitive region.

REFERENCES:
patent: 5585921 (1996-12-01), Pepper et al.
patent: 5684592 (1997-11-01), Mitchell et al.
patent: 5909279 (1999-06-01), Pepper et al.
patent: 6008887 (1999-12-01), Klein et al.
patent: 6057927 (2000-05-01), Lévesque et al.
patent: 6075603 (2000-06-01), O'Meara et al.
patent: 6087652 (2000-07-01), O'Meara et al.
patent: 6115127 (2000-09-01), Brodeur et al.
patent: 6285514 (2001-09-01), O'Meara et al.
patent: 6342721 (2002-01-01), Nolte et al.
Fisher, D.J., et al., “Design and Manufacture of a Gradient-Index Axicon,”Applied Optics, vol. 39, No. 16, pp. 2687-2694 (Jun. 1, 2000).
Murray, T.W., et al., “Adaptive Optical Array Receivers for Detection of Surface Acoustic Waves,”Applied Optics, vol. 39, No. 19, pp. 3276-3284 (Jul. 1, 2000).
Scruby, C.B., et al., “Long-Path-Difference Interferometry,”Laser Ultrasonics, Techniques and Applications, Section 3.10, pp. 123-127 (1990).
Scruby, C.B., et al., “Applications Using Laser Generation of Ultrasound,”Laser Ultrasonics, Techniques and Applications, Section 6, pp. 325-351 (1990).

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