Hybrid holographic non-destructive test system

Details Hybrid holographic non-destructive test system Hybrid holographic non-destructive test system

1976-05-14

1978-06-06

Corbin, John K.

Optics: measuring and testing

With plural diverse test or art

73603, 350 35, 356 73, G01N 2100, G02B 2700, G01N 300

Patent

active

040933822

ABSTRACT:
An automatic hybrid holograhic non-destructive testing (HNDT) method and system capable of detecting flaws or debonds contained within certain materials. This system incorporates the techniques of optical holography, acoustical/optical holography and holographic correlation in determining the structural integrity of a test object. An automatic processing system including a detector and automatic data processor is used in conjunction with the three holographic techniques for correlating and interpreting the information supplied by the non-destructive systems. The automatic system also includes a sensor which directly translates an optical data format produced by the holographic techniques into electrical signals and then transmits this information to a digital computer for indicating the structural properties of the test object. The computer interprets the data gathered and determining whether further testing is necessary, as well as the format of this new testing procedure.

REFERENCES:
patent: 3626753 (1971-12-01), Aprahamian et al.
patent: 3883215 (1975-05-01), Kurtz
Hinsley, J. E. "Non-Destructive Testing," MacDonald & Evans Ltd., 1959, pp. 44-49.
Waters, J. P., "Holography," Chapt. 2 of Holographic Non-Destructive Testing, edited by R. K. Erf, Academic Press, 1974, pp. 34-39.
Marrone et al., "Dual Index Holographic Contour Mapping Over a Large Range of Contour Spacings," Applied Optics, 1-1975, pp. 23-24.
Kurtz et al., "Hybrid Design Provides HNDT with Automatic Data Processing," Holosphere, 4-1976, pp. 1-5.
Pernick, B. J., "Limits to The Detection of Small Internal Voids in Solids With Holographic Techniques," Applied Optics, 7-1974, pp. 1711-1722.
Pryor, T. R., "Diffractographic Applications to Non-Destructive Testing," Materials Evaluation, 7-1974, pp. 142-152.

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