Optics: measuring and testing – Inspection of flaws or impurities – Having predetermined light transmission regions
Patent
1996-09-13
1997-11-18
Font, Frank G.
Optics: measuring and testing
Inspection of flaws or impurities
Having predetermined light transmission regions
356369, 250225, 25055946, G01N 2100, G01J 400
Patent
active
056893329
ABSTRACT:
Apparatus for the automated real-time detection and classification of defects during the machining of ceramic components employs an elastic optical scattering technique using polarized laser light. A ceramic specimen is continuously moved while being machined. Polarized laser light is directed onto the ceramic specimen surface at a fixed position just aft of the machining tool for examination of the newly machined surface. Any foreign material near the location of the laser light on the ceramic specimen is cleared by an air blast. As the specimen is moved, its surface is continuously scanned by the polarized laser light beam to provide a two-dimensional image presented in real-time on a video display unit, with the motion of the ceramic specimen synchronized with the data acquisition speed. By storing known "feature masks" representing various surface and sub-surface defects and comparing measured defects with the stored feature masks, detected defects may be automatically characterized. Using multiple detectors, various types of defects may be detected and classified.
REFERENCES:
patent: 3993976 (1976-11-01), Ginsburg
patent: 4314017 (1982-02-01), Takahashi
patent: 4314763 (1982-02-01), Steignmeier
patent: 4352016 (1982-09-01), Duffy
patent: 4391524 (1983-07-01), Steigmeier
patent: 4933537 (1990-06-01), Silva
patent: 4978862 (1990-12-01), Silva
patent: 5032734 (1991-07-01), Orazio, Jr.
patent: 5070045 (1991-12-01), Comte
patent: 5196716 (1993-03-01), Moriya
patent: 5426506 (1995-06-01), Ellingson
"Analytical Calculations and Numerical Simulations of Box-Car Thermal Wave Imges of Planar Subsurface Scatterers," by D.J. Crowther et al., Wayne State University, Review of Progress in Quantitative Nondestructive Evaluation, vol. 11A, pp. 417-423, 1992.
Ellingson William A.
Sun Jiangang
Font Frank G.
Merlino Amanda
The University of Chicago
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