Method and apparatus for optical inspection

Details Method and apparatus for optical inspection Method and apparatus for optical inspection

1995-10-31

1997-12-16

Evans, F. L.

Optics: measuring and testing

Inspection of flaws or impurities

Having predetermined light transmission regions

G01N 2188

Patent

active

056991533

ABSTRACT:
The present invention provides an inspecting method and an apparatus therefor. A light illuminates an object to be inspected having optical diffusive characteristics such as a ceramics plate. A part of the light diffuses in the object from an illumination area is reflected at or passes through a defect such as a crack and reaches an imaging area. An image sensor detects the image of the imaging area. A signal showing a larger change is processed thereby to inspect the defect. The object is displaced stepwise relative to the light source and the image sensor. Thus, a crack or the like in an object can be inspected with high accuracy and at a high speed.

REFERENCES:
patent: 3574470 (1971-04-01), Paine et al.
patent: 3976384 (1976-08-01), Matthews et al.
patent: 4538909 (1985-09-01), Bible et al.
patent: 4555179 (1985-11-01), Langerholc et al.
patent: 5137355 (1992-08-01), Barbour et al.
patent: 5355213 (1994-10-01), Dotan
patent: 5517301 (1996-05-01), Dave356239

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