Method and apparatus for inspecting transparent objects

Details Method and apparatus for inspecting transparent objects Method and apparatus for inspecting transparent objects

1978-08-18

1981-10-06

Corbin, John K.

Optics: measuring and testing

Inspection of flaws or impurities

Containers or enclosures

250223B, 250224, G01N 2190

Patent

active

042932190

ABSTRACT:
Transparent objects having at least a localized region with symmetry of revolution are optically inspected by moving them to an examining station, locally illuminating each of them at the examining station with a plurality of circularly scanned fixed light beams, and detecting light from each by a plurality of successively interrogated fixed detection areas. In a preferred embodiment, the illumination is carried out by circular scanning in successive steps about the object with a plurality of differently-oriented, fixed light beams. At least one detection area is interrogated for each illumination step.

REFERENCES:
patent: 3226569 (1965-12-01), James
patent: 3349906 (1967-10-01), Calhoun et al.
patent: 3386579 (1968-06-01), Schulze et al.
patent: 3439178 (1969-04-01), Rottmann
patent: 3631255 (1971-12-01), Gender et al.
patent: 3848742 (1974-11-01), Krenmayr
patent: 3980890 (1976-09-01), Heckrodt et al.
patent: 4026414 (1977-05-01), Ellinger

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