Method and apparatus for optically detecting defects in a transp

Details Method and apparatus for optically detecting defects in a transp Method and apparatus for optically detecting defects in a transp

1978-01-20

1980-06-17

Corbin, John K.

Optics: measuring and testing

By inspection with agitation or rotation

Of containers

209526, 356240, G01N 2102

Patent

active

042081300

ABSTRACT:
An optical control unit comprises a base and at least one optical assembly having optical emitting means and conjugate optical receiving means with preset and fixed focal distances, the optical emitting means and conjugate optical receiving means being associated with the base so as to have fixed orientations with respect to the base and be capable of movement in directions parallel and transverse to the face of the base. The optical control unit is positioned with respect to the object to be inspected, and the optical emitting means and conjugate optical receiving means are sighted on a selected region of the wall of the object, the adjustment of sighting being accomplished through simple translations of the optical emitting means and receiving means while maintaining their orientations on the optical control unit unchanged. The selected region of the wall is scanned through a complete rotation of the object, the deviation in intensity of light collected in the course of this scanning being used to detect defects in the object.

REFERENCES:
patent: 2902151 (1959-09-01), Miles et al.
patent: 3171033 (1965-02-01), Mathias et al.
patent: 3249224 (1966-05-01), Uhlig
patent: 3848742 (1974-11-01), Krenmayr
patent: 3887285 (1975-06-01), Fry et al.

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