Device for inspecting the inner wall of a body

Details Device for inspecting the inner wall of a body Device for inspecting the inner wall of a body

1989-11-20

1991-07-09

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356237, G01N 904

Patent

active

050308238

ABSTRACT:
A device is provided for inspecting the inner surface of a hollow body, such as a metal container with a cylindrical standing wall and a bottom. Initially, the hollow body and a light source are placed at chosen positions relative to each other, such that the light source can light the inner surface approximately uniformly. A video camera for inspecting the inner surface is positioned such that the direction of lighting and the direction of inspection of each portion of the inner surface approximately coincide.

REFERENCES:
patent: 3150266 (1964-09-01), Mathias
patent: 3761186 (1973-09-01), Wason
patent: 4283145 (1981-08-01), Miyazawa
patent: 4284353 (1981-08-01), Yoshida et al.
patent: 4500203 (1985-02-01), Bieringer
patent: 4758084 (1988-07-01), Tokumi et al.

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