Adaptive lighting control apparatus for illuminating a variable-

Details Adaptive lighting control apparatus for illuminating a variable- Adaptive lighting control apparatus for illuminating a variable-

1996-03-15

1999-02-09

McGraw, Vincent P.

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

25055946, G01N 2189

Patent

active

058702032

ABSTRACT:
A lighting control apparatus for illuminating a moving variable-speed web for inspection with a camera is provided. The apparatus is comprised of a detecting device for detecting the positioning of the web; a lighting device, aligned with the camera, for emitting a light to illuminate the web; a calculating device for calculating the speed of the web; and a control device which controls the emission of light by the lighting device as a function of the speed of the web.

REFERENCES:
patent: 3761177 (1973-09-01), Corse
patent: 4377746 (1983-03-01), Kopineck et al.
patent: 4641256 (1987-02-01), Marchegiano
patent: 4930889 (1990-06-01), Van Donselaar et al.

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