Inspection lighting system
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United States of America Patent
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Nov 20, 1990
Issued Date -
N/A
app pub date -
Nov 20, 1989
filing date -
Oct 9, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An engineered lighting system for use in an inspection system is comprised of an array of light emitting diodes. A specimen is brought into the viewing area, and a current pulse is provided to the diodes of the array to selectively flash all or a portion of the diodes of the array. Reflected light from the specimen is sensed and a digitized image is generated therefrom. An illumination level of the digitized image is adjustable, in whole or in part, by varying the effective lighting intensity of one or more of the diodes of the array during a flash period. The digitized image of the specimen is compared to data indicative of acceptability of the specimen, and acceptance or rejection of the specimen is decided on a basis of a comparison therebetween.
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Cited Art Landscape
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