Inspection device

Optics: measuring and testing – By inspection with agitation or rotation – Of container contents

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Details

358106, G01N 2190, H04N 718

Patent

active

046766502

ABSTRACT:
A method and apparatus for lighting a container which is to be inspected for particulate contamination comprising a first lighting means consisting of two angularly displaced light beams which create an angular shadow zone, a second lighting means of significantly lower intensity than said first lighting means and positioned intermediate the two light beams and a viewing means positioned in the shadow zone.

REFERENCES:
patent: 3966332 (1976-06-01), Knapp et al.
patent: 4087184 (1978-05-01), Knapp et al.
patent: 4402612 (1983-09-01), Alexander et al.

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