Inspection of cylindrical objects

Details Inspection of cylindrical objects Inspection of cylindrical objects

1993-09-15

1996-07-30

Sikes, William L.

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

356237, G01N 2188, G01N 2100

Patent

active

055414184

ABSTRACT:
Apparatus for the inspection of the end surface of a cylindrical object including means for irradiating the end surface of the object, detector means for detecting radiation reflected by the end surface substantially parallel to the axis of the object and calculator means for calculating the proportion of the end surface which has reflected radiation directly to the detector means, wherein the means for irradiating comprises a ring source the center of the ring being substantially co-incident with the axis of the object and being substantially transparent to reflected radiation so that light reflected to the detector means passes unhindered through the ring, the ring source having associated therewith means permitting substantially uniform irradiation across the said end surface.

REFERENCES:
patent: 3707631 (1972-12-01), Untermyer
patent: 4026414 (1977-05-01), Ellinger
patent: 4606635 (1986-08-01), Miyazawa
patent: 4914289 (1990-04-01), Nguyen
patent: 4930872 (1990-06-01), Convery

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