Optical web monitoring device with row cameras with directed ill

Details Optical web monitoring device with row cameras with directed ill Optical web monitoring device with row cameras with directed ill

1988-03-18

1990-07-03

McGraw, Vincent P.

Optics: measuring and testing

By monitoring of webs or thread

250572, 356431, G01N 2186, G01N 2189

Patent

active

049386018

ABSTRACT:
An optical web monitoring device is described for which a directed illumination is realized by means of a mirror strip which fully illuminates the pupil of the camera objective of a diode row camera with the image of the illuminating pupil. All contrasting methods can thus be used also for the finding of surface faults in running webs. Several cameras or one camera with pupil division and two diode rows can be simultaneously illuminated using one illuminating device.

REFERENCES:
patent: 2548551 (1951-04-01), Morrison
patent: 4664520 (1987-05-01), Matsuo et al.
patent: 4775238 (1988-10-01), Weber

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