Optics: measuring and testing – Of light reflection
Patent
1983-03-18
1985-11-26
McGraw, Vincent P.
Optics: measuring and testing
Of light reflection
250559, G01N 2155
Patent
active
045551804
ABSTRACT:
An improved apparatus for measuring the printed area of a printing plate upon which a printing image is formed, of the type having a movable scanning head provided with longitudinally arranged light sources and plural photosensors arranged in parallel with the light sources. The improvement is composed of a proving sensor device separate from and movable independently of the scanning head which includes at least one light source and photosensor. The proving sensor device provides calibration data for correcting the measurements made by the scanning head. It does this by measuring the intensity of reflected light from a totally dark printing area and a non-printing area from anywhere on the printing plate, and a totally reflective surface and totally absorptive surface, which are preferably located apart from the printing plate. The improvement further includes control means for electronically processing the measurement data produced by both the scanning head and proving sensor device.
REFERENCES:
patent: 3829222 (1974-08-01), Aslund
patent: 3832070 (1974-08-01), Cox
patent: 3853409 (1974-10-01), Gaillochet
patent: 3958509 (1976-05-01), Murray et al.
patent: 4210818 (1980-07-01), Green et al.
patent: 4239393 (1980-12-01), Tobias
patent: 4441819 (1984-04-01), Takeuchi et al.
Hohki Tetsuo
Kurusu Yasuo
Masuda Tatsunosuke
Dainippon Screen Mfg. Co,. Ltd.
McGraw Vincent P.
Turner S. A.
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