Optics: measuring and testing – By shade or color – With sequential comparison of sample and standard
Patent
1981-01-29
1984-10-02
Evans, F. L.
Optics: measuring and testing
By shade or color
With sequential comparison of sample and standard
356425, G01J 350
Patent
active
044744706
ABSTRACT:
The invention relates to an arrangement for color detection when evaluating printed materials, maps or the like in that a color pattern under investigation is arranged substantially in the plane of a reference color pattern and both being cyclicly detected by an opto-electronic detection unit. The detector, itself consists of only one opto-electronic transducer comprising a plurality of detecting faces which receive the color informations from an illumination source reflected at both color patterns. The opto-electronic transducer is followed by an evaluation electronic means which compares the reference color pattern and the investigated color pattern and associates the respective patterns.
REFERENCES:
patent: 3756725 (1973-09-01), Manring
patent: 3890048 (1975-06-01), Abbondio et al.
patent: 3995958 (1976-12-01), Pfahl et al.
patent: 4003660 (1977-01-01), Christie, Jr. et al.
Brandt Udo
Deter Christhard
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