Optics: measuring and testing – Document pattern analysis or verification
Patent
1997-04-14
1999-04-20
Font, Frank G.
Optics: measuring and testing
Document pattern analysis or verification
356 73, 356326, 356416, 2505594, 25055944, 283 85, 283 91, G06K 974, B42D 1500, G01N 2100
Patent
active
058961925
ABSTRACT:
Apparatus for discriminating bills includes a sensitive color plate provided on one side of a bill transport passage for transporting bills therethrough, and a light source for emitting light toward the sensitive color plate. A reflecting plate is provided parallel to the sensitive color plate on the other side of the bill transport passage for reflecting light from the light source transmitted through the sensitive color plate back toward the sensitive color plate. A band-pass filter passes light having a prescribed wavelength range and cuts light having other wavelengths. A photosensor detects the light reflected by the reflecting plate and transmitted through the sensitive color plate and the band-pass filter. With this arrangement, it is possible to discriminate bills having a transparent portion with high accuracy.
REFERENCES:
patent: 3858977 (1975-01-01), Baird et al.
patent: 4526466 (1985-07-01), Sandercock
patent: 4832445 (1989-05-01), Haines et al.
patent: 5248544 (1993-09-01), Kaule
patent: 5304813 (1994-04-01), De Man
Font Frank G.
Laurel Bank Machines Co. Ltd.
Vierra-Eisenberg Jason D.
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