| 摘要 |
PROBLEM TO BE SOLVED: To provide an image detector for paper currency which enables cost reduction. SOLUTION: This image detector for a paper currency has a light emitting means 31 (31X), another light emitting means 27 (27X), an image detecting sensor 24 (24Y) provided opposite an image detecting sensor 24 (24X), and a third light emitting means 27 (27Y). The light emitting means 31 (31X) is arranged oppositely to the image detecting sensor 24 (24X), and emits a plurality of light beams different in wavelength bands toward a paper currency in a paper currency conveying passage 12 to detect transmission light of the light beams in the paper currency S by the image detecting sensor 24 (24X). The light emitting means 27 (27X) is arranged in the side same to the image detecting sensor 24 (24X), and emits a plurality of light beams different in wavelength bands toward the paper currency S to detect reflection light of the light beams from the paper currency S by the image detecting sensor 24 (24X). The third light emitting means 27 (27Y) is arranged in the side same to image detecting sensor 24 (24Y), and emits a plurality of light beams different in wavelength bands toward the paper currency S to detect reflection light of the light beams from the paper currency S by the image detecting sensor 24 (24Y). COPYRIGHT: (C)2005,JPO&NCIPI
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