Optical sensing device for detecting optical features of valuable papers
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Abstract
An optical sensing device for detecting plural optical features of valuable papers is provided that comprises first and second photocoupers 5 and 6 or 9 and 10 positioned in the vicinity of and on the opposite sides of a passageway 13 for guiding the valuable paper 64. Each of first and second photocouplers 5 and 6 or 9 and 10 has a light emitting element 20, 22, 30, 32 for emitting a light, and a light receiving element 21, 23, 31, 33 for selectively receiving the light from the light emitting element 20 so that each light receiving element 21, 23, 31, 33 can receive lights reflected on and penetrating the valuable paper 64 for detection of multiple optical features from the valuable paper 64. Thus, the optical sensing device can derive plural optical scanning patterns by means of less number of light emitting and receiving elements to improve accuracy in valuable paper validation; can pick out optical patterns for different colors printed on valuable paper by means of plural lights of different wavelength irradiated on a same scan line or area on valuable paper; and can utilize inexpensive light emitting and receiving elements to reduce cost for manufacture.
68 Citations
32 Claims
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1-19. -19. (canceled)
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20. An optical sensing device for detecting optical features of valuable papers, comprising a triplex assembly positioned in the vicinity of a passageway for guiding the transported valuable paper,
the triplex assembly comprising two light emitting elements for emitting first and second lights of the different wavelength from each other, and a light receiving element for receiving the first and second lights reflected on the valuable paper at the different points in time, and a case for accommodating the light emitting elements and light receiving element in the fixed positions.
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23. An optical sensing device for detecting optical features of valuable papers, comprising first and second triplex assemblies positioned on the opposite sides of a passageway for guiding the transported valuable paper,
each of the first and second triplex assemblies including at least a light emitting element for emitting a light and at least a light receiving element for receiving the light that is emitted from the light emitting element and reflected on or penetrating the valuable paper.
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29. An optical sensing device for detecting optical features of valuable papers, comprising first and second triplex assemblies positioned in the vicinity of and on the opposite sides of a passageway for guiding the transported valuable paper;
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one of the first and second triplex assemblies has first and second light emitting elements for emitting first and second lights, and a first light receiving element adjacent to the first and second light emitting elements;
the other of the first and second triplex assemblies has a third light emitting element for emitting a third light, and second and third light receiving elements adjacent to the third light emitting element;
the first light receiving element receives the first and second lights reflected on the valuable paper from the first and second light emitting element and the third light that penetrates the valuable paper from the third light emitting element;
the second light receiving element receives the third light reflected on the valuable paper from the third light emitting element and the first light that penetrates the valuable paper from the first light emitting element;
the third light receiving element receives the third light reflected on the valuable paper from the third light emitting element and the second light that penetrates the valuable paper from the second light emitting element;
at least one of the first, second and third light emitting elements produces infrared ray;
the first, second and third light emitting elements are turned on at the different points in time. - View Dependent Claims (30, 31, 32)
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Specification