Apparatus and method for the optical examination of value documents
First Claim
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1. An apparatus for optical analysis of at least one value document in a recording area of the apparatus, comprising:
- an illumination device arranged to illuminate a value document in at least a part of the recording area and comprising at least four surface emitting laser diodes,a control device adapted to drive the laser diodes, anda detection device arranged to record optical radiation from at least a part of the recording area,wherein the laser diodes are configured in a chip,wherein said surface emitting laser diodes comprise at least two groups of surface emitting laser diodes, each group having at least two surface emitting laser diodes,wherein the laser diodes of one group are drivable independently of those of the other group, andwherein the control device is configured to drive one group of laser diodes separately from the drive of the other group or groups of laser diodes.
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Abstract
An apparatus for optical analysis of at least one value document (12) in a recording area (38) of the apparatus has an illumination device (36) for illuminating the value document (12) in the recording area (38) and possessing at least one surface emitting laser diode (50), a control device (42) for driving the laser diode (50), and a detection device (40) for recording optical radiation from the recording area (38).
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Citations
28 Claims
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1. An apparatus for optical analysis of at least one value document in a recording area of the apparatus, comprising:
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an illumination device arranged to illuminate a value document in at least a part of the recording area and comprising at least four surface emitting laser diodes, a control device adapted to drive the laser diodes, and a detection device arranged to record optical radiation from at least a part of the recording area, wherein the laser diodes are configured in a chip, wherein said surface emitting laser diodes comprise at least two groups of surface emitting laser diodes, each group having at least two surface emitting laser diodes, wherein the laser diodes of one group are drivable independently of those of the other group, and wherein the control device is configured to drive one group of laser diodes separately from the drive of the other group or groups of laser diodes. - View Dependent Claims (2, 3, 4, 8, 9, 10, 13, 14, 15, 16)
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5. An apparatus for optical analysis of at least one value document in a re-cording area of the apparatus, comprising:
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an illumination device arranged to illuminate a value document in at least a part of the recording area and comprising at least one surface emitting laser diode, a control device adapted to drive the at least one laser diode, and a detection device arranged to record optical radiation from at least a part of the recording area, wherein the illumination device is configured to illuminate a given area with an illumination pattern whose location-dependent intensity variation over the area illuminated by the at least one laser diode is smaller than 20% of the maximum intensity of the illumination pattern. - View Dependent Claims (6)
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7. An apparatus for optical analysis of at least one value document in a re-cording area of the apparatus, comprising:
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an illumination device arranged to illuminate a value document in at least a part of the recording area and comprising at least one surface emitting laser diode, a control device adapted to drive the at least one laser diode, and a detection device arranged to record optical radiation from at least a part of the recording area, wherein the at least one laser diode is disposed in the form of a matrix or on the points of a hexagonal point grid.
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11. An apparatus for optical analysis of at least one value document in a re-cording area of the apparatus, comprising:
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an illumination device arranged to illuminate a value document in at least a part of the recording area and comprising at least two surface emitting laser diodes, a control device adapted to drive the laser diodes, and a detection device arranged to record optical radiation from at least a part of the recording area, wherein the control device is configured to selectively drive only some of the laser diodes to emit optical radiation to produce a given illumination pattern, and to drive the laser diodes in such a way that a given illumination pattern is moved in a given direction at a given speed.
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12. An apparatus for optical analysis of at least one value document in a re-cording area of the apparatus, comprising
an illumination device arranged to illuminate a value document in at least a part of the recording area and comprising at least two surface emitting laser diodes, a control device adapted to drive the laser diode, and a detection device arranged to record optical radiation from at least a part of the recording area, wherein the control device is configured to selectively drive only some of the laser diodes to emit optical radiation to produce a given illumination pattern and the illumination device is configured to produce a rectangular illumination pattern.
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17. An apparatus for processing value documents having an analysis apparatus comprising an illumination device arranged to illuminate a value document in at least a part of the recording area and comprising at least one surface emitting laser diode,
a control device adapted to drive the at least one laser diode, and a detection device arranged to record optical radiation from at least a part of the recording area, wherein the at least one laser diode is configured in a chip, and a transport device arranged to move a value document through the recording area at a given speed, and wherein the control device is configured to drive the at least one laser diode in such a way that the illumination pattern is moved in the transport direction at the transport speed.
- 18. A method for optical analysis of a value document, comprising illuminating the value document in a recording area with at least four surface emitting laser diodes, the at least four laser diodes configured in a chip, wherein the illumination is carried out using a plurality of surface emitting laser emitting diodes, said plurality of diodes comprising at least two groups of surface emitting laser diodes with the laser diodes of one group being driven separately from those of the other group, wherein each group having at least two surface emitting laser diodes.
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20. A method for optical analysis of a value document, comprising
illuminating the value document in a recording area with a plurality of surface emitting laser diodes, the laser diodes being configured in a chip, said plurality of diodes comprising at least two groups of surface emitting laser diodes with the laser diodes of one group being driven separately from those of the other group, wherein the laser diodes are driven in such a way that the laser diodes illuminate a given area of the value document with an illumination pattern whose location-dependent intensity variation over the area is smaller than 20% of the maximum intensity of the illumination pattern.
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24. A method for optical analysis of a value document, comprising
illuminating the value document in a recording area with a plurality of surface emitting laser diodes, the laser diodes being configured in a chip, said plurality of diodes comprising at least two groups of surface emitting laser diodes with the laser diodes of one group being driven separately from those of the other group, wherein the laser diodes are driven in such a way that a given illumination pattern is moved in a given direction at a given speed.
Specification