Image reading device

Abstract

An image reading device includes: a conveying unit for conveying an irradiated member that has a hologram area in a conveying direction; a first light source for applying light to an irradiated part in the hologram area; and a second light source separated from the first light source along the conveying direction and applying light to an irradiated part in the hologram area when the hologram area is conveyed by a prescribed distance. An irradiation angle at which the irradiated part is irradiated with the light of the first light source is made to be different from an irradiation angle at which the irradiated part is irradiated with the light of the second light source when the hologram part is conveyed by the prescribed distance. Lights reflected by the hologram area are respectively received to detect an electric signal of the hologram area of the irradiated member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional structural view of an image reading device according to a first embodiment of the present invention.

FIG. 2 is an entire sectional structural view of the image reading device according to the first embodiment of the present invention.

FIG. 3 is a plan view of a transmitting member of the image reading device according to the first embodiment of the present invention.

FIG. 4 is a side view of the image reading device according to the first embodiment of the present invention.

FIG. 5 is a plan view of the image reading device according to the first embodiment of the present invention.

FIG. 6 is a circuit diagram of the image reading device according to the first embodiment of the present invention.

FIG. 7 is a flowchart of the image reading device according to the first embodiment of the present invention.

FIG. 8 is a light source control timing chart of the image reading device according to the first embodiment of the present invention.

FIG. 9 is a light source control timing chart of the image reading device according to the first embodiment of the present invention.

FIG. 10 is an image outputting timing chart of the image reading device according to the first embodiment of the present invention.

FIG. 11 is a diagram for explaining an angle of irradiation of a light source of the image reading device according to the first embodiment of the present invention.

FIG. 12 is a diagram for explaining a kind of a light source and a spectral sensitivity of a sensor of the image reading device according to the first embodiment of the present invention.

FIGS. 13A and 13B are plan views of the sensor of the image reading device according to the first embodiment of the present invention. FIG. 13A shows a monochromatic reading sensor and FIG. 13B shows a color reading sensor.

FIGS. 14A and 14B are diagrams for explaining a relation between the inserting direction of a note and a hologram of the image reading device according to the first embodiment of the present invention.

FIG. 15 is a signal processing circuit diagram of outputs of a photo-sensor of the image reading device according to the first embodiment of the present invention.

FIG. 16 is a logic diagram of the outputs of the photo-sensor of the image reading device according to the first embodiment of the present invention.

FIG. 17 is a flowchart of a series of operations of the image reading device according to the first embodiment of the present invention.

FIG. 18 is a hologram diagram of the image reading device according to the first embodiment of the present invention.

FIGS. 19A to 19C are floating island type hologram distribution diagram of the image reading device according to the first embodiment of the present invention. FIG. 19A shows entire data stored in a RAM, FIG. 19B shows reduced hologram data and FIG. 19C shows collating data.

FIG. 20 is a block diagram for explaining a collating method of the image reading device according to the first embodiment of the present invention.

FIG. 21 is a collating wave form diagram of the image reading device according to the first embodiment of the present invention.

FIG. 22 is a diagram for explaining outputs of the sensor divided respectively for spectrums in the image reading device according to the first embodiment of the present invention.

FIG. 23 is a sectional structural view of an image reading device according to a second embodiment of the present invention.

FIG. 24 is a sectional structural view of an image reading device according to a third embodiment of the present invention.

FIG. 25 is a plan view of a transmitting member of the image reading device according to the third embodiment of the present invention.

Claims

1. An image reading device comprising: a conveying unit for conveying an irradiated member that has a hologram area in a conveying direction;a first light source for applying light to an irradiated part in the hologram area; anda second light source separated from the first light source along the conveying direction and applying light to an irradiated part in the hologram area when the hologram area is conveyed by a prescribed distance,wherein an irradiation angle at which the irradiated part is irradiated with the light of the first light source is made to be different from an irradiation angle at which the irradiated part is irradiated with the light of the second light source when the hologram part is conveyed by the prescribed distance, andwherein lights reflected by the hologram area are respectively received to detect an electric signal of the hologram area of the irradiated member.

2. The image reading device according to claim 1, wherein the first light source has a light guide part for guiding the light to the irradiated part and is provided at a remoter position from the irradiated part than the second light source.

3. An image reading device comprising: one and the other light sources;a light guide part for guiding the light of the one light source to an irradiated part in a hologram area of an irradiated member;a lens array for converging the lights of the one and the other light sources reflected by the irradiated part of the hologram area; andfirst and second image sensors having sensors for receiving the lights converged by the lens array,wherein the first and second image sensors are separated from each other by a prescribed distance in a conveying direction, andwherein when the reading of the light by the one light source is carried out in the first image sensor, the reading of the light by the other light source is carried out in the second image sensor to detect an electric signal of the hologram area of the irradiated member.

4. The image reading device according to claim 3, wherein the first and second image sensors are formed integrally.

5. An image reading device comprising: a conveying unit for conveying an irradiated member that has a hologram area in a conveying direction;a first light source provided on a first substrate;a light guide part for guiding light so as to irradiate the hologram area of the irradiated member with the light of the first light source;a first lens array for converging the lights reflected by the hologram area;a first sensor provided on a second substrate to receive the lights converged by the first lens array;a second lens array opposed to the first lens array;a first light shield member provided between the first lens array and the second lens array and disposed on the second substrate;a second light source provided on the first light shield member to apply light to the irradiated part of the hologram area conveyed by the conveying unit at an irradiation angle different from an irradiation angle at which the hologram area is irradiated with the light of the first light source;a second sensor provided on the second substrate for receiving the lights of the second light source reflected by the hologram area and converged by the second lens array; anda checking unit for checking whether a hologram in the hologram area is true or false in accordance with output signals of the first and second sensors.

6. The image reading device according to claim 5, wherein the first light source is a plasma light source and the second light source is an LED light source.

7. The image reading device according to claim 5, wherein light applying directions to the hologram area by the first and second light sources are respectively considered to be components of the conveying direction of the irradiated member.

8. The image reading device according to claim 6, wherein in the second light source, one angular part of a prism shaped reflecting member is cut out to form an output part of light.

9. The image reading device according to claim 7, wherein a second light shield member is provided at a part opposite to the output part of the light of the second light source.

10. The image reading device according to claim 5, wherein the second light source is supplied electric power from the second substrate through the first light shield member.

11. The image reading device according to claim 1, wherein the first light source is a white light source and the second light source is a quasi-white light source for emitting lights of a plurality of wavelengths.

12. The image reading device according to claim 3, wherein the first and second image sensors are arranged both in the front side and the back side of the irradiated member and the relative positions thereof are shifted in the conveying direction of the irradiated member.

13. An image reading device comprising: a conveying unit for conveying an irradiated member that has a hologram area in a conveying direction;a first light source for applying light to an irradiated part in the hologram area;a second light source separated from the first light source along the conveying direction, applying light to an irradiated part in the hologram area when the hologram area is conveyed by a prescribed distance, and provided so as to apply light to the irradiated part when the hologram area is conveyed by the prescribed distance at an irradiation angle different from an irradiation angle at which the irradiated part is irradiated with the light of the first light source;first and second lens arrays for respectively converging the lights of the first and second light sources reflected by the irradiated part in the hologram area;first and second sensors for receiving the lights respectively converged by the first and second lens arrays to photoelectrically convert the lights; anda checking unit for comparing output signals of the first and second sensors with each other to check whether a hologram in the hologram area of the irradiated member is true or false.

14. An image reading device comprising: a conveying unit for conveying an irradiated member that has a hologram area in a conveying direction;a first light source for applying light to an irradiated part in the hologram area;a second light source separated from the first light source along the conveying direction, applying light to an irradiated part in the hologram area when the hologram area is conveyed by a prescribed distance, and provided so as to apply light to the irradiated part when the hologram area is conveyed by the prescribed distance at an irradiation angle different from an irradiation angle at which the irradiated part is irradiated with the light of the first light source;first and second lens arrays for respectively converging the lights of the first and second light sources reflected by the irradiated part in the hologram area;first and second sensors for receiving the lights respectively converged by the first and second lens arrays to photoelectrically convert the lights;a difference detecting unit for detecting a difference value of output signals of the first and second sensors;a storing unit for storing a true hologram distribution map in the hologram area of the irradiated member; anda checking unit for comparing the detecting signal of the difference detecting unit with true hologram distribution map data taken from the storing unit to check whether the hologram in the hologram area of the irradiated member is true or false.

15. The image reading device according to claim 14, wherein the checking unit temporarily stores a difference value of the output signals of the first and second sensors in a RAM.

16. An image reading device comprising: a conveying unit for conveying an irradiated member that has a hologram area in a conveying direction;a hologram detecting unit for detecting the passage of the hologram area of the irradiated member to output a detecting signal;a first light source for applying light to an irradiated part in the hologram area of the irradiated member;a second light source separated from the first light source along the conveying direction of the irradiated member and applying light to an irradiated part in the hologram area when the irradiated member is conveyed by a prescribed distance at an irradiation angle different from a prescribed irradiation angle in the first light source;a lighting control unit for respectively controlling the first and second light sources to be turned on when the detecting signal of the hologram detecting unit is received; anda sensor IC for respectively receiving the lights by the first and second light sources reflected from the hologram area to detect an electric signal of a hologram in the hologram area of the irradiated member.

17. The image reading device according to claim 16, wherein the lighting control unit controls the first light source in a pre-stage in the conveying direction of the irradiated member to be turned on, and controls the second light source in a post-stage to be turned on after a prescribed time elapses.

18. The image reading device according to claim 16, wherein the lighting control unit controls the first or the second light source to be turned on only for a time of the passage of the hologram area of the irradiated member in the conveying direction.

19. The image reading device according to claim 16, wherein the lighting control unit detects that the hologram area of the irradiated member passes the hologram detecting unit in a time period where the level of the detecting signal from the hologram detecting unit is not higher than a prescribed level.

20. A note reading method comprising: applying light to the hologram area of a note at a prescribed irradiation angle;receiving a reflected light from the hologram area and converting the light to an electric signal;applying light to the hologram area at an irradiation angle different from the prescribed irradiation angle when the note is conveyed by a prescribed distance to receive the reflected light and convert the light to an electric signal; andchecking whether a hologram in the hologram area of the note is true or false on the basis of these electric signals.

21. A note reading method comprising: applying light to a note having a hologram area at a prescribed irradiation angle;receiving a reflected light to convert the light to an electric signal;applying light to the note conveyed by a prescribed distance at an irradiation angle different from the prescribed irradiation angle to receive the reflected light and convert the light to an electric signal; anddetecting the hologram area of the note to check its truth or falseness on the basis of these electric signals.