JP2001319340A - Optical recording medium reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of an information reading error due to the inclination of a card 101 in a guiding groove in a card reader 100 for reading information by manually carrying the card 101 containing hologram pattern 106 having information recorded as a diffracted image along the guiding groove 102. SOLUTION: This device is provided with a guide roller 107 for pressing the card 101 to the traveling reference surface of the guiding groove 102.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording medium reader for reading information from an optical recording medium on which information is recorded as a hologram image, and more particularly to a recording medium such as a prepaid card, a credit card, a cash card, and a certification card. The present invention relates to an optimum configuration for an apparatus for manually transporting and reproducing recorded hologram information.

[0002]

2. Description of the Related Art In modern society, various cards are used for payment, identification, and the like. For prepaid cards, credit cards, certification cards, etc.
A magnetic recording medium is widely used as a means for recording information such as a D-number and a money amount. However, there is a risk that forgery or falsification of magnetic recording may be easily performed, and there is a problem that the reliability of the card is reduced.

As a means related to a conventional magnetic recording medium for solving the above-mentioned problems, the present applicant has previously assigned a plurality of hologram patterns to a CGH (Computer Gene).
An optical recording medium arranged on one substrate as a rated hologram (computer-generated hologram) has been developed and applied for a patent, which is disclosed in JP-A-10-143603.

In the above-mentioned optical recording medium, a plurality of hologram patterns are formed on the surface of the card in a plurality of rows in the X direction.
It is configured to be two-dimensionally arranged along a plurality of columns in the Y direction. In order to read recorded data from such an optical recording medium, the optical recording medium is transported in the Y direction, and a plurality of hologram patterns arranged in the X direction are irradiated with light beams, respectively, and projected by the transmitted diffraction light or the reflected diffraction light. This is for reading recorded data from a light beam pattern or a reproduced image to be projected.

The present applicant has already developed and applied for a patent as an optical recording medium recording / reproducing apparatus for recording and reproducing a plurality of hologram patterns on a substrate.
It is disclosed in Japanese Patent Application Publication No. 1-224727. The disclosed technique relates to a configuration of a recording / reproducing apparatus for an optical recording medium having an optical pickup means for inserting and conveying a card having a hologram image and irradiating a monochromatic light to read information from a diffraction image generated. is there.

The hologram used in the above-mentioned prior art is not a rainbow hologram which irradiates natural light to recognize information with the naked eye, but irradiates monochromatic light and projects its diffracted light on a screen or an image pickup device. Is used. C
The details of GH are described in detail in the above-mentioned material disclosed by the present applicant.

Based on the above circumstances, an optical recording medium reading apparatus according to the prior art will be described with reference to FIGS.

FIGS. 1 and 2 are a plan view (FIG. 1) and a side view (FIG. 2) of a configuration example of a conventional manual optical recording medium reader (200).

As shown in FIGS. 1 and 2, a card (201) on which holograms are arranged is manually conveyed from left to right (in the posture shown) along a guide (202), and
01) The recording data sequence (206) of the upper CGH is irradiated with laser light, and the diffracted light is received by the image sensor (205) and converted into an electric signal to read the recording data.

FIG. 3 is a perspective view for explaining reading of information. After a laser beam emitted from a laser light source (203) is reflected by a mirror (204), a CG on a card (201) is read.
The H data sequence (206) is irradiated, and a CGH diffraction image (a character pattern of “A” in the illustrated example) is formed on the image sensor (2).
05) shows a configuration reproduced on the imaging surface (207).

[0011]

As shown in FIG. 4, which is a sectional view of a conventional optical recording medium reader (200), a card (201) and a guide (2) for the reader are shown.
02), there is a gap having a size of “Wt”. Here, “W” is the gap dimension of the guide groove (202), and “t” is the thickness dimension of the card (201).

As shown in FIG. 5, which is another cross-sectional view, if the card (201) is inclined at an angle of θ inside the guide groove (202), the CGH (20) depends on the magnitude of θ.
6) The relationship between the incident angle (angle incident on the card) and the diffraction angle (angle at which the diffracted light is emitted from the card) of the laser light irradiated on the image is broken, and the position of the reproduced image on the imaging surface is shifted, and the reading is performed. Errors could occur.

In order to prevent the card (201) from tilting, the gap inside the guide groove (202) is reduced.
2) The card (20
1) may not pass through the guide (202).

Therefore, if the gap size of the guide groove (202) of the reading device (200) is kept large, the size of the imaging element surface must be large enough to absorb the variation in the position of the diffraction image. And guide groove (202)
In order to reduce the gap size, it is necessary to prepare parts having high dimensional accuracy and to assemble with high accuracy. In any case, the accuracy of the card (201) and the reader (200) is increased, and the cost is increased. There was a problem that it would be a factor to boost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and prevents a reading error of a hologram diffraction image due to an inclination of a card (201) in a guide groove (202) and achieves low-cost optical recording. In order to provide a medium reading device, "(Claim 1) conveys a card-shaped optical recording medium having a hologram pattern for generating a diffraction image in response to irradiation of monochromatic light arranged on the surface or inside thereof along a guide groove. An optical recording medium reading apparatus comprising: a guide unit; and an optical pickup unit configured to capture a diffraction image of the hologram pattern arranged on the optical recording medium inserted in the guide groove and read information, and The rotatable hologram pattern is brought into contact with one surface of the optical recording medium which is conveyed in a rotatable manner, and the other surface is brought into contact with the inner surface of the guide groove while sliding. The hologram, comprising at least four guide roller means for performing relative positioning of the optical pickup means and the monochromatic light emitted from the optical pickup means in a range surrounded by each of the guide roller means. An optical recording medium reading device, wherein the guide roller means is arranged so that a pattern is located. "Or" (Claim 2) the guide roller means reads all hologram patterns on the optical recording medium. 2. The optical recording medium reading apparatus according to claim 1, wherein the optical recording medium has at least four contact points with the optical recording medium at the position. 3. The recording medium according to claim 1, wherein the recording medium is pressed against the recording medium with a force of 0.5N or more and 1.5N or less. An object of the invention to provide a optical recording medium reader. ".

[0016]

In order to solve the above-mentioned problems, the present invention of claim 1 is directed to a card-shaped hologram pattern in which a hologram pattern for generating a diffraction image in response to irradiation of monochromatic light is arranged on the surface or inside. Light having guide means for conveying an optical recording medium along a guide groove, and optical pickup means for reading a diffraction image of the hologram pattern arranged on the optical recording medium inserted in the guide groove and reading information. In the recording medium reading device, the optical recording medium conveyed along the guide groove is rotatably abutted against one surface, and the other surface is abutted while sliding on the inner wall surface of the guide groove,
At least four guide roller units for performing relative positioning between the hologram pattern and the optical pickup unit are provided, and a monochromatic light emitted from the optical pickup unit is always irradiated within a range surrounded by each of the guide roller units. An optical recording medium reading device, wherein the guide roller means is arranged such that the hologram pattern is positioned. "I will provide a.

According to a second aspect of the present invention, there is provided an optical recording medium comprising: at least four guide rollers provided at a read position of all hologram patterns on the optical recording medium; 2. The optical recording medium reader according to claim 1, further comprising a contact.

In order to solve the above problem, the present invention according to claim 3 is characterized in that each of the guide roller means comes into contact with the optical recording medium and presses with a force of 0.5 N or more and 1.5 N or less. The optical recording medium reader according to claim 1 or 2. "

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An optical recording medium reading device according to an embodiment of the present invention will be described.

In the present embodiment, "(Claim 1) A guide for conveying a card-shaped optical recording medium having a hologram pattern for generating a diffraction image in response to irradiation of monochromatic light arranged on the surface or inside thereof along a guide groove. Means, and an optical recording medium reading device having an optical pickup means for taking a diffraction image of the hologram pattern arranged on the optical recording medium inserted in the guide groove and reading information, and One surface of the conveyed optical recording medium is rotatably pressed and pressed, and the other surface is brought into contact with the inner surface of the guide groove while sliding, thereby performing relative positioning between the hologram pattern and the optical pickup means. Monochromatic light having at least four guide roller means, and which is always emitted from the optical pickup means within a range surrounded by each of the guide roller means. Optical recording medium reader, wherein the hologram pattern to be irradiated is arranged the guide roller means so as to be positioned. "Alternatively,
"(Claim 2) The light according to claim 1, wherein the guide roller means has at least four contact points with the optical recording medium at the readout positions of all hologram patterns on the optical recording medium. (3) The guide roller means abuts on the optical recording medium and presses with a force of 0.5N or more and 1.5N or less. An optical recording medium reading device according to claim 2. "

FIGS. 6 and 7 are a plan view (FIG. 6) and a side view (FIG. 7) of the optical recording medium reading apparatus (100) of the present embodiment.
It is.

As is clear from the comparison of FIGS. 6 and 7 with FIGS. 1 and 2 of the conventional configuration described above, in the present embodiment, the card (101) is provided with the traveling reference surface in the guide groove (102). (See later) Guide roller mechanism (1)
07) is important.

The inner wall of the guide groove (102) on the side provided with the optical pickup means constituted by the laser light source (103), the mirror (104) and the image pickup device (105) in the apparatus is used as a reference for the travel of the card (101). The relative position between the hologram pattern (106) and the optical pickup means is determined by the contact of one surface of the card (101) with the traveling reference surface, so that a diffraction image is correctly formed on the imaging surface. And

A more detailed configuration of the guide roller mechanism (107) is such that a roller is rotatably disposed at one end of a swingable lever, and a tension spring is provided at the other end of the swing support point of the lever. The roller is urged in the direction of pressing the roller against the card (101). Further, the guide roller mechanisms (107) move independently and individually to apply the urging force to the card (1).
01).

The guide roller mechanism (107) is configured to satisfy the following conditions.

The first condition is that the hologram pattern (10
This relates to the relative positional relationship between the reading position 6) and the roller arrangement. As shown in FIG. 8, which is a layout diagram of the rollers, the number of rollers is required to be a minimum of four.
Even if the number is more than one, the effect does not change significantly. Also,
For the purpose of stably positioning the optical pickup means and the hologram pattern for reading information stably, the above reading position must always be located within the range surrounded by the arranged rollers. It is. With such a configuration, the reading position of the hologram pattern in the CGH card is always surrounded by the plurality of pressing members (rollers), and the contact pressing is stably maintained on the traveling reference surface in the guide groove.

On the other hand, in order to maximize the effect of the roller, as shown in FIG. 8, the optical pickup means is symmetrical in the left and right and up and down directions (according to the posture shown) with respect to the reading position (109) where information is read. What is necessary is just to arrange a roller.

Alternatively, if the rollers cannot be arranged at symmetric positions correctly for various reasons, the reading positions (1) in the long side direction and the short side direction inside the rectangle formed by the four rollers.
It is also possible to adopt a configuration in which the internal division ratio of the internal part 09) is arranged from 1: 1 to 1: 2. Incidentally, when the rollers can be arranged correctly and symmetrically, the internal division ratio is 1: 1.

The reason for setting the internal division ratio within 1: 2 is as follows. A roller (107) for pressing one surface of the card (101) presses the card (101) by the urging force of a spring (108), and the card (101) is inclined depending on a manual method of transporting the card (101). When the force is greater than the biasing force of the spring (108), the card (10
1) may depart from the running reference plane.

In this case, the other roller (not losing the manual force) still presses the card (101) to make contact with the running reference surface, and this contact point is used to adjust the inclination of the card (101). It becomes a fulcrum. Reading position (10
If the position 9) is located far away from the fulcrum, the hologram pattern will be far away from the normal position in accordance with the inclination, and there may be a problem in reading information.

Therefore, it is desirable that the reading position (109) is located at the midpoint of the two rollers, and that if the reading position (109) is located at least within 1: 2, a greater hand force is applied to the card (101). Even when the card (101) is tilted, the hologram pattern for reading information can be prevented from being largely deviated from a regular position, and an information reading error can be prevented.

The second condition relates to the roller arrangement condition with respect to the reading start position (106a) and the reading end position (106b) of the CGH data sequence (106) on the surface of the card (101).

As shown in FIG. 9, in the present embodiment, CGH
When the optical pickup means tries to read the information of the card (101) at all points including the reading start (106a) and the reading end position (106b) of the data string (106), all four rollers are turned on the card (101). 101) to apply a biasing force to the surface.

With the above arrangement, when reading information from the hologram pattern, the four rollers always press the card (101) to abut the running reference surface, so that the inclination of the card (101) is prevented. Is done. For example, if only two rollers on one side are pressing the card (101), the card (101) is easily inclined and separates from the hologram pattern.

The third condition is a guide roller mechanism (107).
Regarding the biasing force.

As shown in FIG. 10, according to the configuration of the manual reader (100) of the present embodiment, the card (10
The direction of the force applied to the card (101) from the human hand during the transfer of (1) and the guide roller mechanism (107) are controlled by the card (10).
The direction of the biasing force that causes 1) to abut on the traveling reference plane intersects the direction substantially perpendicularly. Therefore, it can be considered that the reaction force exerted by the force of a human hand on the roller is relatively small. In fact, the present inventors have confirmed by experiments that the card can be stably abutted against the running reference surface if the biasing force of the roller is 0.5 N or more per roller.

If the urging force of the roller is too large, the resistance in the traveling direction increases when the card (101) is conveyed, so that a smooth operation feeling of the card (101) cannot be obtained or the surface of the card (101) cannot be obtained. Scratches can have adverse effects. The inventor has also conducted an experiment on this upper limit and confirmed that no problem occurs if the upper limit is set to 1.5 N or less.

Therefore, from the above result, the card (10
1) The urging force of the roller that presses
In the present embodiment, it is set to a range of 0.5N or more and 1.5N or less.

In the configuration of the present embodiment described above, the surface of the card (101) pressed by the roller is different from the surface on which the hologram patterns for reading information are arranged. However, the above configuration is not an essential configuration of the present invention, and may be the same surface, or may be a configuration in which information is read from a card using a transmission diffraction image instead of a reflection diffraction image. is there.

[0040]

As described above, in the manual optical recording medium reader according to the present invention, the provision of the card shifting mechanism enables the card to be stably moved to the reference plane side and has a good CG.
Since the reading of the H data is performed, it is not necessary to specially manage the thickness variation accuracy of the card and the accuracy of the reader, and it is possible to provide a less expensive card and a reader.

That is, "(Claim 1) guide means for conveying a card-shaped optical recording medium having a hologram pattern for generating a diffraction image in response to irradiation of monochromatic light arranged on the surface or inside thereof along a guide groove; An optical pickup device for taking an image of a diffraction image of the hologram pattern arranged on the optical recording medium inserted in the guide groove and reading information, and conveyed along the guide groove. At least four optical discs for rotatably abutting against one surface of the optical recording medium and slidingly abutting the other surface on the inner wall surface of the guide groove to perform relative positioning between the hologram pattern and the optical pickup means. And a monochromatic light emitted from the optical pickup means is always radiated in a range surrounded by each of the guide roller means. Wherein the guide roller means is arranged so that the hologram pattern to be positioned is located. ", So that the card is stably brought into contact with the travel reference surface of the reader, It is possible to provide an inexpensive optical recording medium reading device that maintains the relative position between the hologram pattern and the optical pickup means in a regular and stable manner. In particular, `` a guide groove for inserting a card-shaped optical recording medium having a hologram pattern that generates a diffraction image in response to irradiation of monochromatic light arranged on the surface or inside thereof, and carrying by an external force, and the inserted optical recording medium In an optical recording medium reading apparatus having an optical pickup means for taking a diffraction image and reading information, an optical recording medium is rotatably brought into contact with one surface of the conveyed optical recording medium and pressed to press the other surface with the guide groove. At least four guide roller means for slidingly contacting the inner wall surface and performing relative positioning between the hologram pattern and the optical pickup means are provided, and each of the guide roller means is in contact with the optical recording medium. The hologram pattern is formed at a position where the optical pickup means is internally divided at an internal division ratio of 1: 1 to 1: 2 in the short side and long side directions of the rectangle to be formed. Since the optical recording medium reader. ", Characterized by being configured to perform Luo information reading, the effect of performing relative positioning of the optical pickup means and the hologram pattern more stably is applied.

Further, ((Claim 2) The guide roller means is provided at least four times with respect to the optical recording medium at the reading position of all hologram patterns on the optical recording medium.
2. The optical recording medium reading device according to claim 1, comprising a plurality of contact points. , The effect of enabling stable information reading for all hologram patterns arranged on the card is added.

Further, the present invention is characterized in that each of the guide roller means is in contact with the optical recording medium and is 0.5 N or more and 1.5 N or more.
3. The optical recording medium reader according to claim 1, wherein the optical recording medium is pressed by the following force. , So that the pressing force on the card is at the optimum level, preventing problems such as tilting the card away from the running reference surface, worsening the operational feeling during manual card transport, and damaging the card. The added effect is added.

[Brief description of the drawings]

FIG. 1 is a plan view of an optical recording medium reading device according to the related art.

FIG. 2 is a side view of an optical recording medium reading device according to the related art.

FIG. 3 is a perspective view illustrating a hologram pattern reading operation by an optical pickup means.

FIG. 4 is a cross-sectional view of an optical recording medium reading device according to the related art.

FIG. 5 is a cross-sectional view of an optical recording medium reading device according to the related art.

FIG. 6 is a plan view of an optical recording medium reading device according to an embodiment of the present invention.

FIG. 7 is a side view of an optical recording medium reading device according to an embodiment of the present invention.

FIG. 8 is a layout diagram of rollers of the optical recording medium reading device according to one embodiment of the present invention.

FIG. 9 is a layout diagram showing a positional relationship between a roller and a card of the optical recording medium reading device according to one embodiment of the present invention.

FIG. 10 is a sectional view of an optical recording medium reading apparatus according to an embodiment of the present invention.

DESCRIPTION OF SYMBOLS 100 Optical recording medium reader 101 Card (optical recording medium) 102 Guide groove (guide means) 103 Laser light source (optical pickup means) 104 Mirror (optical pickup means) 105 Image pickup device (optical pickup means) 106 Hologram Pattern row (hologram pattern) 107 Guide roller mechanism (guide roller means) 109 (hologram pattern) reading position

Claims (3)

[Claims] 1. A guide means for conveying a card-shaped optical recording medium having a hologram pattern for generating a diffraction image in response to irradiation of monochromatic light arranged on the surface or inside thereof along a guide groove, and inserted into the guide groove. An optical pickup means for taking an image of a diffraction image of the hologram pattern arranged on the optical recording medium and reading the information, the optical recording medium being conveyed along the guide groove. At least 4 which rotatably abuts and abuts the other surface while sliding the other surface against one inner wall surface of the guide groove to relatively position the hologram pattern and the optical pickup means.
A plurality of guide roller means, and the guide roller means is arranged such that the hologram pattern irradiated with monochromatic light emitted from the optical pickup means is always positioned within a range surrounded by the respective guide roller means. An optical recording medium reading device characterized by the above-mentioned. 2. The optical recording apparatus according to claim 1, wherein said guide roller means has at least four contact points with said optical recording medium at all hologram pattern reading positions on said optical recording medium. Media reader. 3. The optical recording medium reading device according to claim 1, wherein each of the guide roller means comes into contact with the optical recording medium and presses the optical recording medium with a force of 0.5 N or more and 1.5 N or less. apparatus.