JP2000194794A - Optical information reader and optical recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reader capable of easily, speedily and surely reading a CGH while facilitating the alignment of the CGH. SOLUTION: When a hologram viewing device 1 is placed on an optical recording medium 10 provided with a CGH 9 at a prescribed position, by viewing a diffusing plate 5 irradiated with direct reflected light reflecting monochromatic light outputted from a light emitting part 2 on the CGH 9, an aperture part 6 of the hologram viewing device 1 and the CGH 9 can be aligned. At such a time, light diffracted by the CGH 9 is projected through mirrors 31-33 to a screen 4 and by recognizing that light, the truth/false of a card can be easily discriminated.

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 on which information is recorded as a hologram image and the like, and an optical information reading apparatus for reading information from the optical recording medium. The present invention relates to an optical recording medium such as a prepaid card, a credit card, a cash card, a certification card and the like, and an optical information reading apparatus that allows information recorded on the optical recording medium to be visually recognized with a simple configuration.

[0002]

2. Description of the Related Art Prepaid cards, credit cards,
For recording media such as cash cards and certification cards,
It is necessary to identify whether the content or the recording medium itself has been illegally forged or altered. As one method of identifying the recording medium, a hologram is used for a credit card, a bank card, and the like. The hologram enables a single hologram image to be visually recognized by interference of white light. However, since this hologram can record only a single hologram image such as a manufacturer's mark at present, it cannot be said that it has a sufficient function for preventing unauthorized use or forgery, and the amount of recordable information is limited. Therefore, the present applicant has proposed a recording medium using a hologram that is effective in preventing unauthorized use and forgery.
An optical recording medium to which GH (Computer Generated Hologram) is applied (Japanese Patent Application Laid-Open No. 10-198259) and a recording / reproducing apparatus for such an optical recording medium (Japanese Patent Application No. 10-5882).
No. 4).

FIG. 15 shows an example of a reproducing optical system in this recording / reproducing apparatus (recording / reproducing apparatus for a reflection type optical recording medium).
The optical system unit 120 includes a laser beam irradiation device 121
And a CCD (imaging element) 122 are provided integrally, and are provided substantially in parallel with the transport direction of the optical recording medium 10, that is, a plurality of hologram patterns (CGH) serving as an information recording unit.
It is configured to be able to move with high precision in the arrangement direction. The laser beam irradiation device 121 is arranged obliquely so as to irradiate a laser beam at an incident angle i with respect to the upper surface of the optical recording medium 10 located in the transport system 110. CCD122
Are arranged obliquely so that the diffracted light diffracted at an angle a by the optical recording medium 10 is incident at an angle i + θ. The laser beam irradiation device 121 and the CCD 122 are arranged so that θ = 2 (90 ° −i) ± a, and the CCD 122 receives the diffracted light diffracted by the information recording section of the optical recording medium 10. Is configured to read recorded data from a reproduced image.

[0004]

A conventional hologram-attached credit card or cash card is applied as authentication by visually judging a pattern unique to a company or a bank. This hologram pattern has a large display area, and its hologram image can be easily distinguished, but this also leads to facilitation of forgery or alteration of the card at the same time. That is, if a hologram can be created, a pseudo image can be produced relatively easily, and it has not been possible to completely prevent the production of a counterfeit product.

In a system to which an optical recording medium (Japanese Patent Application Laid-Open No. 10-198259) and a recording / reproducing apparatus (Japanese Patent Application No. 10-58824) proposed by the present applicant have been applied, each hologram pattern has one side. Is about a few hundred μm, so it is quite small, and it can record a large amount of information. In addition, it is necessary to read only the diffracted light to read the information, so prevent unauthorized use. Is possible. However, in order to read information from an optical recording medium, a recording / reproducing device with high reading accuracy is required, which complicates the configuration, makes it difficult to reduce the size and weight, and increases the cost. It was not suitable.

Accordingly, the present invention makes it possible to easily determine whether or not the recording medium is a legitimate recording medium by applying the optical recording medium using CGH previously proposed by the present applicant, and it is extremely difficult to forge. It is an object of the present invention to provide an optical recording medium and an optical information reading device capable of reading information from the optical recording medium with a simple configuration.

[0007]

SUMMARY OF THE INVENTION As means for achieving the above object, an object is to provide the following optical information reading apparatus and optical recording medium. In the present invention, at least one hologram pattern (information recording section) configured to project a predetermined pattern by the diffracted light is provided at a predetermined position of the recording medium, and the hologram pattern is irradiated with monochromatic light, and the diffracted light is irradiated. Is formed on the display window, a predetermined reproduction video pattern recorded in the hologram pattern is projected and becomes visible, or authenticity is determined by recognizing the reproduction video pattern by the light receiving element and performing image processing. It is something to do.
With such a configuration, it is possible to provide a simple and lightweight optical information reading device, so that it is possible to easily identify whether the optical recording medium is genuine or not.
It can be performed in many places such as stores.

[0008] 1. An optical information reading device for reading information from an optical recording medium having an information recording unit capable of reading information from diffracted light when monochromatic light is applied, wherein the monochromatic light is transmitted to the information recording unit of the optical recording medium. A light emitting means for irradiating, a display window for projecting information indicated by diffracted light that is monochromatic light output from the light emitting means and irradiated to the information recording unit, and diffracted light diffracted by the information recording unit. An optical system that guides an image to the display window and forms an image, and a diffusion member that diffuses direct light generated together with diffracted light in the information recording unit, wherein the diffusion member transmits information from the information recording unit of the optical recording medium to the information recording unit. An optical information reading device, wherein the optical information reading device is provided at a position where direct light from the information recording unit shines when the device is at a position where reading is possible.

[0009] 2. An optical information reading device for reading information from an optical recording medium having an information recording unit capable of reading information from diffracted light when monochromatic light is applied, wherein the monochromatic light is transmitted to the information recording unit of the optical recording medium. A light emitting means for irradiating, a display window for projecting information indicated by diffracted light that is monochromatic light output from the light emitting means and irradiated to the information recording unit, and diffracted light diffracted by the information recording unit. An optical information reading apparatus, comprising: an optical system that guides an image to the display window to form an image; and a contact unit that regulates the optical recording medium at a position where information can be read from the information recording unit.

[0010] 3. 3. The optical information reading device according to 1 or 2, wherein the receiving unit reads rewritable information recorded on the optical recording medium at a different position from the information recording unit, and the information recording device provided on the optical recording medium. An imaging device that captures information represented by diffracted light from the unit and converts the information into an electric signal, and a collation unit that collates information from the imaging device with information from the reception unit are provided, and the optical system includes:
It is configured such that the diffracted light diffracted by the information recording unit of the optical recording medium is imaged on the display window while being imaged on the image pickup device, and the rewritable information is read together with the information of the information recording unit. In such a case, the optical information reading apparatus is configured to output a result of the comparison by the comparison means.

4. An optical recording medium having an information recording unit on which information is recorded by CGH, wherein the diffracted light and the direct light output from the information recording unit when the information recording unit is irradiated with monochromatic light have a predetermined angle or more. An optical recording medium characterized by having an angle of:

5. A first information recording unit in which information is rewritably recorded by a plurality of holograms, and a second information recording unit in which rewritable information is recorded in an area different from the first information recording unit. Wherein the rewritable information recorded in the second information recording section includes the same information as the information recorded in the first information recording section. recoding media.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the optical information reading apparatus of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view showing an embodiment of the optical information reading apparatus of the present invention, and FIG. 2 is a partially transparent perspective view showing an embodiment of the optical information reading apparatus of the present invention.

In each of the drawings, a reflective CGH (Computer Generated H) on which image information is recorded is recorded on an optical recording medium 10.
ologram (information recording unit) 9 is attached or molded. The CGH 9 forms a hologram pattern by performing a calculation using a computer such that a plurality of diffraction gratings rotated in a plane including the diffraction grating are arranged so that bright points are arranged two-dimensionally. A reproduced image is obtained from the diffracted light. As the CGH (hologram) used in the present invention, for example, a monthly magazine “Oplus E” (published by Shin-Technologies Communications Co., Ltd .; No. 20)
4: November 1996).

The hologram viewing device (optical information reading device) 1 includes a light emitting section (light emitting means) 2 for outputting monochromatic light of a predetermined wavelength, such as a monochromatic laser, and a light output from the light emitting section 2 and reflected light. Mirrors (optical systems) 31 to 33 for reflecting the diffracted light reflected by the type CGH 9, reflection type CGH 9
A screen 4 for displaying image information of the hologram recorded in the CGH 9 and a diffusion plate (diffusion means) 5 for diffusing the direct light reflected by the reflection type CGH 9, and the reflection type CGH 9 is provided on the bottom surface.
An opening 6 having a size substantially equal to the size of the opening 6 is provided. Then, the hologram viewing device (optical information reading device) 1 is placed on the optical recording medium 10 so that the optical recording medium 10
The image information of the hologram recorded on the reflection type CGH 9 is displayed on the screen 4 and can be visually recognized.

Specifically, when a switch (not shown) is turned on, the monochromatic light output from the light emitting section 2 is reflected by the mirror 31.
And irradiates the opening 6 at the bottom of the housing. Then, when the reflection type CGH 9 comes to the position of the opening 6, the direct light reflected by the reflection type CGH 9 is irradiated to the diffusion plate 5 and diffused, and this portion looks bright. At this time, the first-order diffracted light diffracted by the reflection type CGH 9 is enlarged to an appropriate size while being reflected by the mirrors 32 and 33.
Image information is displayed on the screen 4.

Here, the CGH 9 has a unique diffraction angle, and image information is not projected on the screen 4 unless light is irradiated from a correct direction. For this reason, when there is no diffusion plate 5, it is difficult to display an image on the screen 4, and it is not even known whether the CGH 9 is illuminated. In addition, if the position is adjusted while looking at the location of the CGH 9, there is a risk that the monochromatic light or the reflected direct light may be directly viewed. Therefore, in the present embodiment, the direct light cannot be viewed. For this reason, in order to detect the position of the CGH 9, the direct reflection light from the reflection type CGH 9 is applied to the diffusion plate 5 provided in the housing, and when the CGH 9 comes to the position of the opening 6, the diffusion plate is The hologram viewing device 1 is rotated in the horizontal direction on the optical recording medium 10 in this state so that the reflected direct light shines on the optical recording medium 5.
The direction is adjusted by searching for the position where the diffracted light from the CGH 9 is projected on the screen 4. By doing so, the CGH9 can be safely and reliably provided without directly viewing the light.
Information can be read.

The CGH 9 forms interference fringes as finely as possible, so that when monochromatic light is irradiated, the diffracted light output from the CGH 9 and the directly reflected light have a predetermined angle (for example, when the angle indicated by Θ in FIG. The CGH 9 is designed to open as wide as possible (22.5 degrees) or more, so that the directly reflected light output from the CGH 9 does not flow into the mirror 32.

FIGS. 3 to 6 show specific examples of the use of such a hologram viewing device 1. FIG. FIG. 3 and FIG. 4 are diagrams showing examples in which the optical recording medium 10 is used for a credit card, a cash card, an identification card, or the like. In each figure, the information recorded on the CGH 9 of the optical recording medium 10 is, for example, a CGH in the case of being formed large.
In the case 9a, forgery can be made difficult by recording hologram data of three or more values so as to obtain a desired image and recording a complicated image (see FIG. 3). When the CGH 9b is formed in a small size, binary hologram data is formed to display a character or symbol pattern. For example, the card issue number, the owner, the manufacturer, and the contract information are stored in the CGH 9b. And information such as credit information can be encrypted and recorded (see FIG. 4). The size of CGH is 100 μm on one side.
If it is a square of m or more, its function can be satisfied, so the size and recorded contents are not limited to large or small ones, and are free.

In order to read out the CGH 9 from the optical recording medium 10, the hologram viewing device 1 is used to read the optical recording medium 10 in a state where the directly reflected light from the CGH 9 hits the diffusion plate 5 and becomes bright, as described above. It is sufficient that the direction is adjusted by searching the position where the diffracted light from the CGH 9 is projected on the screen 4 by rotating in the horizontal direction above. In addition, assuming that reading is performed from the large CGH 9a, the hologram viewing device 1 is moved in the direction shown in FIG. 4 from the state shown in FIG. Is natural. Therefore, by forming the CGH 9 so that it can be read in this direction, it becomes possible to read without rotating the hologram viewing device 1.

Then, by sequentially moving the hologram viewing device 1 from the state of FIG. 3 to the state of FIG. 4, the image information recorded on the small CGH 9b is succeeded by the image information recorded on the large CGH 9a. Characters and symbols can be read sequentially.

FIGS. 5 and 6 are views showing an example in which a passport is used as the optical recording medium 10. FIG. In FIG. 5, when a CGH 9 is provided inside the passport (optical recording medium 10) to record information of images, characters, and symbols, and used for identification of the passport and prevention of forgery, the hologram viewing device 1 uses the information. This shows the state of reading. FIG. 6 shows an image in which a CGH having three or more values is formed on the cover of the passport (optical recording medium 10) so that an image unique to each country can be obtained. Even in the case of these passports, information can be read in the same manner as in the case of the card described above.

Next, another embodiment of the hologram viewing device (optical information reading device) will be described. FIG. 7 is a perspective view showing an example of the hologram viewing device 11 that can read the CGH 9 when the optical recording medium 10 is on a card. The hologram viewing device 11 shown in the figure is provided with a slit 7 into which the card-shaped optical recording medium 10 is inserted, and the optical system of the hologram viewing device 11 and the position of the CGH 9 of the optical recording medium 10 in the depth direction match. The slit 7 is provided at such a depth. The information recorded on the CGH 9 of the optical recording medium 10 can be read by passing the optical recording medium 10 through the slit 7.

Here, the information of characters and symbols can be identified if they can be seen for a moment, but in the case of image information, the information can be stably displayed for a certain period of time in order to determine the authenticity of the image. Is more convenient. Therefore, in the example of the hologram viewing device 12 shown in FIGS. 8 and 9, the contact portion 8 is provided at one end of the slit 7, and when the optical recording medium 10 inserted into the slit 7 contacts the contact portion 8. In addition, the optical system of the hologram viewing device 12 is configured to come on the CGH 9a on which the image information is recorded, so that the image information can be displayed stably.

In this case, the initial position for reading information on the optical recording medium 10 is defined by the contact section 8, so that when the optical recording medium 10 is inserted until it comes into contact with the slit 7, the image of the CGH 9a is automatically displayed. It is projected on the screen 4.
By visually observing the image projected on the screen 4, the authenticity of the optical recording medium (card) 10 can be easily determined. Thereafter, by manually sliding the optical recording medium 10 in the direction of the arrow shown in FIG. 9, the information in the column of the CGH 9 b can be sequentially confirmed. When the contact portion 8 is provided, the image can be automatically projected, and thus the diffusion plate 5 may not be provided.

Next, a card-type optical recording medium which is an embodiment of the optical recording medium of the present invention will be described. A card-type optical recording medium 20 shown in FIG. 10 is a recording medium called a contact type IC card, and has an IC module 24 and an emboss area 22, and further has a magnetic recording area 23.
Some have. Although not shown, a non-contact IC card similarly has an IC module, an emboss area, and a magnetic recording area depending on the type. Further, the magnetic card has a magnetic recording area and an emboss area. In these cards, since each area occupies a unique area on the card, it is necessary to provide the CGH 9 avoiding these positions. In the case of the contact type IC card 20 shown in FIG. 10, the CGH 9 is formed in the hologram recording area 21 indicated by oblique lines in the figure. And
In the figure, 19.1mm to 29.8mm from the top of the card and from the left
The hologram recording area 21 is formed within a range of 20 mm to 85 mm. Specifically, card molding, embossing,
It is desirable to form the magnetic recording film within the range of 21 mm to 26 mm from the upper end of the card and 22 mm to 60 mm from the left end depending on the conditions of the formation of the magnetic recording film and the installation of the IC module. At this time, as shown in FIG. 11, the small CGH may be formed as a plurality of rows (three rows in FIG. 11) of CGH groups 29 in a range substantially the same as the width of the large CGH. Thus, the hologram recording area 21
Are formed in areas other than the magnetic recording area 23, the IC module 24, and the emboss area 22.

FIG. 12 is a diagram for explaining a method for recording card-specific information in the CGH group 29 when issuing a card. Here, recording information in the CGH group 29 means that a predetermined number of CGHs 9 in the CGH group 29 are destroyed, and the entire CGH group 29 has meaning according to the number. The destruction of CGH 9 is performed by melting and destructing CGH 9 by laser 30 as shown in FIG. Alternatively, the CGH 9 may be physically crushed by an impact type (not shown). Which CGH 9 is to be specifically destroyed is determined by the combination. Combination fracture, for example as shown in FIG. 13, of the 10 CGH9, when so always destroy five and may have the meaning of _five different ₁₀ C. In this case, even if an unauthorized person destroys one CGH 9 in an attempt to rewrite the combination, the number of non-destructive CGHs 9 is reduced and the number of CGHs 9 is reduced to five, so that the data of CGH 9 becomes meaningless. CGH9 is also an irreversible memory,
Since it is impossible to reproduce the destroyed CGH 9, rewriting cannot be performed. If CGH9 is to be reproduced, it is necessary to take a replica of CGH9 or analyze the contents, and the method is extremely complicated. In addition, for example, C having three rows of ten CGHs 9
In the case of GH group 29, by providing a means to destroy the 15 of the 30 amino CGH9, ₃₀ C ₁₅ = approximately 1.
500 million expressions can be performed, and it becomes possible to issue cards having different IDs for the Japanese population.

The CGH on the card type optical recording medium 20
Since data recording to the group 29 is performed when the card is issued, FIG.
The recording device as shown in FIG. 2 may be installed only in a factory or a card issuing office. Therefore, the apparatus installed in a store or the like where the card needs to be identified may be provided with optical information reading apparatuses (hologram viewing apparatuses) 1, 11, and 12 as shown in FIGS. good. However, the CGH group 29 as shown in FIG.
In order to read the data, it is necessary to divide the number of light-emitting beams output from the light-emitting unit 2 by the number of columns of the CGH 9 using a beam splitter or the like. .

Further, the contact type I as shown in FIG.
Optical information reading device (hologram viewing device) for reading CGH 9 from card type optical recording medium 20 which is a C card
13 is shown in FIG. The hologram viewing device 13 shown in FIG. 14 includes a light emitting unit (light emitting unit) 2 such as a monochromatic laser.
Mirrors (optical systems) 31 and 32 for reflecting the light output from the light emitting section 2 and the diffracted light reflected by the reflective CGH (first information recording section) 9, the half mirror 34, and the reflective C
A screen 4 for displaying image information of the hologram recorded on the GH 9, a diffusing plate 5 for dispersing the direct light reflected by the reflective CGH 9 (may be omitted), and an optical system for diffracting the light reflected by the reflective CGH 9. Device 35 that receives an image via the IC module (second information recording unit) 24 of the card-type optical recording medium 20 and the information received by the image sensor 35 are compared to output a result. Signal processing unit (collating means) 37 for displaying the collation result or host center 4
0, and a slit 7 having a contact portion 8. Further, on the upper surface in the slit 7, an IC is provided.
An IC contact (receiving unit) 36 for receiving an information signal from the module 24 and an opening 6 substantially equal in size to the reflective CGH 9 are provided. Then, the card-type optical recording medium 20 is inserted into the slit 7 of the hologram viewing device 13 until the card-type optical recording medium 20 comes into contact with the contact portion 8, so that the image information of the hologram recorded on the reflection type CGH 9 of the card-type optical recording medium 20 and the IC The information recorded in the module 24 can be checked and the result can be output.

Specifically, by inserting the card type optical recording medium 20 into the slit 7, a switch (not shown) is turned on, and the monochromatic light is output from the light emitting section 2. This light is reflected by the mirror 31 and applied to the opening 6 provided on the upper surface of the slit 7. Then, the card type optical recording medium 20 comes into contact with the contact portion 8 and the reflection type CGH 9
, The direct light reflected by the reflection type CGH 9 is irradiated to the diffusion plate 5 and diffused, and this portion looks bright. At this time, the first-order diffracted light diffracted by the reflection type CGH 9 is enlarged to an appropriate size while being reflected by the mirror 32 and the half mirror 34, and the image information is displayed on the screen 4. By visually recognizing this, the authenticity of the card can be easily determined. At the same time, when the card-type optical recording medium 20 comes into contact with the contact portion 8, information recorded on the IC module is electrically transmitted via the IC contact 36 which comes into contact with the IC module 24 which is a rewritable recording portion. The signal is received as a signal and output to the signal processing unit 37.

Next, the image projected by moving the card-type optical recording medium 20 and sequentially projecting monochromatic light onto the CGH group 29 is transmitted through the half mirror 34 to the image pickup device 3.
5, the captured image is subjected to pattern recognition, converted into an electric signal, and output to the signal processing unit 37.

The signal processing section 37 compares the information from the CGH 9 supplied from the image pickup device 35 with the recorded contents of the IC module 24 supplied from the IC contact 36 to perform data collation and authenticity judgment. Output unit 38
Output the result to The data output unit 38 is, for example, an LED
And the like, and illuminates and displays whether or not the data is authentic. Alternatively, a data transmission unit using, for example, infrared communication, a LAN line, a WAN (Internet) line, a public (dedicated, private) telephone line, or the like is provided in place of the data display unit, and the host center 40 is inquired about authenticity and communicates the result. It may be configured as follows.

If the card type optical recording medium 20 is determined to be an authentic card, permission to use the card is given.
For example, if the data recorded in the IC module 24 is rewritten, the data does not match the irreversible CGH 9 data that cannot be rewritten, and the use of the card as NG is stopped, and it is determined that the card is an unauthorized card. Then, a predetermined process is performed to make the card unusable, and the information of this card is also transmitted to the host center 40. Also, when the use permission of the card is issued, for example, when the card is a credit card, the hologram viewing device 13 is
By incorporating it into a terminal or the like, a predetermined accounting process can be performed.

In this embodiment, the IC contact 36 is provided to collate with data recorded in the IC module 24. However, a magnetic information reproducing unit (receiving unit) is provided to The information recorded in the recording area (second information recording unit) 23 and the information of the CGH 9 may be collated. In this case, the information recorded in the magnetic recording area 23 is sequentially read out by the magnetic information reproducing unit at the same time that the card type optical recording medium 20 is moved and the information of the CGH group 29 is sequentially imaged by the imaging element 35. Will be. Then, if the information recorded in the magnetic recording area 23 is altered and does not match the information in CGH 9, it is determined that the card is an unauthorized card.

In the optical information reading apparatus and the optical recording medium of the present invention, since the CGH is formed at a predetermined position and the CGH at the position is read, it is an effective countermeasure against forgery and falsification. . In the case of manufacturing and using illicit magnetic cards, a CGH configured to project a predetermined mark or the like must be manufactured using a considerably large-scale drawing apparatus and a molding apparatus, and considerable capital investment is required. And the financial benefits of fraud are lost.

In the above-described embodiment, the optical recording medium uses two types of CGHs, a large CGH on which an image is recorded and a CGH on which characters and symbols are recorded. It is clear that the use of CGH, which is almost impossible, has much higher security than a conventional rewritable magnetic recording or card having only an IC module. Optical recording media having the above basic structure are not only credit cards, but also cash cards, prepaid cards, identification cards, student cards, licenses, passports, health insurance cards, medical records, medical cards, membership cards, admission cards Tickets, commuter passes, tickets,
It can be applied as a medium for gift certificates, securities, amusement cards, electronic commerce cards, automatic toll payment cards, electronic publishing, software media, performance management cards, ID cards, electronic voting certificates, and the like.

[0037]

According to the optical information reading apparatus of the present invention, a diffusing member is provided at a position where direct light from the information recording section shines when the information recording section of the optical recording medium is at a position where information can be read from the information recording section. Therefore, it is possible to easily read the information recorded in the information recording unit without directly viewing the light only by adjusting the position so that the diffusion member becomes bright. The information recorded in the information recording unit is displayed on the display window and becomes visible, so that the user can recognize that the card is a genuine card with his / her own eyes. is there.

Further, the optical information reading apparatus of the present invention
A contact section that regulates the optical recording medium is provided at a position where information can be read from the information recording section, so simply by placing the optical recording medium at the position where it contacts the contact section, it is easy to see without direct light. Information recorded in the information recording unit can be read. The information recorded in the information recording unit is displayed on the display window and becomes visible, so that the user can recognize that the card is a genuine card with his / her own eyes. is there.

Further, when a receiving section for reading information recorded at a position different from the information recording section and a collating means for collating the information from the receiving section with the information from the information recording section are provided, the collation can be easily performed. It is possible to judge fraudulently, and an effect of deterring fraudulent cards and suppressing production can be expected. In addition, since the user has excellent security and can recognize that the card is a genuine card with his / her own eyes, the user can use the card with peace of mind.

The optical recording medium of the present invention is an optical recording medium having an information recording section on which information is recorded by CGH,
Since the diffracted light and the direct light output from the information recording unit when the information recording unit is irradiated with monochromatic light have an angle equal to or greater than a predetermined angle, the diffracted light and the direct light are separated with a simple configuration,
It can be used for information reading and positioning.

Further, the optical recording medium of the present invention has a first information recording section in which information is recorded in a non-rewritable manner by a plurality of holograms, and a rewritable area different from the first information recording section. A second information recording section on which information is recorded, and the rewritable information recorded on the second information recording section has the same content as the information recorded on the first information recording section. Since the information is included, the information recorded in the first information recording unit and the information recorded in the second information recording unit are read out and collated, thereby making it possible to easily determine the impropriety. As a result, the security is excellent for the user, and there is an effect that the optical recording medium can be used with security.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an information reading device of the present invention.

FIG. 2 is a partially transparent perspective view showing an embodiment of the information reading apparatus of the present invention.

FIG. 3 is a diagram for explaining a usage example of an embodiment of the information reading apparatus of the present invention.

FIG. 4 is a diagram for explaining a usage example of an embodiment of the information reading apparatus of the present invention.

FIG. 5 is a diagram for explaining another example of use of an embodiment of the information reading apparatus of the present invention.

FIG. 6 is a diagram for explaining another example of use of an embodiment of the information reading apparatus of the present invention.

FIG. 7 is a perspective view showing another embodiment of the information reading apparatus of the present invention.

FIG. 8 is a partially transparent perspective view showing still another embodiment of the information reading apparatus of the present invention.

FIG. 9 is a partially transparent perspective view showing still another embodiment of the information reading apparatus of the present invention.

FIG. 10 is a plan view showing an example of a card-type optical recording medium which is an embodiment of the optical recording medium of the present invention.

FIG. 11 is a plan view showing another example of a card-type optical recording medium which is an embodiment of the optical recording medium of the present invention.

FIG. 12 is a diagram for explaining a recording method for recording CGH data on a card-type optical recording medium.

FIG. 13 is a diagram illustrating an example of a CGH data sequence recorded on a card-type optical recording medium.

FIG. 14 is a sectional view showing still another embodiment of the information reading apparatus of the present invention.

FIG. 15 is an enlarged schematic diagram for explaining an example of an imaging portion of a conventional information reading device.

[Explanation of symbols]

1, 11, 12, 13 Hologram viewing device (optical information reading device) 2 Light emitting section (light emitting means) 4 Screen (display window) 5 Diffusion plate (diffusion means) 6 Opening 7 Slit 8 Contact section 9, 9a, 9b CGH (information recording section, first information recording section) 10, 20 optical recording medium 21 hologram recording area 22 emboss area 23 magnetic recording area (second information recording section) 24 IC module (second information recording section) 29 CGH group 31 to 33 mirror (optical system) 34 half mirror (optical system) 35 image sensor (imaging unit) 36 IC contact (receiving unit) 37 signal processing unit (collating unit) 38 data output unit 40 host center

Continued on the front page F term (reference) 2K008 AA13 AA17 CC01 CC03 FF27 HH18 HH23 HH27 5B047 AA30 BC05 BC09 5B072 CC35 DD01 LL00 MM11 5D119 AA38 BA02 BB01 CA09 DA05 FA05 JA70 KA03 LB07

Claims (5)

[Claims] 1. An optical information reading apparatus for reading information from an optical recording medium having an information recording section capable of reading information from diffracted light when irradiated with monochromatic light, comprising: A light emitting unit for irradiating the information recording unit; a display window for projecting information indicated by diffracted light obtained by irradiating the information recording unit with monochromatic light output from the light emitting unit; An optical system for guiding the diffracted light to the display window to form an image, and a diffusing member for diffusing direct light generated together with the diffracted light in the information recording unit, wherein the diffusing member is provided on the optical recording medium. An optical information reading device, wherein the optical information reading device is provided at a position where direct light from the information recording unit shines when the information recording unit is at a position where information can be read from the information recording unit. 2. An optical information reading apparatus for reading information from an optical recording medium having an information recording portion capable of reading information from diffracted light when irradiated with monochromatic light, comprising: A light emitting unit for irradiating the information recording unit; a display window for projecting information indicated by diffracted light obtained by irradiating the information recording unit with monochromatic light output from the light emitting unit; An optical system that guides the diffracted light to the display window to form an image, and a contact portion that regulates the optical recording medium at a position where information can be read from the information recording unit. Optical information reading device. 3. The optical information reading device according to claim 1, wherein the receiving unit reads rewritable information recorded on the optical recording medium at a different position from the information recording unit, and the optical recording device. An imaging device that captures information indicated by diffracted light from the information recording unit provided on a medium and converts the information into an electric signal; and a matching unit that matches information from the imaging device with information from the receiving unit. The optical system is configured to form an image of the diffracted light diffracted by the information recording unit of the optical recording medium on the display window and to form an image on the image sensor, together with the information of the information recording unit. An optical information reading apparatus, wherein when the rewritable information is read, a comparison result of the matching means is output. 4. An optical recording medium having an information recording section on which information is recorded by a CGH, wherein the information recording section is irradiated with monochromatic light, and diffracted light and direct light output from the information recording section. Has an angle greater than or equal to a predetermined angle. 5. A first information recording section in which information is rewritably recorded by a plurality of holograms, and a second information recording section in which rewritable information is recorded in an area different from the first information recording section. Information recording section, and the rewritable information recorded in the second information recording section includes information having the same content as the information recorded in the first information recording section. An optical recording medium characterized by the above-mentioned.