JPH09212919A - Optical information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to perform label print to display a recorded content in a sufficiently large area without deteriorating the reproducing characteristics on an optical beam incident surface. SOLUTION: A first reflecting layer 103 and a second reflecting layer 106 are laminated via an adhesive layer 107. The contents of the information and the related item recorded on the first and second information surfaces 102 and 105 of the ink having different transmission spectra in a visible light region are displayed on first transparent board 101 and second transparent board 104 on the surface of the side that the reproduced beams of the board 101 and/or the board 104 are incident.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display of a visible image pattern on an optical information recording medium having a recording section for recording information and irradiating a laser beam to record and reproduce information.

[0002]

2. Description of the Related Art Conventionally, two disks are bonded together.
A laser disc (hereinafter, referred to as LD: Laser Disc) is widely used as a pasting type optical information recording medium. In the case of the LD, the display of the content related to the recorded information (eg, the title of the disc, the title of the recorded music or video, the release maker, etc.) is displayed at the center of both sides of the disc at an outer diameter of about 108 mm and an inner diameter of about 108 mm. 35mm
This is done by sticking label paper of the same size.

In the case of LD, since the area of the label paper is sufficiently large, even if the contents are displayed on the label paper as described above,
Visibility can be sufficiently ensured.

On the other hand, a digital video disk (hereinafter referred to as DVD: Digital) whose recording density is about 6 to 8 times higher than that of a CD.
Video Disk. ). FIG. 5 shows a conventional DVD
The structural diagram of the cross-sectional structure of is shown. DVD as shown in FIG.
Has a diameter of 120 mm and a thickness of 0.
A 6 mm first transparent substrate 501 and a second transparent substrate 50 having no information surface 502 and a diameter of 120 mm and a thickness of 0.6 mm.
5 and the adhesive layer 504 so that the information surface 502 is on the inside.
It has a structure that is pasted together.

Here, the surface of the information surface 502 is covered with a reflective layer 503 made of a metal such as aluminum (Al) that reflects most of the laser light, and the information recorded on the information surface 502 is reproduced first. 1 through the transparent substrate 501. Although not shown, the DVD includes a second transparent substrate 5
A double-sided reproduction type in which 05 has a second information surface covered with a second reflective layer, and a multi-layer type in which the first transparent substrate 501 and the second transparent substrate 505 each have two information surfaces are also available. Proposed.

[0006]

SUMMARY OF THE INVENTION However, DVD
Like a compact disc (hereinafter referred to as a CD: Compact Disc), the disc has a diameter of 120 mm, a central hole diameter of 15 mm, and a recording area start diameter is about 46 mm. The type does not have a surface for printing a label like a CD or a single-sided reproduction type optical disk, and the method of sticking a label paper at the center of the disk like an LD has a sufficient area for displaying recorded contents. There was a problem that could not be secured.

[0007]

In order to solve the above problems, according to the invention described in claim 1 of the present invention, information is optically transmitted by a transparent substrate and a light beam having at least one information surface. In a reproducible optical information recording medium, information recorded on the transparent substrate, which is made of ink that transmits the light beam on the surface of the transparent substrate on which the light beam is incident and has an absorption band in the visible region. It is characterized in that it is provided with a display of the contents of and the matters related thereto.

According to the second aspect of the present invention, in the optical information recording medium, a transparent substrate on which information is optically reproducibly recorded by transmitting a light beam, and the transparent substrate In an optical information recording medium having a reflection layer formed on a surface on which information is optically reproducibly recorded and reflecting a light beam, a light beam is formed on a surface of the transparent substrate on which the light beam is incident. It is characterized in that it is provided with a display of the content of information recorded on the transparent substrate and a matter related thereto, which is made by an ink which is transparent and has an absorption band in the visible region.

According to the invention of claim 3 of the present invention,
A transparent substrate on which information is optically reproducibly recorded by transmitting a light beam in an optical information recording medium, and a light beam formed on the surface of the transparent substrate on which information is optically reproducibly recorded. A semi-reflective layer that reflects part and transmits the rest,
A transparent resin layer formed on the semi-reflective layer, transmitting a light beam, and having information optically reproducibly recorded on a surface opposite to the first semi-reflective layer, and information of the transparent resin layer. It has a reflection layer which is formed on an optically reproducibly recorded surface and reflects the light beam, and transmits the light beam on the surface of the transparent substrate on which the light beam is incident and absorbs it in the visible range. It is characterized in that it is provided with a display of the content of information recorded on the transparent substrate and an item related thereto, which is made by an ink having a band.

According to a fourth aspect of the present invention, there is provided the optical information recording medium according to the second or third aspect,
The reflective layer is made of Au (gold).

According to a fifth aspect of the present invention, there is provided a first transparent substrate which is an optical information recording medium, on which information is optically reproducibly recorded by transmitting a light beam. 1
The first reflective layer formed on the surface of the transparent substrate on which information is recorded so as to be optically reproducible and which reflects the light beam, and the information which is transmitted through the light beam and is optically reproducibly recorded. A second transparent substrate, a second reflective layer which is formed on a surface of the second transparent substrate on which information is recorded so as to be optically reproducible and which reflects a light beam, and an adhesive layer, The first reflective layer and the second reflective layer are bonded together via the adhesive layer, and on the surface of the first transparent substrate and / or the second transparent substrate on which the light beam is incident. And a display of the content of information recorded on the first transparent substrate and the second transparent substrate and a matter related thereto, which is made of an ink that transmits a light beam and has an absorption band in the visible light region. It is characterized by.

According to a sixth aspect of the present invention, there is provided a first transparent substrate which is an optical information recording medium, on which information is optically reproducibly recorded by transmitting a light beam. 1
A first semi-reflective layer which is formed on the surface of the transparent substrate on which information is recorded so as to be optically reproducible and which reflects part of the light beam and transmits the rest; The information of the first transparent resin layer formed by transmitting the light beam and recording the information optically reproducibly on the surface opposite to the first semi-reflective layer, and the information of the first transparent resin layer. A first reflective layer formed on an optically reproducibly recorded surface and reflecting a light beam; and a second transparent substrate transmitting the light beam and recording information optically reproducibly A second semi-reflective layer formed on a surface of the second transparent substrate on which information is recorded so as to be optically reproducible and which reflects a part of the light beam and transmits the rest. Information is optically reproducibly recorded on the surface opposite to the second semi-reflective layer, which is formed on the reflective layer and transmits the light beam. A second transparent resin layer, a second reflective layer that is formed on the surface of the second transparent resin layer on which information is recorded optically reproducibly and reflects a light beam, and an adhesive layer. The first reflective layer and the second reflective layer are attached to each other via the adhesive layer, and the first transparent substrate and / or the second transparent substrate on the side where the light beam enters. The first transparent substrate, the first transparent resin layer, the second transparent substrate, and the second transparent resin layer, which are made of an ink that transmits a light beam on its surface and has an absorption band in the visible light region. It has a visible image pattern of the contents of information recorded therein and matters related thereto.

According to a seventh aspect of the present invention, there is provided an optical information recording medium according to the fourth or fifth aspect, wherein:
The first reflective layer and / or the second reflective layer are Au.
It is (Fri).

According to an eighth aspect of the present invention, there is provided an optical information recording medium, which is a transparent substrate which transmits a light beam, and information recorded, reproduced and / or recorded by the light beam formed on the transparent substrate. Alternatively, the transparent substrate, which has at least one erasable recording layer, is made of an ink that transmits the light beam on the surface of the transparent substrate on which the light beam is incident and has an absorption band in the visible region. It is characterized in that it is provided with a display of the contents of the information recorded in and the matters related thereto.

According to a ninth aspect of the present invention, there is provided an optical information recording medium, the first transparent substrate transmitting a light beam, and the information formed by the light beam formed on the first transparent substrate. Of at least one recording layer capable of recording, reproducing, and / or erasing, a second transparent substrate that transmits a light beam, and an information formed by the light beam on the second transparent substrate. It has at least one or more second recording layers capable of recording, reproducing and / or erasing, and an adhesive layer, and the first transparent substrate and the second transparent substrate have the above-mentioned adhesive layers interposed therebetween. The first recording layer and the second recording layer are laminated so as to be positioned inside, and the light beam is applied to the surface of the first transparent substrate and / or the second transparent substrate on the side where the light beam is incident. The ink is transmitted and has an absorption band in the visible light range, One transparent substrate, the first transparent resin layer, the second transparent substrate and the second transparent resin layer, and the visible image pattern of the contents of information recorded therein and matters related thereto. It is a feature.

According to the invention of claim 10 of the present invention,
The optical information recording medium according to any one of claims 1 to 9,
The ink has a UV-curable resin having a transmittance of 10% or less at a wavelength of 300 to 570 nm and a thickness of 620 to 850 nm.
A laminated optical information recording medium, characterized in that it is made of a dye having a wavelength characteristic of 80% or more of the wavelength transmittance.

According to the invention of claim 11 of the present invention,
The optical information recording medium according to any one of claims 1 to 10, wherein a smooth transparent protective layer is provided on a surface having the visible image pattern.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of a laminated optical information recording medium according to the present invention, and in particular, a laminated film prepared by laminating two discs each having one information surface on one side. It is a block diagram of a type optical information recording medium.

The first transparent substrate 101 has a first information surface 102 on which information is recorded so as to be optically reproducible. First
A pit called a pit is formed on the information surface 102, and is recorded spirally from the center of the disc. The first information surface 102 is covered with the first reflective layer 103 that reflects the reproduction laser light. In addition, in order to protect the pits etc. from dust and external shocks during manufacturing, the first
The surface of the reflective layer 103 may be covered with a protective layer.

Next, the second transparent substrate 104 also has a second information surface 105 on which information different from the content recorded on the first information surface 102 is recorded so as to be optically reproducible. A depression called a pit is also formed on the second information surface 105, and spiral recording is performed from the center of the disc. Then, the second reflective layer 106 that reflects the reproduction laser light
The second information surface 105 is covered with. Further, the surface of the second reflection layer 106 may be covered with a protective layer.

An adhesive layer 107 made of an ultraviolet curable resin or the like is applied to the first reflective layer 103 (or protective layer) of one of the two discs formed as described above, and the other disc is coated with the adhesive layer 107. 2 The reflective layer 106 (or the protective layer) is overlaid and adhered. Here, as the adhesive layer 107,
In addition to the ultraviolet curable resin, a hot melt adhesive or other adhesive such as acrylic resin and urethane resin may be used.

The reproducing laser beam 109 emitted from the optical pickup 108 is transmitted through the first transparent substrate 101 to the first information surface 102, or is transmitted through the second transparent substrate 104 and is irradiated to the second information surface 105. It When the bonded optical information recording medium is reproduced on both sides, the optical information recording medium is turned over to change the reproduction surface, or the optical pickup can be irradiated from both upper and lower surfaces.

According to the invention of the configuration shown in FIG. 1, the first
On the surface of the transparent substrate 101 and / or the second transparent substrate 104, the visible image pattern 110 of the content of the information recorded on the first transparent substrate 101 and the second transparent substrate 104 and the matters related thereto is formed on the first transparent substrate. It is made of ink having a transmission spectrum different from that of the substrate 101 and the second transparent substrate 104 in the visible light region.

As a material of the ink forming the visible image pattern 110, an ultraviolet curable resin or the like which is dyed with a dye in advance is used. At this time, the wavelength characteristic of the dye used is 30
The light transmittance at a wavelength of 0 to 570 nm is 10% or less,
A material having a light transmittance of 85% or more at a wavelength of 620 to 850 nm is used.

The dye to be used is not particularly limited as long as it does not interfere with the transmission of light in the wavelength region of 620 to 850 nm, which is the wavelength range of the reproduction laser light of CD and DVD,
For example, anthraquinone dye can be used for green, a cyanine dye for blue, and a heterocyclic dye for yellow.

FIG. 2 shows a characteristic diagram of the spectral transmittance of the anthraquinone dye as an example. As shown in the figure,
In the wavelength range of 620 to 850 nm, which is the wavelength range of the reproduction laser light, the transmittance is 85% or more, and the visible light range is 570.
When the thickness is nm or less, the transmittance is 10% or less. As the dyes of other colors, those exhibiting similar spectral transmittance characteristics are used.

A dye of any of these colors is added to a monomer of an ultraviolet curable resin to prepare a printing ink,
Contents of information recorded on the first transparent substrate 101 and the second transparent substrate 104 on the surface of the first transparent substrate 101 and / or the second transparent substrate 104 by a method such as screen printing, roll printing or gravure printing. The visible image pattern 110 of matters related to it (for example, title, sales company name, etc.) is printed. Immediately after printing, ultraviolet rays are irradiated to cure the ultraviolet curable resin, and the printed visible image pattern 110 is dried and fixed.

As described above, the spectral transmittance characteristic of the dye used in the present invention is 620 to 8 which is the wavelength range of the reproducing laser light.
Since the transmittance of 85% or more is exhibited in the range of 50 nm, for example, the visible image pattern 110 formed by the reproduction laser beam 109 (wavelength 650 nm / 635 nm) of the DVD reproducing device with the ink using the above dye is Fully transparent.

The reproduction laser beam 109 that has passed through the visible image pattern 110 passes through the first transparent substrate 101 or the second transparent substrate 104, is reflected by the first reflective layer 103 or the second reflective layer 106, and is again the first transparent layer. It is possible to reproduce the information recorded on the first information surface 102 or the second information surface 105 through the transparent substrate 101 or the second transparent substrate 104 and the visible image pattern 110, and to absorb in the visible light range. Since it has, the visible image pattern 110 can be visually confirmed.

In the optical information recording medium having the structure shown in FIG. 1, the first information surface 102 and the second information surface 10
5, a guide groove is formed in place of the pit, and the first reflection layer 10
The rewritable or write-once type optical information recording medium is also formed by forming a rewritable or write-once type recording layer of a magneto-optical recording material, a phase change material, a dye-based material or the like at the portions of the third and second reflective layers 106. Examples of can be implemented.

At present, in a DVD having a structure having one recording layer on one side as shown in FIG. 1, the standard draft is set so that the reflectance at the wavelength of the reproducing laser beam is 70% or more. , The first reflective layer 103 and the second reflective layer 1
06 is about 9 at the wavelength of the reproduction laser beam 109.
Aluminum (Al) having a reflectance of 0% is mainly used.

However, the first reflective layer 103 and the second reflective layer 103
When Al is used for the reflective layer 106, the visible image pattern 11
When the transmittance in the wavelength region of the reproduction laser beam 109 of 0 is not less than 88%, the reflectance on the visible image pattern 110 satisfies the reflectance of 70% or more which is the value defined by the DVD standard plan. I can't.

Therefore, in the second embodiment of the laminated optical information recording medium according to the present invention, the reflectance of the DVD in the wavelength region of the reproduction laser beam 109 is used as the material of the first reflective layer 103 and the second reflective layer 106. Is about 95%, the margin of the transmittance characteristic of the dye added to the ink used for printing the visible image pattern 110 is expanded.

Therefore, in the laminated optical information recording medium having one information layer on one side, the first reflective layer 10
By using Au for the third and second reflective layers 106, the margin of selection such as the type of dye that can be used as a raw material for the ink, the film thickness, and the density is widened, and the wavelength of the reproduction laser beam 109 of the visible image pattern 110 is increased. When the transmittance in the region is 85% or more, the margin can be expanded.

FIG. 3 shows a third embodiment of the bonded optical information recording medium according to the present invention, and in particular, a bonded optical information recording produced by bonding two discs each having two information surfaces on one side. It is a block diagram of a medium.

The first transparent substrate 301 has a first information surface 302 on which information is recorded so as to be optically reproducible. First
A pit called a pit is formed on the information surface 302, and is recorded spirally from the center of the disc. Then, the first semi-reflective layer 303 that reflects a part of the reproduction laser beam 315 and transmits the rest thereof is processed by the first information surface 302.
Is covered.

On the first semi-reflective layer 303, there is provided a first information surface 305 on which information is recorded so that the information can be reproduced optically.
A transparent resin layer 304 is formed. Second information side 305
Similarly to the first information surface 302, a depression called a pit is formed and spiral recording is performed from the center of the disc. Then, the second information surface is covered with the first reflective layer 306 that reflects the reproduction laser beam 315.
In addition, the surface of the first reflective layer 306 may be covered with a protective layer in order to protect the pits and the like from dust and external impact during manufacturing.

Next, the second transparent substrate 307 also has a third information surface 308 on which information can be optically reproduced. A pit called a pit is also formed on the third information surface 308, and spiral recording is performed from the center of the disc. The third information surface 308 is covered with the second semi-reflective layer 309 that reflects a part of the reproduction laser beam 315 and transmits the rest.

On the second semi-reflective layer 309, the second transparent resin layer 310 having the fourth information surface 311 on which the information is optically reproducibly recorded is also formed. Similarly to the third information surface 308, the fourth information surface 311 is formed with a depression called a pit, and is recorded spirally from the center of the disc. The fourth information surface is covered with the second reflective layer 312 that reflects the reproduction laser beam 315. Further, at the time of manufacturing, the surface of the second reflective layer 312 may be covered with a protective layer in order to protect the pits and the like from dust and external impact.

An adhesive layer 313 made of an ultraviolet curable resin or the like is applied to the first reflective layer 3 (or protective layer) of one of the two discs formed as described above, and the other disc is coated with the adhesive layer 313. (2) The reflective layer 312 (or the protective layer) is laminated and adhered. Here, as the adhesive layer 313, in addition to the ultraviolet curable resin, a hot melt adhesive or another adhesive such as an acrylic resin or a urethane resin may be used.

The reproducing laser beam 315 emitted from the optical pickup 314 is transmitted through the first transparent substrate 301 to the first information surface 302 or the second information surface 305, or is transmitted through the second transparent substrate 307 to generate the third information. The surface 308 or the fourth information surface 311 is irradiated.

According to the invention of the configuration shown in FIG. 3, the first
On the surface of the transparent substrate 301 and / or the second transparent substrate 307, the contents of information recorded on the first information surface 302, the second information surface 305, the third information surface 308, and the fourth information surface 311 and the related information The visible image pattern 316 of the matter is
The first transparent substrate 301, the first transparent resin layer 304, the second transparent substrate 307, and the second transparent resin layer 310 are made of ink having different transmission spectra in the visible light region.

The material used for the ink forming the visible image pattern 316 is the same as that used in the first embodiment,
An ultraviolet curable resin which is dyed with a dye or the like in advance is used.
The method of forming the visible image pattern 316 may be the same as the method used in the first embodiment.

As described in the first embodiment, the visible image pattern 316 has a transmissivity of 85% or more in the wavelength region of the reproducing laser beam 315. Laser beam 315 (wavelength 6
50 nm / 635 nm) is sufficiently transmitted. Therefore, the information recorded on the first information surface 302, the second information surface 305, the third information surface 308, and the fourth information surface 311 can be reproduced, and since it has absorption in the visible light region, it can be visually recognized. Thus, the visible light pattern 316 can be confirmed.

Further, in the optical information recording medium having the structure shown in FIG. 3, even if the number of information surfaces on one side is increased to three layers or more, the third embodiment can be implemented.

Further, the first information surface 302 and the second information surface 3
05, a guide groove is formed on the third information surface 308 and the fourth information surface 311 instead of the pits, and the first semi-reflective layer 303, the second
Semi-reflective layer 309, first reflective layer 306 and second reflective layer 31
The third embodiment is also carried out by forming a rewritable or write-once type information recording medium by forming a rewritable or write-once type recording layer such as a magneto-optical recording material, a phase change material, or a dye-based material in the second portion. be able to. Also in this case, the number of information surfaces on one side can be increased to three or more layers.

At present, in the DVD having a structure having two recording layers on one side as shown in FIG. 3, the reflectance at the wavelength of the reproducing laser beam is 25 to 25 at the time of reproducing.
It is stipulated in the draft standard so that the range is 40%.

Therefore, the first semi-reflective layer 303 and the second semi-reflective layer 303
As a material of the semi-reflective layer 309, a dielectric material such as aluminum nitride formed so as to have a reflectance of about 30% and a transmittance of about 70% is used.

Aluminum (Al) having a reflectance of about 90% at the wavelength of the reproducing laser beam 315 is mainly used for the first reflecting layer 306 and the second reflecting layer 312, and the first semi-reflecting layer is used. Layer 303 or second semi-reflective layer 3
When the light is transmitted through 12 for reproduction, it is designed so that the reproduction can be performed with the reflection intensity in the range of 25-40%.

However, the first reflective layer 306 and the second reflective layer 306
When Al is used for the reflective layer 312, the visible image pattern 31
If the transmittance in the wavelength region of the reproduction laser beam 315 of No. 6 does not increase to a certain degree, the reproduction reflection intensity on the visible image pattern 316 is at the lowest level in the reflectance range which is the value defined by the DVD standard proposal. It cannot meet a certain 25% or more.

Therefore, in the fourth embodiment of the optical information recording medium according to the present invention, the first reflective layer 306 and the second reflective layer 31 are used.
By using gold (Au) having a reflectance of about 95% in the wavelength region of the reproduction laser beam 315 of DVD as the material of No. 2, the transmittance characteristics of the dye added to the ink used for printing the visible image pattern 316. The margin of has been expanded.

Therefore, in the laminated optical information recording medium having two information layers on one side, the first reflecting layer 30
6 and the use of Au for the second reflective layer 312 expands the margin of selection such as the type, thickness, and concentration of the dye that can be used as the ink raw material, and the wavelength of the reproduction laser beam 315 of the visible image pattern 316. The margin of transmittance in the region can be expanded.

FIG. 4 shows a block diagram of an optical information recording medium which is a fifth embodiment of the present invention. In the present embodiment, the visible image pattern 402 is the same as in the first to fourth embodiments.
A transparent protective layer 403 made of an ultraviolet curable resin or the like was provided so as to cover the printed transparent substrate 401 with a smooth surface.

By providing the transparent protective layer 403, the visible image pattern 402 and the transparent substrate 401 can be protected from scratches and the like generated during handling. In addition, it is possible to reduce the aberration on the information surface due to the thickness of the visible image pattern 402, and it is possible to obtain a high quality reproduction signal.

This is designed so that the focal length of the objective lens for the optical disc corrects aberrations caused by the thickness and refractive index of the transparent substrate of the optical disc used. For example, in the case of DVD, the thickness of the transparent substrate is 0.6 m.
Since m and the refractive index are specified to be 1.55, the objective lens for DVD is designed so that a minute spot of almost diffraction limit can be obtained on the information surface through this substrate.

Therefore, if a visible image pattern 402 having a certain thickness (several tens to several hundreds of μm) is formed on the transparent substrate 401, when the reproducing laser beam is positioned on the visible image pattern 402, it is visible. Aberration is generated by the thickness and refractive index of the image pattern 402, the beam spot diameter on the information surface of this portion is increased, and there is a fear that the reproduction signal is deteriorated.

However, as described above, the visible image pattern 4
If the transparent protective layer 403 is provided so as to cover the transparent substrate 401 on which 02 is printed so as to have a smooth surface, the aberration due to the thickness of the visible image pattern 402 can be corrected and the deterioration of the signal of the reproduction signal can be prevented. Can be suppressed.

The printing of the visible image pattern of the present invention is
It can be applied not only to the bonded optical information recording medium shown in the first to fifth embodiments but also to a single-plate optical information recording medium such as a CD.

In the conventional single-plate type optical information recording medium, the print display is performed only on the side opposite to the light beam incident surface, but according to the present invention, the print display can be performed on both sides. For example, if a title or the like is printed on a light incident surface of a CD, the contents of the CD can be immediately grasped even when the light beam incident surface is placed on a desk or a turntable of a reproducing apparatus. And can also serve as a protective layer for protecting the light beam incident surface.

Further, it is expected that the density of the optical information recording medium will be increased in the future and the thickness of the transparent substrate will be thinned even in the single-plate type optical information recording medium. In this case, printing is performed on only one side. If applied, warpage may occur. However, according to the present invention, since printing can be performed on both surfaces, tension is evenly applied to the transparent substrate, and the occurrence of warpage can also be prevented.

[0061]

According to the optical information recording medium of the present invention, it is possible to perform label printing for displaying recorded contents over a sufficiently large area on a light beam incident surface without deteriorating reproduction characteristics. Can be.

[Brief description of drawings]

FIG. 1 is a first embodiment of a sticking type optical information recording medium according to the present invention, and in particular, a structure of a sticking type optical information recording medium produced by sticking two discs each having one information surface on one side. Fig.

FIG. 2 is a characteristic diagram of the spectral transmittance of an anthraquinone dye.

FIG. 3 is a third embodiment of the bonded optical information recording medium according to the present invention, and particularly, the structure of the bonded optical information recording medium manufactured by bonding two discs each having two information surfaces on one side. Fig.

FIG. 4 is a configuration diagram of a single-sided disc of an optical information recording medium according to a fifth embodiment of the present invention.

FIG. 5 is a configuration diagram of a cross-sectional structure of a conventional DVD.

[Explanation of symbols]

 101 First Transparent Substrate 102 First Information Surface 103 First Reflective Layer 104 Second Transparent Substrate 105 Second Information Surface 106 Second Reflective Layer 107 Adhesive Layer 108 Optical Pickup 109 Reproduced Laser Beam 110 Visible Image Pattern 301 First Transparent Substrate 302 first information surface 303 first semi-reflective film 304 first transparent resin layer 305 second information surface 306 first reflective layer 307 second transparent substrate 308 third information surface 309 second semi-reflective layer 310 second transparent resin layer 311 Fourth information surface 312 Second reflective layer 313 Adhesive layer 314 Optical pickup 315 Reproducing laser beam 316 Visible image pattern 401 Transparent substrate 402 Visible image pattern 403 Transparent protective layer 501 First transparent substrate 502 Information surface 503 Reflective layer 504 Adhesive layer 505 Second transparent substrate

Claims (11)

[Claims] 1. An optical information recording medium in which information can be optically reproduced by a transparent substrate and a light beam having at least one information surface, wherein the transparent substrate has a surface on which the light beam is incident. An optical information recording medium comprising a display of contents of information recorded on the transparent substrate and matters related to the information, which is made of an ink which transmits a light beam and has an absorption band in a visible region. 2. A transparent substrate on which information is optically reproducibly recorded by transmitting a light beam, and a light beam formed on a surface of the transparent substrate on which information is optically reproducibly recorded. And a reflective layer that reflects, made of ink having an absorption band in the visible region that transmits the light beam on the surface of the transparent substrate on which the light beam is incident, of the information recorded on the transparent substrate. An optical information recording medium having a display of contents and matters related thereto. 3. A transparent substrate on which information is optically reproducibly recorded by transmitting a light beam, and a light beam of a light beam formed on a surface of the transparent substrate on which information is optically reproducibly recorded. A semi-reflective layer that partially reflects and transmits the rest, and information is optically reproducibly recorded on a surface of the semi-reflective layer that is formed on the semi-reflective layer and that transmits a light beam and that is opposite to the first semi-reflective layer. A transparent resin layer and a reflective layer that is formed on the surface of the transparent resin layer on which information is recorded so as to be optically reproducible and reflects a light beam, and the light beam of the transparent substrate is incident on the transparent resin layer. Optical information, characterized in that it is provided with an indication of the content of information recorded on the transparent substrate and a matter related thereto, which is made of an ink which transmits a light beam on the side surface and has an absorption band in the visible region. recoding media. 4. The optical information recording medium according to claim 2 or 3, wherein the reflective layer is Au (gold). 5. A first transparent substrate on which information is optically reproducibly recorded by transmitting a light beam, and a surface of the first transparent substrate on which information is optically reproducibly recorded. A first reflective layer formed on the substrate and reflecting a light beam; a second transparent substrate that transmits the light beam and has information recorded thereon in an optically reproducible manner; and information on the second transparent substrate that is optically recorded. A second reflective layer formed on a surface that is reproducibly recorded on the optical disc and reflecting an optical beam; and an adhesive layer, wherein the first reflective layer and the second reflective layer are the adhesive layers. Made of an ink having an absorption band in the visible light region that transmits the light beam on the surface of the first transparent substrate and / or the second transparent substrate on the side where the light beam is incident, The first
2. An optical information recording medium comprising: the transparent substrate and the content of information recorded on the second transparent substrate and a display of matters related thereto. 6. A first transparent substrate that transmits a light beam and has information recorded thereon in an optically reproducible manner, and on a surface of the first transparent substrate on which information has been recorded in an optically reproducible manner. A first semi-reflective layer formed on the first semi-reflective layer for reflecting a part of the light beam and transmitting the remainder; and a first semi-reflective layer formed on the first semi-reflective layer for transmitting the light beam and opposite the first semi-reflective layer. A first transparent resin layer on which information is optically reproducibly recorded on a surface; and a light beam formed on the surface of the first transparent resin layer on which information is optically reproducible. A first reflective layer that reflects light, a second transparent substrate that transmits a light beam and on which information is recorded optically reproducible, and information on the second transparent substrate is recorded optically reproducible A second semi-reflective layer formed on a surface that reflects a part of the light beam and transmits the rest, and the second semi-reflection A second transparent resin layer which is formed on the second transparent resin layer and which transmits a light beam and has information recorded optically reproducibly on a surface opposite to the second semi-reflective layer; A second reflective layer formed on a surface on which information is optically reproducibly recorded and reflecting a light beam; and an adhesive layer, the first reflective layer and the second reflective layer An ink having an absorption band in the visible light region that transmits the light beam on the surface of the first transparent substrate and / or the second transparent substrate on which the light beam is incident, Made by said first
Of the transparent substrate, the first transparent resin layer, the second transparent substrate and the second transparent resin layer, and the visible image pattern of the contents of information recorded therein and matters related thereto. Optical recording medium. 7. The optical information recording medium according to claim 4 or 5, wherein the first reflective layer and / or the second reflective layer are provided.
The optical information recording medium, wherein the reflective layer of is Au (gold). 8. A transparent substrate which transmits a light beam, and at least one recording layer which is formed on the transparent substrate and is capable of recording, reproducing or erasing information by the light beam. It is provided with a display of the content of information recorded on the transparent substrate and a matter related thereto, which is made of an ink which transmits a light beam and has an absorption band in the visible region on a surface on which the beam is incident. Optical recording medium. 9. A first transparent substrate that transmits a light beam, and at least one or more first recording layer formed on the first transparent substrate and capable of recording, reproducing or erasing information by the light beam. A second transparent substrate that transmits a light beam, and at least one second recording layer formed on the second transparent substrate and capable of recording, reproducing and / or erasing information by the light beam, A layer, the first transparent substrate and the second transparent substrate are bonded together via the adhesive layer such that the first recording layer and the second recording layer are located inside, The first transparent substrate and / or the second transparent substrate is made of an ink that transmits a light beam on a surface on a side where the light beam is incident and has an absorption band in a visible light region.
Of the transparent substrate, the first transparent resin layer, the second transparent substrate and the second transparent resin layer, and the visible image pattern of the contents of information recorded therein and matters related thereto. Optical recording medium. 10. The optical information recording medium according to any one of claims 1 to 9, wherein the ink is a UV-curable resin.
The transmittance at a wavelength of ˜570 nm is 10% or less, 62
An optical information recording medium comprising a dye having a wavelength characteristic of 80% or more in transmittance at a wavelength of 0 to 850 nm. 11. The optical information recording medium according to claim 1, further comprising a smooth transparent protective layer on the surface having the visible image pattern.