JPH10143924A - Optical information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable label printing for displaying recording contents over a sufficiently large area without the deterioration of a reproduction characteristic on a light beam incident surface by using an optical information recording medium which displays the contents of the information recorded on a transparent substrate and the items associated therewith on the surface on the side where the light beam of the transparent substrate is made incident by the ink contg. a light absorptive discoloring material. SOLUTION: This optical information recording medium is manufactured by sticking two sheets of disks having information surfaces by one layer each on one surface and the first transparent substrate 101 has the first information surface 102 optically reproducibly recorded with the information. The second transparent substrate 104 has similarly the second information surface 105. The patterns 110, such as contents of the information recorded on the surfaces are formed of the ink contg. the light absorptive discoloring material which is discolored in its color according to the change in a received light quantity on the first and/or second information surface 102/105.

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.
As a bonding type optical information recording medium, a laser disk (hereinafter, referred to as LD: Laser Disc) is widely used. 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 affixing a label paper of 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, there is a DVD (Digital Versatile Disk) whose recording density is increased about 6 to 8 times that of a CD. FIG.
FIG. 9 is a schematic diagram of a cross-sectional structure of a conventional DVD. As shown in FIG. 4, the DVD has an information surface 402 and a diameter of 120 m.
m, a first transparent substrate 401 having a thickness of 0.6 mm, and an information surface 4
No. 02 having a diameter of 120 mm and a thickness of 0.6 mm
The structure is such that the transparent substrate 405 is bonded to the transparent substrate 405 with the adhesive layer 404 such that the information surface 402 is inside.

Here, the surface of the information surface 402 is covered with a reflection layer 403 made of a metal such as aluminum (Al) that reflects most of the laser light. 1 through the transparent substrate 401. Although not shown, the DVD includes a second transparent substrate 4.
05 is a double-sided reproduction type having a second information surface covered with a second reflective layer, and a multilayer type in which the first transparent substrate 401 and the second transparent substrate 405 each have two information surfaces. Proposed.

[0006]

SUMMARY OF THE INVENTION However, DVD
Has a diameter of 120 mm, a center hole diameter of 15 mm, and a diameter of about 46 mm at which the recording area starts, similarly to a compact disk (CD: Compact Disk). There is no surface for printing a label like a single-sided playback type optical disc, and the method of sticking label paper to the center of the disc like an LD cannot secure a sufficient area to display recorded contents. was there.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention comprises a transparent substrate, at least one information surface, and optically reproduces information by a light beam. In a possible optical information recording medium, the contents of information recorded on the transparent substrate made of ink containing an absorptive discoloration substance on the surface of the transparent substrate on which the light beam is incident and the indication of matters related thereto It is characterized by having.

[0008] The invention described in claim 2 of the present invention provides:
In a optical information recording medium, a transparent substrate through which a light beam is transmitted and information is recorded in an optically reproducible manner, and a light beam formed on a surface of the transparent substrate on which information is recorded in an optically reproducible manner. A reflective layer that reflects light, the content of information recorded on the transparent substrate made of ink containing an absorptive color-changing substance on the surface of the transparent substrate on which the light beam is incident and matters related thereto. It is characterized by having a display.

According to a third aspect of the present invention, there is provided a transparent substrate on which information is optically reproducibly recorded by transmitting a light beam in an optical information recording medium, and wherein the information on the transparent substrate is optically reproduced. A semi-reflective layer formed on the surface on which data is reproducibly recorded and reflecting a part of the light beam and transmitting the remainder; and the first semi-reflective layer formed on the semi-reflective layer and transmitting the light beam. A transparent resin layer on which information is optically reproducibly recorded on the opposite surface, and a reflection formed on the surface on which the information of the transparent resin layer is optically reproducible and reflecting a light beam; And a display of the content of information recorded on the transparent substrate made of ink containing an absorptive discoloration substance on the surface of the transparent substrate on which the light beam is incident and information related thereto. It is characterized by the following.

The fourth aspect of the present invention is the second aspect of the present invention.
4. The optical information recording medium according to claim 3, wherein the reflection layer is made of Au (gold).

According to a fifth aspect of the present invention, there is provided an optical information recording medium, comprising: a first transparent substrate on which a light beam is transmitted and information is recorded so as to be optically reproducible; A first reflective layer formed on a surface of the transparent substrate on which information is optically reproducibly recorded and reflecting a light beam; and a first reflective layer transmitting the light beam and recording the information optically reproducible. 2
A transparent substrate, a second reflective layer formed on a surface of the second transparent substrate on which information is optically reproducibly recorded and reflecting a light beam, and an adhesive layer, And the second reflective layer are bonded together via the adhesive layer, and the first transparent substrate and / or the second transparent substrate has a light-absorptive and color-changing substance on a surface of the light-incident side of the first transparent substrate and / or the second transparent substrate. And a display of the contents of information recorded on the first transparent substrate and the second transparent substrate made of the ink containing and information related thereto.

According to a sixth aspect of the present invention, there is provided an optical information recording medium, comprising: a first transparent substrate which transmits a light beam and on which information is optically reproducibly recorded; A first semi-reflective layer formed on a surface of the transparent substrate on which information is optically reproducibly recorded and reflecting a part of the light beam and transmitting the rest; and a first semi-reflective layer formed on the first semi-reflective layer A first transparent resin layer that transmits a light beam and has information recorded optically reproducibly on a surface opposite to the first semi-reflective layer; and information on the first transparent resin layer is optically A first reflective layer formed on a surface on which information is recorded so as to be able to be read in a reproducible manner, a second transparent substrate which transmits the light beam and has information recorded in an optically reproducible manner, Reflects a part of the light beam formed on the surface of the second transparent substrate on which information is recorded optically reproducibly. A second semi-reflective layer which transmits the remainder,
A second transparent resin layer that is formed on the second semi-reflective layer, transmits a light beam, and has information recorded optically reproducibly on a surface opposite to the second semi-reflective layer; A second reflection layer formed on a surface of the second transparent resin layer on which information is optically reproducibly recorded and reflecting a light beam; and an adhesive layer. A second reflective layer is bonded via the adhesive layer, and the first transparent substrate and / or the second transparent substrate is coated with an ink containing an absorptive color-changing substance on a surface of the side on which a light beam is incident. The display of the contents of the information recorded on the first transparent substrate, the first transparent resin layer, the second transparent substrate, and the second transparent resin layer and the related matters. It is characterized by the following.

The present invention according to claim 7 of the present invention is directed to claim 5
7. The optical information recording medium according to claim 6, wherein said reflection layer is made of Au (gold).

According to an eighth aspect of the present invention, there is provided an optical information recording medium, comprising: a transparent substrate transmitting a light beam; and recording, reproducing and / or erasing of information by the light beam formed on the transparent substrate. Comprising at least one or more recording layers capable of, and the content of information recorded on the transparent substrate made of ink containing an absorptive discoloration substance on the surface of the transparent substrate on the side where the light beam is incident, and it It is characterized by having a display of related items.

The ninth aspect of the present invention is the first aspect of the present invention.
9. An optical information recording medium according to claim 8, further comprising a smooth transparent protective layer on the surface having the display.

According to the first to ninth aspects of the present invention, a light beam for reproducing information recorded on an optical information recording medium or recording information on an optical information recording medium is provided. The characters and the like are printed and displayed on the surface of the transparent substrate on the side where light is incident by using an ink containing an absorptive discoloration substance. Therefore, in places where light is present, such as outdoors or indoors, the printed display is visually recognizable, and in places where light is blocked such as inside a recording / reproducing apparatus, the printed display becomes transparent, and recording / reproducing is performed. The recording and reproducing of information can be performed by transmitting a light beam for use.

According to the fourth and seventh aspects of the present invention, Au (gold) having a high reflectivity at the wavelength of the reproduction laser beam is used as the material of the reflection layer. The margin of the transmittance characteristic of the light-absorptive color changing substance to be added can be expanded.

According to the ninth aspect of the present invention, since a smooth transparent protective layer is provided on the surface of the transparent substrate having the printed display, aberration due to the thickness of the printed display is corrected, and reproduction is performed. Signal degradation can be suppressed.

[0019]

FIG. 1 is a schematic view of an optical information recording medium according to the present invention. The configuration shown in FIG.
In particular, the present invention is a laminated optical information recording medium produced by laminating two disks each having an information surface one layer at a time on one side.

The first transparent substrate 101 has a first information surface 102 on which information is recorded in an optically reproducible manner. First
A depression called a pit is formed on the information surface 102, and the information surface 102 is recorded spirally or concentrically from the center of the disk. Then, the first information surface 102 is covered with the first reflection layer 103 that reflects the reproduction laser beam 109. Further, at the time of manufacturing, the surface of the first reflection layer 103 may be covered with a protective layer in order to protect the pits and the like from dust and external impact.

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 optically reproduced. Depressions called pits are also formed on the second information surface 105, and are recorded in a spiral or concentric shape from the center of the disk. Then, the second information surface 105 is reflected by the second reflection layer 106 that reflects the reproduction laser beam 109.
Is covered. 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 on the first reflective layer 103 (or the protective layer) of one of the two disks formed as described above, and the other disk is coated with an adhesive. The second reflective layer 106 (or the protective layer) is bonded to face. Here, the adhesive layer 107
Alternatively, other than the ultraviolet curable resin, a hot melt adhesive or another adhesive such as an acrylic resin or a urethane resin may be used.

The reproduction laser beam 109 emitted from the optical pickup 108 is transmitted through the first transparent substrate 101 to the first information surface 102 or transmitted through the second transparent substrate 104 to be irradiated on the second information surface 105, respectively. You. 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 having the configuration shown in FIG.
On the surface of the transparent substrate 101 and / or the second transparent substrate 104, the pattern 110 of the content of the information recorded on the first transparent substrate 101 and the second transparent substrate 104 and matters related thereto changes according to the change in the amount of received light. The color is changed by an ink containing a light-absorptive color-changing substance (color is formed when the amount of received light is large, and is erased when the amount of received light is small).

The ink for forming the pattern 110 is obtained by incorporating a light absorbing and discoloring substance in an ink binder such as an ultraviolet curable resin, and the color density is set according to the ratio of the ink binder to the light absorbing and discoloring substance and the printed film thickness. be able to.

Examples of the absorption-discoloring substance include spiropyran compounds, dihydroindolizine compounds, fulgide compounds, piologen compounds, dihydripylene compounds, thioindigo compounds, anthracenophane derivatives, tetrobenzoperopyrene derivatives, and diphenylthiocarbazone metal. A photochromic material such as a compound can be used. Since the colors are different depending on the respective materials, when forming the multicolor pattern 110, multicolor printing is performed using a plurality of different materials.

[0027] These light absorbing and discoloring substances of any color are added to a monomer such as an ultraviolet curable resin to prepare a printing ink, and the first transparent substrate is formed by a method such as screen printing, roll printing or gravure printing. On the surface of 101 and / or the second transparent substrate 104, a pattern 110 of the content of information recorded on the first information surface 102 and the second information surface 105 and matters related thereto (eg, title, sales company name, etc.) Print. Immediately after printing, ultraviolet light is irradiated to cure the ultraviolet curable resin, and the printed pattern 110 is dried and fixed.

As described above, since the pattern 110 is formed by the ink containing the light absorbing and discoloring substance, the light receiving amount of the light absorbing and discoloring substance increases in places where light exists, such as outdoors or indoors, and the pattern 110 Can be visually recognized. On the other hand, in a place where light is blocked, such as inside the recording / reproducing apparatus, the amount of the light-absorptive and discoloring substance is reduced, so that the pattern 110 becomes transparent.

When the optical information recording medium of the present invention is set on a turntable inside the recording / reproducing apparatus, the reproducing laser beam 109 transmitted through the pattern 110 is applied to the first transparent substrate 10.
Through the first or second transparent substrate 104 and the first reflective layer 10
The light is reflected by the third or second reflective layer 106. The reflected reproduction laser beam 109 is again transmitted to the first transparent substrate 1.
01 or the second transparent substrate 104 and the pattern 110, and the information recorded on the first information surface 102 or the second information surface 105 can be reproduced.

When the optical information recording medium of the present invention is taken out of the recording / reproducing apparatus, the amount of the light-absorbing and discoloring substance in the pattern 110 increases again, and the 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 recording layer made of a magneto-optical recording material, a phase change material, a dye-based material, or the like is formed on the third and second reflective layers 106 to form a rewritable or write-once optical information recording medium.
The first embodiment can be implemented.

An optical information recording medium having a structure having one recording layer on one side as shown in FIG. 1 is set so that the reflectance at the wavelength of the reproduction laser beam 109 is 70% or more, similarly to a CD. It is desired to be done. Generally, the first
Like the CD, the reflective layer 103 and the second reflective layer 106 are mainly made of aluminum (Al) having a reflectivity of about 90% at the wavelength of the reproducing laser beam 109.

However, the first reflective layer 103 and the second
When Al is used for the reflective layer 106, if the transmittance of the pattern 110 in the wavelength region of the reproducing laser beam 109 does not become 88% or more in the recording / reproducing apparatus, the pattern 1
The reflectance on 10 cannot satisfy 70% or more.

Therefore, in the second embodiment of the bonded optical information recording medium according to the present invention, as the material of the first reflective layer 103 and the second reflective layer 106, the reflectance in the wavelength range of the DVD reproduction laser beam 109 is used. Is about 95%, the margin of the transmittance characteristic of the light-absorptive color changing substance added to the ink used for printing the pattern 110 can be expanded.

Therefore, in the bonded 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 selection margin of the type, thickness, concentration, etc. of the light absorbing and discoloring substance that can be used as the ink material is widened, and the wavelength range of the reproduction laser beam 109 of the pattern 110 is increased. , The margin can be expanded to 85% or more. Further, after the optical information recording medium of the present invention is installed in the recording / reproducing apparatus, the color erasing time until the pattern 110 reaches a reproducible transmittance can be reduced.

FIG. 2 is a schematic view of an optical information recording medium according to the present invention. The configuration shown in FIG. 2 is a third embodiment of the present invention, and in particular, a disc 2 having an information surface with two layers on one side.
This is a laminated optical information recording medium manufactured by laminating sheets.

The first transparent substrate 201 has a first information surface 202 on which information is recorded optically reproducibly. First
A depression called a pit is formed on the information surface 202, and is recorded in a spiral form from the center of the disk. Then, the first information surface 202 is reflected by the first semi-reflective layer 203 which reflects a part of the reproduction laser beam 215 and transmits the rest.
Is covered.

On the first semi-reflective layer 203, a first information surface 205 having a second information surface 205 on which information is optically reproduced is recorded.
A transparent resin layer 204 is formed. Second information surface 205
Similarly to the first information surface 202, a depression called a pit is formed and recorded in a spiral or concentric shape. Then, the second information surface is covered with the first reflection layer 206 that reflects the reproduction laser beam 215. Further, at the time of manufacturing, the surface of the first reflection layer 206 may be covered with a protective layer in order to protect the pits and the like from dust and external impact.

Next, the second transparent substrate 207 also has a third information surface 208 on which information is optically reproduced. Depressions called pits are also formed on the third information surface 208, and are recorded spirally from the center of the disk. The third information surface 208 is covered with a second semi-reflective layer 209 that reflects part of the reproduction laser beam 215 and transmits the rest.

A second transparent resin layer 210 having a fourth information surface 211 on which information is optically reproducibly recorded is also formed on the second semi-reflective layer 209. Similarly to the third information surface 208, the fourth information surface 211 has a depression called a pit, and is recorded in a spiral form from the center of the disk. The fourth information surface is covered by the second reflection layer 212 that reflects the reproduction laser beam 215. Further, at the time of manufacturing, the surface of the second reflective layer 212 may be covered with a protective layer in order to protect the pits and the like from dust and external impact.

An adhesive layer 213 made of an ultraviolet curable resin or the like is applied on the first reflective layer 206 (or the protective layer) of one of the two disks formed as described above, and the other disk is coated with an adhesive. It is bonded facing the second reflective layer 212 (or the protective layer). Here, the adhesive layer 213
Alternatively, other than the ultraviolet curable resin, a hot melt adhesive or another adhesive such as an acrylic resin or a urethane resin may be used.

The reproduction laser beam 215 emitted from the optical pickup 214 transmits through the first transparent substrate 201 to the first information surface 202 or the second information surface 205, or transmits through the second transparent substrate 207 to transmit the third information. The light is irradiated onto the surface 208 or the fourth information surface 211, respectively.

According to the invention having the structure shown in FIG.
On the surface of the transparent substrate 201 and / or the second transparent substrate 207, the contents of information recorded on the first information surface 202, the second information surface 205, the third information surface 208, and the fourth information surface 211 and the information related thereto The matter pattern 216 is made of an ink containing a light absorbing and discoloring substance.

The material used for the ink forming the pattern 216 is the same as that used in the first embodiment, in which a light absorbing and discoloring substance is contained in an ink binder such as an ultraviolet curable resin. The method of forming the pattern 216 may be the same as the method used in the first embodiment.

As described in the first embodiment, since the pattern 216 is formed by the ink containing the light absorbing and discoloring substance, the pattern 216 may be used in places where light exists, such as outdoors or indoors.
Since the amount of light received by the light-absorbing discoloration substance increases, the pattern 216
Can be visually recognized. On the other hand, in a place where light is blocked, such as inside a recording / reproducing device,
Since the amount of light received by the light-absorptive discoloring substance is reduced, the pattern 216
Becomes transparent.

Therefore, when the optical information recording medium of the present invention is installed on the turntable inside the recording / reproducing apparatus, the reproducing laser beam 215 that has passed through the pattern 216 emits the first laser beam.
The light passes through the transparent substrate 201 or the second transparent substrate 207 and is reflected by the first semi-reflective layer 203, the first reflective layer 206 or the second semi-reflective layer 209, and the second reflective layer 212. The reflected reproduction laser beam 215 passes through the first transparent substrate 201 or the second transparent substrate 207 and the pattern 216 again, and the first information surface 202, the second information surface 205, the third information surface 208, and the fourth information Information recorded on the surface 211 can be reproduced.

When the optical information recording medium of the present invention is taken out of the recording / reproducing apparatus, the amount of the light-absorbing and discoloring substance in the pattern 216 increases again, and the pattern 216 can be confirmed visually.

Further, in the optical information recording medium having the structure shown in FIG. 2, the third embodiment can be implemented even if the number of information surfaces on one side is increased to three or more layers.

Further, the first information surface 202 and the second information surface 2
05, guide grooves are formed on the third information surface 208 and the fourth information surface 211 instead of the pits, and the first semi-reflective layer 203 and the second
Semi-reflective layer 209, first reflective layer 206, and second reflective layer 21
The second embodiment is also implemented by forming a rewritable or write-once type recording layer such as a magneto-optical recording material, a phase-change material, a dye-based material, and the like as a rewritable or write-once optical information recording medium. can do. Also in this case, the number of information surfaces on one side can be increased to three or more layers.

In an optical information recording medium having a structure having two recording layers on one side as shown in FIG. 2, the reflectance at the wavelength of the reproducing laser beam is 25% for each layer.
It is desirable to be in the range of ４０40%.

For this purpose, the first semi-reflective layer 203 and the second
As a material of the semi-reflective layer 209, a dielectric material such as aluminum nitride formed to have a reflectance of about 30% and a transmittance of about 70% is used.

For the first reflection layer 206 and the second reflection layer 212, aluminum (Al) exhibiting a reflectance of about 90% at the wavelength of the reproduction laser beam 215 is mainly used, and the first semi-reflection Layer 203 or second semi-reflective layer 2
In the case where the light is transmitted through 12 and reproduced, the light is designed to be reproduced with a reflection intensity in the range of 25 to 40%.

However, the first reflective layer 206 and the second
When Al is used for the reflection layer 212, the reproduction reflection intensity on the pattern 216 may fall within the above-mentioned reflectance range unless the transmittance of the pattern 216 in the wavelength region of the reproduction laser beam 215 becomes high enough. Can not.

Therefore, in the fourth embodiment of the optical information recording medium according to the present invention, the first reflection layer 206 and the second reflection layer 21 are provided.
By using gold (Au) having a reflectance of about 95% in the wavelength range of the DVD reproducing laser beam 215 as the material of the second material, the transmittance characteristics of the light absorbing and discoloring substance added to the ink used for printing the pattern 216 can be improved. Margin can be expanded.

Therefore, in the laminated optical information recording medium having two information layers on one side, the first reflection layer 20
The use of Au for the sixth and second reflective layers 212 widens the selection margin of the type, thickness, concentration, etc. of the light absorbing and discoloring substance that can be used as the ink material, and the wavelength range of the reproduction laser beam 215 of the pattern 216. , The margin of the transmittance can be enlarged.

FIG. 3 is a schematic view of the optical information recording medium of the present invention. The configuration shown in FIG. 3 is a fifth embodiment of the present invention. In this embodiment, as in the first to fourth embodiments, the transparent substrate 301 on which the pattern 302 is printed is covered. A transparent protective layer 303 made of an ultraviolet curable resin or the like was provided so as to have a smooth surface.

By providing the transparent protective layer 303, the pattern 302 and the transparent substrate 301 can be protected from scratches or the like generated during handling. Also, the pattern 302
Thus, aberrations on the information surface caused by the thickness can be reduced, and a high-quality reproduced signal can be obtained.

This is designed so that the focal length of the objective lens for the optical disk corrects the aberration generated by the thickness and the refractive index of the transparent substrate of the optical disk 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 the pattern 302 having a certain thickness (several tens to several hundreds of μm) is formed on the transparent substrate 301, when the reproduction laser beam is positioned on the pattern 302, the thickness and the refractive index of the pattern 302 However, there is a fear that the beam spot diameter on the information surface of this portion increases, and the reproduced signal deteriorates.

However, as described above, the transparent protective layer 303 covers the transparent substrate 301 on which the pattern 302 is printed.
Is provided so that the surface becomes smooth, the aberration due to the thickness of the pattern 302 can be corrected, and the deterioration of the reproduced signal can be suppressed.

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

In the conventional single-plate type optical information recording medium, print display is performed only on the side opposite to the light beam incident surface, but according to the present invention, 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.

In the future, it is expected that the density of the optical information recording medium will increase and the thickness of the transparent substrate will also decrease in the single-plate type optical information recording medium. In this case, printing is performed only on one side. When applied, there is a risk of warpage. 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.

[0064]

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 the drawings]

FIG. 1 is a schematic view of an optical information recording medium according to the present invention.

FIG. 2 is a schematic view of an optical information recording medium according to the present invention.

FIG. 3 is a schematic view of an optical information recording medium according to the present invention.

FIG. 4 is a schematic 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 reproduction laser beam 110 pattern 201 first transparent substrate 202 first Information surface 203 First semi-reflective film 204 First transparent resin layer 205 Second information surface 206 First reflective layer 207 Second transparent substrate 208 Third information surface 209 Second semi-reflective layer 210 Second transparent resin layer 211 Fourth information Surface 212 Second reflective layer 213 Adhesive layer 214 Optical pickup 215 Reproduced laser beam 216 Pattern 301 Transparent substrate 302 Pattern 303 Transparent protective layer 401 First transparent substrate 402 Information surface 403 Reflective layer 404 Adhesive layer 405 Second transparent substrate

Claims (9)

[Claims] 1. An optical information recording medium comprising: a transparent substrate; and at least one information surface, from which information can be optically reproduced by a light beam, on a surface of the transparent substrate on which the light beam is incident. An optical information recording medium characterized by comprising information of information recorded on the transparent substrate made of an ink containing an absorptive discoloration substance and information related thereto. 2. A transparent substrate which transmits a light beam and in which information is recorded optically reproducibly, and a light beam formed on a surface of the transparent substrate on which information is recorded optically reproducible. A reflective layer that reflects the light, and a display of the content of information recorded on the transparent substrate made of ink containing an absorptive color-changing substance on the surface of the transparent substrate on which the light beam is incident and matters related thereto An optical information recording medium comprising: 3. A transparent substrate that transmits a light beam and on which information is recorded optically reproducibly, and a light beam formed on a surface of the transparent substrate on which information is recorded optically reproducible. A semi-reflective layer that reflects part and transmits the rest, and information is optically reproducibly recorded on a surface formed on the semi-reflective layer and transmitting the light beam and opposite to the first semi-reflective layer. A transparent resin layer, and a reflective layer formed on a surface on which information of the transparent resin layer is optically reproducibly recorded and reflecting a light beam, and the light beam incident side of the transparent substrate An optical information recording medium characterized by comprising information recorded on the transparent substrate made of an ink containing an absorptive discoloration substance on the surface of the surface and a display of matters related thereto. 4. An optical information recording medium according to claim 2, wherein said reflection layer is made of Au (gold). 5. A first transparent substrate through which a light beam is transmitted and information is optically reproducibly recorded, and a surface of the first transparent substrate on which information is reproducibly recorded. A first reflective layer formed on the substrate and reflecting the light beam; a second transparent substrate transmitting the light beam and recording information optically reproducible; and information on the second transparent substrate being optically reflected. A second reflective layer formed on a surface that is reproducibly recorded on the surface and reflecting a light beam; and an adhesive layer, wherein the first reflective layer and the second reflective layer form the adhesive layer. The first transparent substrate and / or the second transparent substrate made of an ink containing an absorptive color-changing substance on the surface of the first transparent substrate and / or the second transparent substrate on the side where the light beam is incident. 2
An optical information recording medium, comprising: a display of the content of information recorded on a transparent substrate according to (1) and items 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 formed thereon and transmitting a light beam and having 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, wherein the first reflective layer and the second reflective layer are The first transparent substrate, which is bonded through the adhesive layer and is made of an ink containing an absorptive color changing substance on a surface of the first transparent substrate and / or the second transparent substrate on a side where a light beam is incident. An optical information recording apparatus comprising: a substrate, the first transparent resin layer, the second transparent substrate, and a display of information contents recorded on the second transparent resin layer and matters related thereto. Medium. 7. The optical information recording medium according to claim 5, wherein said reflection layer is made of Au (gold). 8. A transparent substrate that transmits a light beam, and at least one or more recording layers formed on the transparent substrate and capable of recording, reproducing, or erasing information with the light beam, An optical information recording medium characterized by comprising information of information recorded on the transparent substrate and display of matters related thereto, which is made of an ink containing an absorptive color-changing substance on a surface on which light is incident. 9. The optical information recording medium according to claim 1, further comprising a smooth transparent protective layer on the surface having the display.