WO2008029765A1 - Volume hologram optical recording medium, composition for forming volume hologram recording layer, volume hologram recording material, and volume hologram optical recording method - Google Patents
Volume hologram optical recording medium, composition for forming volume hologram recording layer, volume hologram recording material, and volume hologram optical recording method Download PDFInfo
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- WO2008029765A1 WO2008029765A1 PCT/JP2007/067139 JP2007067139W WO2008029765A1 WO 2008029765 A1 WO2008029765 A1 WO 2008029765A1 JP 2007067139 W JP2007067139 W JP 2007067139W WO 2008029765 A1 WO2008029765 A1 WO 2008029765A1
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- volume hologram
- recording layer
- resin matrix
- optical recording
- recording medium
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0065—Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24035—Recording layers
- G11B7/24044—Recording layers for storing optical interference patterns, e.g. holograms; for storing data in three dimensions [3D], e.g. volume storage
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
- G11B7/245—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing a polymeric component
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
- G03H1/024—Hologram nature or properties
- G03H1/0248—Volume holograms
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
- G03H2001/026—Recording materials or recording processes
- G03H2001/0264—Organic recording material
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/18—Particular processing of hologram record carriers, e.g. for obtaining blazed holograms
- G03H2001/186—Swelling or shrinking the holographic record or compensation thereof, e.g. for controlling the reconstructed wavelength
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2260/00—Recording materials or recording processes
- G03H2260/12—Photopolymer
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2260/00—Recording materials or recording processes
- G03H2260/30—Details of photosensitive recording material not otherwise provided for
- G03H2260/31—Ageing or resistance of the material
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2270/00—Substrate bearing the hologram
- G03H2270/53—Recording material dispersed into porous substrate
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
- G11B7/246—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes
- G11B7/247—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes methine or polymethine dyes
- G11B7/2472—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes methine or polymethine dyes cyanine
Definitions
- Volume hologram optical recording medium volume hologram recording layer forming composition, volume hologram recording material, and volume hologram optical recording method
- the present invention relates to a volume hologram optical recording medium and the like, and more particularly to a volume hologram optical recording medium and the like capable of three-dimensional information recording by irradiation with a plurality of coherent lights.
- Non-Patent Document 1 General principles relating to the production of holograms are described in several documents and technical books (see Non-Patent Document 1). According to these, one of the two light beams of coherent laser light is irradiated onto the recording object, and a photosensitive hologram recording material is placed at a position where the light can be received.
- the hologram recording material is directly irradiated with the other coherent light in addition to the light from the object without hitting the object.
- the light from the object is called object light
- the light directly irradiated on the recording material is called reference light.
- interference fringes between the reference beam and the object beam are recorded as image information.
- the hologram is diffracted by the hologram so as to reproduce the wavefront of the reflected light that first reaches the recording material from the object. Is done.
- the same object image as the real image of the object can be observed in three dimensions.
- the hologram formed by making the reference light and the object light incident on the hologram recording material from the same direction is called a transmission hologram! /
- the hologram formed by making the reference light and the object light incident from the opposite side! This is called a reflection hologram.
- a hologram having a sufficiently thick film thickness with respect to the interference fringe interval (usually a film thickness of about 5 times the interference fringe interval or about 1 ⁇ m or more) is called a volume hologram.
- Volume holograms can be recorded in the film thickness direction, so recording with higher density is possible with larger film thickness.
- a write-once type that does not require wet processing or bleaching.
- the composition is generally a resin matrix in which a photoactive compound is compatible.
- a photopolymer method in which a monomer that can be cationically polymerized by radical polymerization is combined with a resin matrix (see Patent Documents 1 to 4, etc.).
- the object light is irradiated onto the recording layer together with the reference light so that the object light and the reference light interfere with each other in the recording layer.
- the interference light changes the photoactive compound in the recording layer.
- the photoactive compound is a polymerizable monomer
- polymerization is initiated, and a concentration gradient of the photoactive compound is generated accordingly, and the photoactive compound diffuses and moves from a weak part to a strong part.
- a refractive index difference occurs in the recording layer due to the density of the photoactive compound in the recording layer, and the interference fringes recorded in the recording layer are recorded as a hologram. Since the diffraction efficiency increases as the refractive index difference in the recording layer increases, either the resin matrix or the photoactive compound has an aromatic ring, a hetero ring, chlorine, an odor, etc. in order to generate the refractive index difference.
- Non-Patent Document 1 Junpei Uchiuchi, “Holographic Display”, Chapter 2, Industrial Books
- Patent Document 1 Japanese Patent No. 3737306
- Patent Document 2 Patent No. 3645480
- Patent Document 3 JP 2005-43862 A
- Patent Document 4 Japanese Translation of Special Publication 2005 502918
- Various methods may be used as a method for forming the resin matrix.
- isocyanate-hydroxyl stage polymerization (urethane formation), isocyanate-amine amine polymerization (urea formation), cationic epoxy polymerization, cationic butyl ether polymerization, cationic alkenyl ether polymerization, epoxy-amine amine polymerization, epoxy mercaptan stage polymerization, etc.
- this resin matrix contains a polyether skeleton from the viewpoint of compatibility with the photoactive compound before photoreaction and compatibility with the polymer obtained from the photoactive compound after photoreaction. Synthetic resins are often used.
- Patent Document 1 in practice, a synthetic resin having a structure of an alkylene oxide having C1 to C3 carbon atoms is often used as a main component. Further, Patent Document 2 of this later application has a problem that this resin matrix tends to absorb moisture during storage, the material expands, the refractive index changes spatially non-uniformly, and the shelf life is limited. It is described that there is.
- Patent Document 2 describes a method of packaging a recording layer in a sealed glass plate and sealing the periphery with a moisture-proof sealant! There is no description.
- the recording characteristics of the information when stored on the medium (Shelf Life) and the storage stability of the recorded information (Archival Life) are particularly important issues. There are no specific details yet.
- an object of the present invention is to provide a volume hologram optical recording medium having a recording layer with low hygroscopicity.
- Another object of the present invention is to provide a composition for forming a volume hologram recording layer that has low hygroscopicity, excellent storage stability, and excellent compatibility with other components.
- Another object of the present invention is to provide a volume hologram recording material. Another object of the present invention is to provide a volume hologram optical recording method. Means for solving the problem
- the present inventors have excellent storage stability when the moisture absorption rate of the formed recording layer is 1.5% by weight or less, and other components. It has been found that a volume hologram optical recording medium excellent in compatibility with can be obtained.
- the glass transition temperature (Tg) is unlikely to decrease because the amount of moisture mixed into the matrix is small. Hard to happen. For this reason, the initial state in which the photoactive compound is uniformly dissolved and dispersed in the resin matrix is maintained, and even when the medium is stored for a long period of time, the sensitivity is high. It is thought that information can be recorded frequently.
- the movement of the photoactive compound is small after recording, it is considered that the storage stability of the recorded information is also improved. Further, when the moisture absorption rate is low, the recording layer itself is not easily expanded, so that a spatial refractive index change occurs, so that a uniform state is maintained and the optical quality is not impaired. In addition, the influence on the visible light polymerization initiator is reduced, and it is considered that recording is performed with high sensitivity.
- the recording layer contains the resin matrix (A) and / or the resin matrix (B) and the photoactive compound (C).
- the present inventors have found that this can be achieved by measures such as reducing the concentration of the hydrophilic functional group and the like, and adding an additive having a hydrophobic structure.
- the resin matrix (B) is obtained by reacting an epoxy compound (B1) having two or more epoxy groups in one molecule and a curing agent (B2).
- the recording layer has a multilayer structure including at least a transparent substrate and a recording layer containing a synthetic resin, and the recording layer is irradiated with a plurality of coherent lights.
- a volume hologram optical recording medium capable of recording information three-dimensionally by interference fringes formed therein, wherein the formed recording layer has a moisture absorption of 1.5% by weight or less.
- An optical recording medium is provided.
- the recording layer includes a resin matrix (A) and / or a resin matrix (B), and a photoactive compound (C).
- the resin matrix (B) is obtained by reacting an epoxy compound (B1) having two or more epoxy groups in one molecule with a curing agent (B2). Is preferred.
- the polyisocyanate (A1) has three or more isocyanate groups in one molecule.
- the epoxy compound (B1) has a carbon number of 4 or more and 10 or less. It is preferable to have the following alkylene oxide.
- the curing agent (B2) may be at least one selected from the group consisting of amines, acid anhydrides, phenols, anion polymerization initiators and cationic polymerization initiators. I like it.
- the photoactive compound (C) is preferably a radical polymerizable monomer.
- the ratio of the photoactive compound (C) is 100 parts by weight of the resin matrix (A) or the resin matrix (B) or the sum of the resin matrix (A) and the resin matrix (B) ((A) + (B)) It is preferably 0.5 parts by weight or more and 100 parts by weight or less with respect to 100 parts by weight.
- a composition for forming a volume hologram recording layer which is obtained by reacting a compound (B1) with a curing agent (B2).
- volume hologram recording material comprising at least the composition for forming a volume hologram recording layer according to claim 8.
- the recording layer of the volume hologram optical recording medium is irradiated with excitation light and reference light, and volume hologram recording is performed on the recording layer by interference between the excitation light and the reference light.
- a volume hologram optical recording method is provided.
- a volume holographic optical recording medium having a recording layer with low hygroscopicity and excellent storage stability can be obtained.
- a volume hologram optical recording medium to which the present embodiment is applied has a multilayer structure including at least a transparent substrate and a recording layer containing a synthetic resin. Moisture absorption is 1.5% by weight or less.
- the moisture absorption rate of the recording layer formed in the present embodiment is evaluated in the state of a thin film having a thickness of 500 ⁇ peeled from the substrate.
- the moisture absorption rate (%) is set immediately after the recording layer is prepared, that is, the weight of the recording layer before moisture absorption is W1 (23 ° C, 50% RH), and is placed in an environment of 60 ° C, 90% RH for 24 hours. Then, the weight of the recording layer measured immediately after that is W2, and is calculated by the following formula.
- (meth) acrylic acid is a generic term for acrylic acid and methacrylic acid.
- (meth) acrylamide is a generic term for acrylic acid and methacrylic acid.
- (meth) acrylamide is a generic term for acrylic acid and methacrylic acid.
- (meth) acrylamide is a generic term for acrylic acid and methacrylic acid.
- (meth) acrylamide is a generic term for acrylic acid and methacrylic acid.
- (meth) acrylamide is a generic term for acrylic acid and methacrylic acid.
- a 500 m-thick recording layer formed on the substrate using the composition is peeled off from the substrate, and moisture is contained in an environment of 60 ° C. and 90% RH. It has the property that the weight increase (moisture absorption rate) after being saturated is 1.5% by weight or less based on the initial weight.
- compositions for forming a volume hologram recording layer examples include those containing at least a resin matrix (A) and / or a resin matrix (B) (hereinafter sometimes simply referred to as “resin matrix”) and a photoactive compound (C).
- resin matrix a resin matrix
- C a photoactive compound
- hydrophilic functional groups include functional groups and structures such as urethane bonds, urea bonds, hydroxyl groups, amino groups, carboxyl groups, ethylene glycol residues, and propylene glycol residues.
- hydrophobic structures include C4 or higher cyclic or non-cyclic alkyl groups, hydrocarbon groups such as alkylene groups; structures containing fluorine atoms such as perfluoroalkyl structures and perfluoroalkylene structures; and Examples include a siloxane structure.
- a specific measure for reducing the hydrophilic functional group concentration in the matrix for example, a method of forming a matrix using a polyol or polyisocyanate having a relatively high molecular weight; There is a method of reducing the urethane bond concentration in the matrix as a result by reducing the number of functional groups per molecule contained in cyanate.
- the hydrophilic functional groups in the matrix can also be reduced by reducing residual hydroxyl groups, isocyanate groups, epoxy groups (or hydroxyl groups formed by ring opening of epoxy groups), etc.
- the base concentration can be reduced.
- the refractive index of the photoactive compound (C) is further increased by polymerization than before polymerization. Therefore, the resin matrix is preferably designed so as to have a refractive index lower than that of the photoactive compound (C). Therefore, the photoactive compound (C) is preferably a compound having a relatively high refractive index and having an aromatic ring, a hetero ring, an alicyclic structure, bromine, chlorine or the like. The resin matrix is preferably designed not to have the above structure. The greater the refractive index difference between the resin matrix and the photoactive compound (C), the higher the diffraction efficiency.
- the polyisocyanate (A1) used for the resin matrix (A) is not particularly limited as long as it has two or more isocyanate groups in one molecule.
- the number of isocyanate groups contained in the polyisocyanate (A1) is usually not particularly limited as long as it is 2 or more, and particularly preferably 3 or more. If the number of isocyanate groups is too small, the hardness required for the matrix may not be obtained. If the number of isocyanate groups is excessive, recording sensitivity tends to increase.
- the upper limit of the number of isocyanate groups is not particularly limited, but is usually about 20 or less isocyanate groups per molecule of polyisocyanate (A1). In this case, the range of the isocyanate group content (NCO%) contained in the polyisocyanate (A1) is usually 1% to 80%, preferably 3% to 60%. Used.
- Examples of the polyisocyanate (A1) used in the present embodiment include aliphatics such as hexamethylene diisocyanate, lysine methyl ester diisocyanate, and 2, 4, 4 trimethylhexamethyylene diisocyanate.
- the multimer is preferably a 3-7 mer of these compounds.
- reaction material with polyhydric alcohols such as water, a trimethylol ethane, a trimethylol propane, etc. are mentioned.
- polyhydric alcohols such as water, a trimethylol ethane, a trimethylol propane, etc. are mentioned.
- Hexamethylene diisocyanate multimers or derivatives thereof are particularly preferred.
- Examples of such "compounds having two or more active hydrogens in the molecule” include, for example, ethylene glycolol, propylene glycolanol, 1,4 butanediol, 1,5-pentanediol, and 3-methylolene 1 , 5-pentanediol, 1, 6-hexanediol, neopentylene glycoleno, gentylene glycolanol, 1,4-cyclohexanediol, 1,4-sic hexanedimethanol, decamethylene glycol, polyethylene glycol, Use polytetramethylene glycol, ethylenediamine, propylenediamine, isophoronediamine, 4,4 'diaminodicyclohexylmethane, 2,2,4 trimethylhexamethylenediamine, 1,4 diaminocyclohexane, etc. Can do.
- the molecular weight of the polyisocyanate is a number-average molecular weight of 100 or more and 50,000 or less, preferably S, more preferably ⁇ is 150 or more and 10,000 or less, and more preferably ⁇ is 150 or more and 5,000 or less. . If the number average molecular weight is excessively small, the crosslink density increases, so that the hardness of the matrix becomes too high and the recording speed may decrease. On the other hand, if the number average molecular weight is excessively large, the compatibility with other components may decrease, or the crosslink density may decrease, so that the hardness of the matrix becomes too low and the recorded content may be lost.
- the polyisocyanate (A1) contains constituents other than the isocyanate group within the range that does not significantly impair the effects of the present invention!
- the upper limit of the number of hydroxyl groups is not particularly limited, but is usually preferably 5 or less. If many hydroxyl groups remain in the matrix, the matrix becomes more hygroscopic and may affect the storage stability of the record.
- the poly-strength prolataton polyol is obtained by reacting the rataton with a diol or a polyhydric alcohol.
- Examples of the ratataton include ⁇ -force prolatatatone, ⁇ -force prolatathone, ⁇ -force prolacton, ⁇ -force prolacton, ⁇ -methinolet ⁇ -force prolatathon, ⁇ -methinolet ⁇ -force prolatathone, and the like.
- diol or polyhydric alcohol examples include ethylene glycol, propylene glycol, 1,4 butanediol, 1,5-pentanediol, 3-methyl-1,5-pentanediol, and 1,6-hexanediol.
- Neopentinoglycol diethylene glycol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, decamethylene glycol, polyethylene glycol, polytetramethylene glycol and the like.
- Examples of commercially available poly-strength prolataton polyols obtained from the reaction of one-strength prolatatone include, for example, praxenole 205, praxenore 210, praxenore 220, praxenore 230, praxenore 240, praxenore 303, praxenore 305, 308, Plaxel 312, Plaxel 320 (all are trade names manufactured by Daicel Chemical Industries, Ltd.)
- polycarbonate polyol a compound obtained by a dealcoholization condensation reaction between a glycol and a dialkyl carbonate (eg, dimethyl carbonate, jetyl carbonate, etc.); a dephenol condensation reaction between a glycol and a diphenyl carbonate A compound obtained by a deglycolization condensation reaction between glycols and carbonates (for example, ethylene carbonate, diethyl carbonate, etc.), etc.
- glycols examples include aliphatic diols such as 1,6 hexanediol, diethylene glycol, propylene glycolanol, 1,4 butanediole, 3-methanole 1,5pentanediole, and neopentyl glycol; Alicyclic diols such as 1,4-cyclohexanediol and 1,4-cyclohexanedimethanol.
- a poly (hexamethylene carbonate) polyol obtained by a condensation reaction of 1,6 hexanediol and jetyl carbonate
- examples include poly (pentylene carbonate) obtained by condensation reaction with til carbonate; 1,4 poly (butylene carbonate) obtained by condensation reaction of butanediol and jetyl carbonate.
- polycarbonate polyols include Plaxel CD CD205, Plaxel CD CD210, Plaxel CD CD220 (both trade names manufactured by Daicel Chemical Industries, Ltd.), PCDL T5651, PCDL T5652, PCDL T5650J (All of them are trade names) manufactured by Asahi Kasei Corporation.
- polyester polyols include those obtained by polycondensation of dicarboxylic acids or their anhydrides with polyols.
- dicarboxylic acid include succinic acid, adipic acid, sebacic acid, azelaic acid, dimer acid, maleic anhydride, isophthalic acid, terephthalic acid, trimellitic acid and the like.
- polyol examples include ethylene glycol, propylene glycol, 1,4-butanediol, 1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,6-hexanediol, and neopentyl glycol.
- polyester polyols examples include polyethylene adipate, polybrylene adipate, and polyhexamethylene adipate.
- Commercially available polyester polyols include Ade force New Ace F series, Ade force New Ace ⁇ series, Ade force New Ace NS series (trade name, manufactured by Ade force Co., Ltd.), Kuraray Polyol ⁇ —2010, ⁇ —4011, ⁇ —1020 (all Kuraray Co., Ltd., trade names), etc., C—1000, C—1066, U—21, U—24, U—53, U—253, U—502, U— 118mm (V, Missouri made by Mitsui Chemicals Polyurethane Co., Ltd., trade name).
- the water absorption of the recording layer can be suppressed to 1.5% by weight or less.
- the concentration of the hydrophilic functional group contained in the recording layer is greatly restricted, and the selection of the raw material for the composition for forming a volume hologram recording layer tends to be restricted.
- the resin matrix (A) contains other components in addition to the above-described polyisocyanate (A1) and polyol (A2), as long as not departing from the spirit of the present invention. May be.
- Examples of such other components include ethylene glycol, propylene glycol, 1,4 butanediol, 1,5-pentanediol, and 3-methylolene for the purpose of changing the physical properties of the resin matrix (A).
- a catalyst or an additive can be blended.
- catalysts include conventional urethanization reaction catalysts; for example, tin-based catalysts such as dibutyltin dilaurate, dioctyltin dilaurate, and dibutyltin ditatoate; tertiary amines such as triethylamine and triethylenediamine A catalyst is mentioned.
- tin-based catalysts such as dibutyltin dilaurate, dioctyltin dilaurate, and dibutyltin ditatoate
- tertiary amines such as triethylamine and triethylenediamine A catalyst is mentioned.
- the amount of the catalyst used is usually 0.001% by weight or more, preferably 0.001% by weight or more, as a ratio to the resin matrix (A). Further, it is usually 10% by weight or less, preferably 5% by weight or less. If the amount of catalyst used is too small, curing may take too long. On the other hand, if the amount used is excessive, it may be difficult to control the curing reaction. There is a match.
- the resin matrix (B) used in the volume hologram recording layer forming composition of the present embodiment comprises an epoxy compound (B1) having two or more epoxy groups in one molecule, and a curing agent (B2). Contains at least.
- the type of epoxy compound (B1) used for the resin matrix (B) is not particularly limited as long as it has two or more epoxy groups in one molecule. There are cases where the number of epoxy groups is small and the hardness required for the matrix cannot be obtained.
- the upper limit of the number of epoxy groups is not particularly limited, but is usually 8 or less, preferably 4 or less. If the number of epoxy groups is excessively large, it takes a long time to consume the epoxy groups, and it may take too much time S to form the matrix.
- Examples of the epoxy compound (B1) having two or more epoxy groups in one molecule include, for example, (poly) ethylene glycol, (poly) propylene glycol, (poly) tetramethylene glycol, tri Polyglycidyl ether compounds of polyols such as methylol propane and glycerin; 3, 4-epoxycyclohexenoremethylolene 3, 4-epoxycyclohexane canolepoxylate, 3, 4-epoxy 1-methylcyclohexyl lu 3, 4-epoxy Cycloaliphatic epoxy compounds having a 4- to 7-membered cyclic aliphatic group such as 1-methylhexanecarboxylate; bisphenol A type epoxy compound, hydrogenated bisphenol A type epoxy compound, bisphenol F type Examples thereof include epoxy compounds, phenol or cresol nopolac type epoxy compounds.
- the carbon number is usually 4 or more, and usually 10 or less, especially 8 or less, Furthermore, the range of 6 or less is preferable.
- the number of carbon atoms is too large, the hydrophobicity is improved, but the polarity of the molecule is lowered, so that the compatibility with a photoactive compound, a polymerization initiator, a catalyst and the like may be lowered.
- the recording speed may decrease, optical non-uniformity may occur, and this may cause data errors during hologram recording.
- alkylene oxides having a carbon number power of 10 or less examples include alkyl trimethylene oxides obtained by opening an oxetane having a substituent containing a carbon atom, and tetrahydridofurans by opening a ring. And tetramethylene oxide.
- tetramethylene oxide is particularly preferable from the viewpoint of balance between hydrophobicity, compatibility, and glass transition temperature.
- an alkylene oxide obtained by copolymerizing tetramethylene oxide with neopentyldaricol can also be used.
- the amount of alkylene oxide is usually in the range of 10% by weight or more, preferably 50% by weight or more based on the entire epoxy compound (B1). If the amount of alkylene oxide is small, the Tg of the matrix becomes too high and the recording speed may decrease. On the other hand, the upper limit is not particularly limited and is less than 100%.
- the epoxy compound (B1) satisfying the above conditions can be synthesized by a known method. In general, it is possible to synthesize using glycol having an alkylene oxide chain having a carbon number power or more and epichlorohydrin.
- the number average molecular weight of the epoxy compound (B1) is preferably 200 or more and 50,000 or less, more preferably 300 or more and 20,000 or less, and further preferably ⁇ or 300 or more and 10,000 or less. If the molecular weight is too small, the hardness of the matrix becomes too high, and the recording speed may decrease. On the other hand, if the molecular weight is excessively large, the hardness of the matrix is too small and the recorded content may be lost.
- the type of the curing agent (B2) used in the resin matrix (B) is not particularly limited as long as it is a compound having a functional group that reacts with an epoxy group, and may be appropriately selected from known compounds. Is possible.
- Examples of the curing agent (B2) include polyfunctional phenols, amines, acid anhydrides, thiols, cation polymerization initiators, and cationic polymerization initiators.
- Examples of the polyfunctional phenol include bisphenol, nopolac-type phenol resin, and resole-type phenol resin.
- amines those containing a primary amine group or a secondary amine group can be used.
- examples of such amines include ethylenediamine, diethylenetriamine and the like.
- Aliphatic polyamines such as derivatives thereof; alicyclic polyamines such as isophorone diamine, mentandiamine, N-aminoethylbiperazine and derivatives thereof; aromatic polyamines, polyamides, imidazole compounds and the like.
- Examples of the alicyclic polyamine include isophorone diamine, menthane diamine, N-aminoethyl biperazine, and derivatives thereof.
- Examples of aromatic polyamines include m-xylylenediamine, diaminodiphenylmethane, and derivatives thereof.
- Examples of the polyamide include a condensation product of a dicarboxylic acid such as dimer acid and the above-mentioned polyamine.
- Examples of imidazole compounds include imidazole, 2-methylimidazole and derivatives thereof.
- Examples of other polyamines include dicyandiamide and adipic dihydrazide.
- acid anhydrides include monofunctional acid anhydrides such as phthalic anhydride, tetrahydred phthalic anhydride, and derivatives thereof, and bifunctional acid anhydrides such as pyromellitic anhydride, Examples thereof include water benzophenone tetracarboxylic acid and derivatives thereof.
- thiols include 1,3-butanedithiol, 1,4 butanedithiol, 2,3 butanedithionole, 1,2 benzenedithionole, 1,3 benzenedithionole, 1,4 benzenedithiol 1, 10-decanedithiol, 1,2-ethanedithiol, 1,6 hexanedithiol, 1,9-nonanedithiol, etc., epomate QX10 (manufactured by Japan Epoxy Resin Co., Ltd.), epomate QX11 (Japan Epoxy Resin Co., Ltd.) Dithiols such as thiocols; thiocol (made by Toray Fine Chemicals Co., Ltd.), cupcure 3-800 (made by Japan Epoxy Resin Co., Ltd.), and epicure QX40 (made by Japan Epoxy Resin Co., Ltd.) and thiol compounds such as polythiol .
- thiols such
- the anion polymerization initiator generates anion by heat or irradiation with active energy rays, and examples thereof include amines.
- examples of amines include amino group-containing compounds such as dimethylbenzilamine, dimethylaminomethylphenol, 1,8 diazabicyclo [5.4.0] undecene 7, and derivatives thereof; imidazole, 2-methylimidazole, 2 Imidyl compounds such as ethyl 4-methylimidazole, and derivatives thereof A conductor etc. are mentioned.
- the cationic polymerization initiator generates a cation by irradiation with heat or active energy rays, and examples thereof include an aromatic onium salt.
- an aromatic onium salt for example, SbF
- the curing agent (B2) is preferably at least one selected from the group consisting of amines, acid anhydrides, thiols, anion polymerization initiators, and cationic polymerization initiators. This is because these have a high curing rate and are excellent in matrix productivity.
- the amount of the curing agent (B2) used differs depending on whether or not the curing agent (B2) is a cation initiator or a cationic initiator.
- the amount used is usually a percentage of the number of moles of epoxy groups.
- the amount used is usually 0.001% by weight or more, particularly 0.01% by weight, based on the ratio to the resin matrix (B). % Or more, and usually 50% by weight or less, preferably 10% by weight or less. If the amount of curing agent used is too small, the initiator concentration may be too low and the polymerization reaction may take too much time S. On the other hand, if the amount of curing agent used is excessive, continuous ring-opening reaction may not occur as a polymerization reaction.
- any of the various curing agents illustrated above may be used alone, or two or more may be used in any combination and ratio. When two or more kinds of curing agents are used in combination, the total amount thereof should be within the above range.
- the imidazole compound can also function as an anion initiator. It is also possible to function as amines. That is, when an imidazole compound is used in an amount within a preferred range as an anion initiator, it functions as an anion initiator, and when used in an amount within a preferred range as an amine, it functions as an amine. Therefore, considering this point, the usage amount may be selected according to the target function.
- the resin matrix (B) in the present embodiment may contain other components in addition to the above-described epoxy compound (B1) and curing agent (B2) as long as it does not contradict the gist of the present invention.
- additives can be blended in the resin matrix (B) as necessary.
- the additive include a curing accelerator.
- curing accelerators include tertiary amines such as benzyldimethylamine; imidazoles such as 2-ethyl-4-methylimidazole; tertiary phosphines such as triphenylphosphine; tetrabutylphosphonium bromide And quaternary phosphonium salts such as tetramethyl ammonium bromide.
- tertiary amines such as benzyldimethylamine
- imidazoles such as 2-ethyl-4-methylimidazole
- tertiary phosphines such as triphenylphosphine
- tetrabutylphosphonium bromide tetrabutylphosphonium bromide
- quaternary phosphonium salts such as tetramethyl ammonium bromide.
- the use amount of the curing accelerator is usually 0.001% by weight or more, more preferably 0.001% by weight or more, and usually 10% by weight or less, especially 5% by weight or less as a ratio to the resin matrix (B).
- a range is preferred. If too little curing accelerator is used, curing may take too much time. On the other hand, if the amount of the curing accelerator used is too large, it may be difficult to control the curing reaction. When two or more kinds of curing accelerators are used in combination, the total amount thereof should satisfy the above range.
- polystyrene resin examples include polyethylene glycol, polypropylene glycol, poly 1,4 butane diol, poly 1,5-pentane diol, poly 3 -Methinore 1,5-pentanediole, poly 1,6 xanthionole, polyneopentino glycole, diethylene glycol, poly 1,4-cyclohexanediol, poly 1,4-cyclohexanedimethanol, polydecamethylene glycol, polytetra Examples include polyols such as methylene glycol.
- the resin matrix (B) has an alkylene oxide having 4 to 10 carbon atoms, and other than an epoxy compound (B 1) having two or more epoxy groups in one molecule.
- Other epoxy compounds can be used.
- the concentration of hydrophilic functional groups such as hydroxyl groups, isocyanate groups, urethane bonds, urea bonds, etc. contained in the recording layer is reduced as much as possible, and hydrophobic additives are introduced into the recording layer forming composition. It is effective to do.
- a measure for reducing the hydrophilic functional group concentration in the resin matrix for example, a method using a relatively high molecular weight polyisocyanate or polyol; a reaction contained in a polyisocyanate or polyol, etc. A method using a small number of functional groups! /, Or a method using as many unreacted hydroxyl groups or isocyanate groups as possible.
- the concentration of the hydrophilic functional group in the recording layer is 0.5 meq to 50 meq, preferably 1 meq to 25 meq, more preferably 1 meq to 20 mm per lg of the recording layer. Desirable to be in the equivalent range! / ,.
- the kind of photoactive compound (C) used in the composition for forming a volume hologram recording layer of the present embodiment is not particularly limited, and can be appropriately selected from known compounds. Usually, a polymerizable monomer is used.
- polymerizable monomer examples include a cationic polymerizable monomer, an anion polymerizable monomer, and a radical polymerizable monomer.
- Examples of the cationic polymerizable monomer include (1) a compound having an oxysilane ring, (2) styrene and derivatives thereof, (3) burnaphthalene and derivatives thereof, (4) butyl ethers, (5) N butyl compounds, (6)
- Examples include compounds having an oxetane ring. Among them, it is preferable to use a compound having at least an oxetane ring. Further, it is preferable to use a compound having an oxetane ring together with a compound having an oxetane ring.
- Examples of the compound having an oxysilane ring include prepolymers having two or more oxysilane rings in one molecule.
- Examples of such prepolymers include cycloaliphatic polyepoxies, polyglycidyl esters of polybasic acids, polyglycidyl enoate of polyhydric alcohols, polyglycidino ol of polyvalent xylanolene glycolenoles.
- Examples include etherols, aromatic polyol polyglycidyl ethers, aromatic polyol polyglycidyl ethers hydrogenated compounds, urethane polyepoxy compounds, and epoxidized polybutadienes.
- These prepolymers may be used alone or in combination of two or more in any combination and ratio! /.
- styrene and its derivatives examples include styrene, p-methylstyrene, p-methoxystyrene, ⁇ -methylstyrene, ⁇ -methyl- ⁇ -methylstyrene, ⁇ -methylstyrene, ⁇ -methoxy-13-methylstyrene, dibutenebenzene, etc. Is mentioned.
- burnaphthalene and derivatives thereof include 1-bur naphthalenes, ⁇ -methylolene 1-bur naphthalenes, / 3-methyl -1- 1-bur naphthalenes, 4-methyl 1-bin naphthalenes. 4-methoxy-1-burnaphthalene and the like.
- butyl ethers include isobutyl ether, ethyl bulle ether, phenino levinino le etherenore, ⁇ methino levinino levinino le tenole, ⁇ methoxy phenino levinyl ether, ⁇ methyl phenyl And vinyl ether, ⁇ -methylisobutyl vinyl ether, 13-chloro isobutyl butyl ether, and the like.
- bulle compounds include: ⁇ ⁇ Bull carbazole, ⁇ ⁇ ⁇ Bull pyrrolidone, ⁇ Vinino lane donole, ⁇ Vinino repiro mononore, ⁇ Vinino levenothiazine, ⁇ Vinole acetoanilide, ⁇ —Buluetilacetamide, ⁇ vinyl succinimide, ⁇ vinyl phthalimide, ⁇ bull force prolatatam, ⁇ ⁇ burimidazole and the like.
- Examples of the compound having an oxetane ring include various known oxetane compounds described in, for example, JP-A Nos. 2001-220526 and 2001-310937. Any one of the above-exemplified cationic polymerizable monomers may be used alone, or two or more of them may be used in any combination and ratio.
- anion polymerizable monomer examples include hydrocarbon monomers and polar monomers.
- hydrocarbon monomer examples include styrene, ⁇ -methylstyrene, butadiene, isoprene, bullypyridine, buranthracene, and derivatives thereof.
- Examples of polar monomers include methacrylic acid esters such as methyl methacrylate, ethyl acetate and isopropyl methacrylate; acrylate esters such as methyl acrylate and ethyl acrylate; methyl vinyl ketone and isopropyl vinyl.
- Vinyl ketones such as ketone, cyclohexyl vinyl ketone, and phenyl vinyl ketone; isopropenyl ketones such as methyl isopropenyl ketone and phenyl isopropenyl ketone; acrylonitrile, acrylamide, nitroethylene, methylene malonate, cyanoacrylate, And other polar monomers such as vinylidene cyanide.
- Any of the above-exemplified anion polymerizable monomers may be used alone, or two or more may be used in any combination and ratio.
- the radical polymerizable monomer is a compound having one or more ethylenically unsaturated double bonds in one molecule. Examples thereof include (meth) acrylic acid esters, (meth) acrylamides, bulule esters, Examples thereof include styrenes.
- Examples of (meth) acrylic acid esters include methyl (meth) acrylate, ethyl (meth) acrylate, ( ⁇ or i) propyl (meth) acrylate, (ni sec or t) petit (Meth) Athalylate, Aminore (Meth) Athalylate, (Meth) Adamantyl Acrylate, Black-Ethyl (Meth) Athalylate, 2-Hydroxyethyl (Meth) Athalylate, 2-Hydroxypropyl (Meth) Atharily 2-hydroxypentyl (meth) acrylate, cyclohexyl (meth) acrylate, allyl (meth) acrylate, trimethylolpropane mono (meth) acrylate, pentaerythritol mono (meth) acrylate, benzyl (meta) ) Atarylate, Methoxybenzil (meth) atalylate, Black Benzyl
- Examples of (meth) acrylamides include (meth) acrylamide, N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide, N-propyl (meth) acrylamide, N-butyl (meth) acrylamide, N-benzyl (Meth) acrylamide, N hydroxyethyl (meth) acrylolamide, N phenyl (meth) acrylamide, N tolyl (meth) acrylamide, N— (hydroxyphenyl) (meth) acrylamide, N- (sulfamoylphenyl) (meth) ) Acrylamide, N (phenylsulfonyl) (meth) acrylamide, N (tolylsulfonyl) (meth) acrylolamide, N, N dimethyl (meth) acrylamide, N methyl-N-phenyl (meth) acrylamide, N hydroxyethyl N-methyl (meth)
- butyl esters include butyl acetate, butyl butyrate, burbenzoate, benzoate butyl, butyl butyl benzoate, black mouth benzoate butyl, 4-oxyl benzoate butyl, 4 ethyl Examples include butyl benzoate, 4-methyl benzoate, 3-methyl benzoate, 2-methyl benzoate, 4-phenyl benzoate and pivalate.
- styrenes examples include styrene, p-acetyl styrene, p-benzoyl styrene,
- Any one of the above exemplified radical polymerizable monomers may be used alone, or two or more thereof may be used in any combination and ratio.
- any of the above-exemplified cationic polymerizable monomers, anion polymerizable monomers, and radical polymerizable monomers may be used, or two or more of them may be used in combination.
- NCO is the isocyanate group concentration.
- OH is the hydroxyl group concentration.
- the ratio of the photoactive compound (C) to 100 parts by weight of the resin matrix (A) and / or resin matrix (B) is 0.5 parts by weight or more and 100 parts by weight or less, and more preferably 1 part by weight or more and 50 parts by weight or less. It is preferable that If the amount of the photoactive compound used is excessively small, the change in refractive index is small and the recording efficiency may be low. On the other hand, if the amount of photoactive compound used is excessively large, a large amount of unreacted photoactive compound remains, which may cause bleeding out when used as a recording material.
- composition for forming a volume hologram recording layer of the present embodiment is not limited to the above-described resin matrix (A), resin matrix (B), and photoactive compound (C), as long as not departing from the spirit of the present invention. It may contain components.
- composition for volume hologram recording material of the present embodiment is blended with any additive as necessary for controlling the excitation wavelength and excitation energy of the sensitizer, controlling the reaction, improving the characteristics, etc. can do.
- additive include the following compounds.
- Examples of the compound that controls excitation of the sensitizer include a sensitization aid and the like.
- Examples of the compound used for controlling the reaction include a polymerization initiator, a chain transfer agent, a polymerization terminator, a compatibilizing agent, a reaction aid and the like.
- any one of these additives may be used alone, or two or more thereof may be used in any combination and ratio.
- the amount of the additive used is generally 0.001% by weight or more, particularly 0.01% by weight or more, and usually 30% by weight or less, especially 10% by weight, based on the composition for forming a volume hologram recording layer of the present invention.
- the following range is preferable. When two or more additives are used in combination, the total amount thereof should be within the above range.
- examples of suitable additives when the photoactive compound (C) is a radical polymerizable monomer include a polymerization initiator and a sensitizer. These will be described in detail below.
- any known radical photopolymerization initiator can be used. Examples include azo compounds, azide compounds, organic peroxides, organic borates, onium salts, bisimidazole derivatives, titanocene compounds, iodine salts, organic thiol compounds, halogenated hydrocarbon derivatives, and the like. Any one of these may be used alone, or two or more may be used in any combination and ratio. Of these, titanocene compounds and acylphosphine oxide compounds are preferred as polymerization initiators because of the polymerization reaction occurring in the visible light region.
- a titanocene compound is used as a polymerization initiator
- the kind thereof is not particularly limited, but is described in, for example, JP-A-59-152396, JP-A-61-151197, and the like. Can be used by appropriately selecting from various titanocene compounds
- titanocene compounds include dicyclopentadiene Ti-dichloride, dicyclopentageninore Ti-bis fenenore, dicyclopentageninole Ti bis 2, 3, 4, 5, 6 Pentafunoreolopheny 1-inore, dicyclopentageninolet Ti—bis 2, 3, 5, 6 Tetrafunoleololophene 1-inore, dicyclopentageninore —Ti—Bis 2, 4, 6—Trifno Leo Mouth Feni 1-inole, G-cyclopentageninore Ti Bis 2, 6 Gifnoreoro Fennie 1-inole, Gicyclopenta Geninore Ti-bis 1, 2, 4-Difluoro Phenyl-1-yl, di-methylcyclopentadiene Ti-bis 2, 3, 4, 5, 6-Pentafluoropheny 1-yl, dimethylcyclopentaenyl-Ti Ti-bis-1,3 , 5, 6 Tetrafluorophenyl 1-y
- dicyclopentagenyl 1 Ti bis 1 2, 6 difluoro 1- (Pyri 1-yl) pheny 1-yl has absorption up to about 550 nm, so it is an Argon ion laser as a light source. (488 nm) and FD Nd / YAG laser (532 nm) can be used, and since it is highly versatile, it is preferably used as a polymerization initiator.
- acylphosphine oxide compounds include monofunctional initiators that have only one light-excited point in a molecule, and two light-excited points in a molecule 2 Examples include functional initiators.
- Examples of such monofunctional initiators include triphenylphosphine oxide, 2,4,6 trimethylbenzoyldiphenylphosphine oxide, 2,6 dichlorobenzene diphenylphosphine oxide, and the like. It is done.
- bifunctional initiator examples include bis (2, 4, 6 trimethylbenzoyl) phenyl phosphine oxide, bis (2, 6 dimethoxybenzoyl) 2, 4, 4 trimethylpentyl phosphine oxide, bis (2,6 dichlorobenzoyl) -4 propylphenylphosphine euside, bis (2,6 dichlorobenzoyl) 2,5 dimethylphenylphosphine oxide and the like.
- One of these various polymerization initiators may be used alone, or two or more thereof may be used in any combination and ratio! /.
- the amount of the polymerization initiator used is usually 0.1% by weight or more, particularly 0.5% by weight or more, and usually 10% by weight or less, as a ratio to the total solid content of the composition for volume hologram recording materials. Of these, the range of 5% by weight or less is preferable. If the amount of the polymerization initiator used is too small, the amount of radicals generated will be small, so the rate of photopolymerization will be slowed down, and hologram recording Recording sensitivity may be low. On the other hand, if the amount of the polymerization initiator used is excessively large, radicals generated by light irradiation recombine with each other or disproportionate, so that the contribution to photopolymerization is reduced. May decrease. When two or more polymerization initiators are used in combination, the total amount thereof should be within the above range.
- the sensitizer it can be arbitrarily selected from various known sensitizers.
- the type of initiator used is appropriately selected according to the wavelength of the laser beam used for recording.
- sensitizers include JP-A-5-241338, JP-A-2-69, JP-B-2-55446, JP-B-2-30321. And compounds described in JP-A-6-116313 and JP-A-47-2528.
- a sensitizer a colored compound such as a dye as described above is often used to absorb visible and ultraviolet laser light, but the final hologram optical recording medium is colorless.
- a cyanine dye it is preferable to use as a sensitizer.
- cyanine dyes are generally easily decomposed by light
- the cyanine dyes in the volume hologram recording material are decomposed by post-exposure, that is, by leaving them for several hours to several days under room light or sunlight.
- post-exposure that is, by leaving them for several hours to several days under room light or sunlight.
- the amount of the sensitizer is a ratio with respect to the force polymerization initiator that needs to be increased or decreased depending on the thickness of the layer containing the volume hologram recording material of the present invention. 1% by weight or more, usually 10% by weight or less, and preferably 5% by weight or less. If the amount of the sensitizer used is too small, the initiator efficiency may be reduced, and recording may take a long time. On the other hand, if the amount of sensitizer used is excessively large, the absorption of light used for recording and reproduction increases, and it may be difficult to reach the light in the depth direction. When two or more sensitizers are used in combination, the total amount thereof should satisfy the above range.
- plasticizers added for improving the reaction efficiency and adjusting the physical properties of the recording layer, and additives for controlling the water absorption rate of the recording layer can be mixed.
- examples include phthalic acid esters such as dioctyl phthalate, diisonoyl phthalate, diisodecyl phthalate, and diundecyl phthalate; bis (2-ethylhexyl) adipate, diisonoyl adipate, and dibutyl butyl adipate.
- Adipates such as dioctyl sebacate and dibutyl sebacate; phosphates such as tricresyl phosphate; citrates such as tributyl acetyl citrate; trimellitic esters such as trioctyl trimellitic acid ; Epoxidized soybean glycol ester; Over end alkoxylated polyals crisp glycol such as Le like.
- a compound having a hydrophobic structure is preferred.
- examples of such are 1H-perfluorodecane, perfluorododecane, novnoreo oral heptane, 1H-perfluoronore heptane, novoleo oral hexane, 1H perfluoro oral hexane, perfluoro Perfluoro compounds such as octane, nofanolol 2,11-dimethyldodecane, perfluoro-2,7 dimethyloctane, perfluoro-3,7 dimethyloctanoic acid, perfluorodecalin, perfluoro-1,10-decanedicarboxylic acid Fluorine-containing compounds; polyether-modified silicones, methylstyryl-modified silicones, alkyl-modified silicones, fatty acid ester-modified silicones, alkoxy-modified silicones, silicone compounds
- the usage fee for these additives is usually from 0.01% by weight to 50% by weight, preferably from 0.05% by weight to 20% by weight, based on the total solid content of the composition for forming a volume hologram recording layer. It is used in the range of weight percent or less. If the amount added is too small, the water absorption rate may not be reduced sufficiently. If the amount added is excessively large, the transparency of the recording layer tends to decrease, and bleeding out of the additive tends to become noticeable.
- the composition for forming a volume hologram recording layer of the present embodiment is used for a volume hologram recording material.
- a volume hologram recording material for example, characteristics such as low hygroscopicity, excellent storage stability, and excellent compatibility. It can.
- the volume hologram recording material using the composition for forming a volume hologram recording layer of the present embodiment is hereinafter referred to as “volume hologram recording material of the present embodiment”.
- the volume hologram recording material of the present embodiment may be composed of only the volume hologram recording layer forming composition of the present embodiment, or may contain other components! / Yo! / ⁇ .
- Other components are not particularly limited, but examples include various additive agents such as a light dispersant and a coloring material. The content of other components is arbitrary as long as the effects of the present invention are not significantly impaired.
- the volume hologram optical recording medium of the present embodiment includes at least a transparent substrate and a recording layer configured to contain a synthetic resin. There are no restrictions on other specific configurations of the volume hologram optical recording medium of the present embodiment.
- a volume hologram optical recording medium according to an embodiment of the present invention (this may be referred to as “optical recording medium of the present embodiment”) will be described in detail.
- the optical recording medium of the present embodiment is configured to include at least a transparent substrate and a recording layer formed using the volume hologram recording material of the present embodiment described above.
- the optical recording medium of the present embodiment is configured to include other layers as necessary.
- the recording layer is a layer on which information is recorded. Information is usually recorded as a hologram.
- the thickness of the recording layer is not particularly limited and may be appropriately determined in consideration of the recording method and the like. Generally, it is usually at least lrn, preferably at least 10 m, and usually at most lcm, preferably The range is less than 2, OOO ⁇ m. If the recording layer is too thick, the selectivity of each hologram may be lowered during multiplex recording on an optical recording medium, and the degree of multiplex recording may be reduced. If the recording layer is too thin, it is difficult to form the entire recording layer uniformly, and it may be difficult to perform multiplex recording with uniform hologram diffraction efficiency and a high S / N ratio.
- an optical recording medium has a transparent substrate, and a recording layer and other layers are stacked on the transparent substrate to constitute an optical recording medium.
- the transparent substrate has the required strength and durability, any transparent substrate with no particular restrictions on the details thereof can be used.
- the shape of the transparent substrate is not limited, but is usually formed in a flat plate shape or a film shape.
- Examples of the material for the transparent substrate include organic materials such as acrylic, polyethylene terephthalate, polyethylene naphthoate, polycarbonate, polyethylene, polypropylene, vinylmonopolyolefin, polystyrene, and cellulose acetate; and inorganic materials such as glass, silicon, and quartz. It is done. Among these, polycarbonate, acrylic, polyester, amorphous polyolefin, glass and the like are preferable, and polycarbonate, acrylic, amorphous polyolefin, and glass are more preferable.
- a transparent substrate coated with a metal such as gold, silver, or aluminum, or a dielectric such as magnesium fluoride or zirconium oxide may be used.
- the thickness of the transparent substrate is not particularly limited, but it is usually preferably in the range of 0.1 mm or more and 1 mm or less. If the transparent substrate is too thin, the mechanical strength of the optical recording medium may be insufficient and the substrate may be warped. If it is too thick, the amount of transmitted light may be reduced and the cost may be further increased. Processing may be performed. This surface treatment is usually performed to improve the adhesion between the transparent substrate and the recording layer. Examples of the surface treatment include performing a corona discharge treatment on the transparent substrate or forming an undercoat layer in advance on the transparent substrate.
- the composition of the undercoat layer may be a halogenated phenol or a partial Examples include hydrolyzed butyl chloride, butyl acetate copolymer, and polyurethane resin.
- the surface treatment may be performed for purposes other than the improvement of adhesiveness.
- examples include a reflective coating process that forms a reflective coating layer made of a metal such as gold, silver, or aluminum; a dielectric coating process that forms a dielectric layer such as magnesium fluoride or zirconium oxide. Is mentioned. These layers may be formed as a single layer or two or more layers.
- These surface treatments may be provided for the purpose of controlling the gas and moisture permeability of the substrate.
- the storage stability of the medium is improved by reducing the water absorption rate of the recording layer, but the function of suppressing the permeability of gas and moisture to the transparent substrate sandwiching the recording layer is also included. By providing this, the reliability of the medium can be further improved.
- the transparent substrate may be provided only on either the upper side or the lower side of the recording layer of the optical recording medium of the present embodiment, or may be provided on both.
- a transmissive or reflective hologram can be recorded.
- a transparent substrate having reflection characteristics on one side is used, a reflection hologram can be recorded.
- a pattern for data address may be provided on the transparent substrate.
- a pattern may be formed on a reflective layer (described later) or a combination of these may be formed on the transparent substrate itself. Good.
- the optical recording medium of this embodiment may be provided with other layers in addition to the recording layer and the transparent substrate described above.
- other layers include a protective layer, a reflective layer, an antireflection layer (antireflection film), and the like.
- the protective layer is a layer for preventing adverse effects such as a decrease in sensitivity and deterioration of storage stability due to oxygen and moisture.
- the force S can be used to form a layer made of a water-soluble polymer, an organic / inorganic material, etc. as a protective layer.
- the reflective layer is formed when the optical recording medium is configured in a reflective type. Reflective light In the case of a recording medium, the reflective layer may be formed between the transparent substrate and the recording layer, or may be formed on the outer surface of the transparent substrate. It is preferable that
- an antireflection film is provided on the side on which object light and readout light are incident and emitted, or between the recording layer and the transparent substrate. Also good.
- the antireflection film functions to improve the light utilization efficiency and suppress the generation of force and ghost images.
- the optical recording medium manufacturing method of the present embodiment can be manufactured by any method without any particular limitation.
- the volume hologram recording material of the present embodiment can be manufactured by coating a transparent substrate without a solvent and forming a recording layer.
- any coating method can be used. Specific examples include a spray method, a spin coat method, a wire bar method, a dip method, an air knife coating method, a roll coating method, a blade coating method, a doctor roll coating method, and the like.
- the volume hologram recording material of the present embodiment is molded in a mold, or coated on a release film.
- the recording layer can also be formed using a method such as punching a mold.
- the volume hologram recording material of the present embodiment described above may be mixed with a solvent to prepare a coating solution, which may be coated on a transparent substrate and dried to form a recording layer.
- a coating solution which may be coated on a transparent substrate and dried to form a recording layer.
- any coating method can be used. Examples include the same method as the above-described coating method.
- the type of solvent is not particularly limited! Usually, it is preferable to use a material that has sufficient solubility for the components used, gives good coating properties, and does not attack the transparent substrate.
- solvents examples include ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, and methyl amyl ketone; aromatic solvents such as toluene and xylene; methanol, ethanol, propanol, and n-butanol.
- Alcohol solvents such as diacetone alcohol, ketone alcohol such as 3 hydroxy-3 methyl-2 butanone Solvents: Ether solvents such as tetrahydrofuran and dioxane; Halogen solvents such as dichloromethane, dichloroethane, chloroform, etc .; Cellosolebol solvents such as acetate; propylene glycol solvents such as propylene glycol monomethyl ether, propylene glycol monoethylenoate, propylene glycol monomono butylene ethere, propylene glycol monomethyl ether acetate; ethyl acetate, butyl acetate, acetic acid Amyl, ester solvent of butyl acetate; tetrafluoropropanol, otata fanololopenentanol, hexafnoroleorobutanol, etc.
- Ether solvents such as tetrahydrofuran and dioxane
- Recono solvent High polar solvents such as dimethylformamide, dimethylacetamide, N-methylpyrrolidone, dimethyl sulfoxide; Chain hydrocarbon solvents such as n-hexane, n-octane; Cyclohexane, methylcyclohexane, etc. Or a mixed solvent of these cyclic hydrocarbon solvents.
- solvents may be used alone or in combination of two or more in any combination and ratio.
- the amount of the solvent used is about 1% by weight or more and 1,000% by weight or less.
- the volume hologram recording material of the present embodiment has a small amount of volatile components! /
- the volume hologram recording material of the present embodiment is molded by, for example, an injection molding method or a hot press method. Can be manufactured.
- the molded body when the molded body has sufficient thickness, rigidity, strength, etc., the molded body can be used as it is as the optical recording medium of the present embodiment.
- the resin matrix (A) or the resin matrix (B) described above is molded into a desired shape, and then impregnated with the photoactive compound (C) or other additives, whereby the volume of the present invention is increased.
- a recording layer made of a hologram recording material may be produced.
- the optical recording medium of the present embodiment manufactured by the above procedure can take the form of a self-supporting slab or a disk, and can be used for applications such as a three-dimensional image display device, a diffractive optical element, and a large capacity memory. [0141] [II-5.Recording and playback method]
- Both writing (recording) and reading (reproduction) of information with respect to the optical recording medium of the present embodiment are performed by light irradiation.
- the photoactive compound (C) is a polymerizable monomer
- the light that can cause the polymerization and concentration change is converted into object light. (Also called recording light).
- the object light in order to record information as a volume hologram, the object light is irradiated onto the recording layer together with the reference light so that the object light and the reference light interfere with each other in the recording layer.
- the interference light causes a change in the photoactive compound (C) in the recording layer (for example, when the photoactive compound (C) is a polymerizable monomer, its polymerization and concentration change).
- the interference fringes cause a refractive index difference in the recording layer, and the interference fringes recorded in the recording layer are recorded as holograms on the recording layer.
- the recording layer is irradiated with predetermined reproduction light (usually reference light).
- the irradiated reproduction light is diffracted according to the interference fringes. Since the diffracted light contains the same information as the recording layer, the information recorded on the recording layer can be reproduced by reading the diffracted light with an appropriate detection means.
- the wavelength range of the object light, the reproduction light, and the reference light is arbitrary depending on each application, and may be the visible light region or the ultraviolet region.
- these lights for example, solid lasers such as Noreby, glass, Nd-YAG, Nd-YVO, etc .; GaAs
- Diode lasers such as GaAs and GaN; gas lasers such as helium neon, anoregon, krypton, excimer, and CO; lasers with excellent monochromaticity and directivity, such as dye lasers with dyes.
- the irradiation amounts of the object light, the reproduction light, and the reference light are not limited, and the irradiation amount is arbitrary as long as recording and reproduction are possible. However, if the amount is extremely small, the chemical change of the photoactive compound (C) may be incomplete, and the heat resistance and mechanical properties of the recording layer may not be sufficiently expressed. There is a risk that the layer components (the volume hologram recording material of the present invention) may deteriorate. Therefore, the object light, the reproduction light, and the reference light are usually 0.1 l / cm in accordance with the composition of the volume hologram recording material of the present invention used for forming the recording layer, the type and blending amount of the polymerization initiator, and the like. 2 above, is irradiated at 20j / cm 2 or less.
- Sample bottle 1 is a compound obtained by adding 2-ethylhexanol to a trimer of hexamethylene diisocyanate as polyisocyanate (A1) (isocyanate group content 20. 8%) 5.25 g, photoactive compound (C) as paracumylphenol EO-modified (n 1) talylate 1. l lg, photopolymerization initiator bis (7) 5 — 2, 4-cyclopentagen 1-yl) one bis (2, 6 —Difluoro-1- (1H-pyrrole-1-yl) monophenol) Titanium 0 ⁇ 056 g was weighed and stirred until each component was dissolved.
- sample bottle 1 and the sample bottle 2 were put in a bell jar and degassed in a vacuum for 3 hours, and then the liquids in the sample bottle 1 and the sample bottle 2 were mixed and stirred and mixed, and the bell jar was vacuumed for several minutes. I was degassed.
- the vacuum degassed liquid was poured onto a glass slide on which a 500 m thick Teflon (registered trademark) sheet was placed on the two ends as a spacer, and a slide glass was placed on the glass.
- the recording area was prepared by fixing the periphery with a clip and heating at 60 ° C for 15 hours. Hologram recording was performed using a green laser.
- Example 1 a compound obtained by adding 2-ethylhexanol to a trimer of hexamethylene diisocyanate as polyisocyanate (A1) in sample bottle 1 (isocyanate group content 20. 8%) 5.
- A1 polyisocyanate group content 20. 8%
- C Bisphenol as photoactive compound
- C FEO modified
- sample bottle 2 as a polyol (A2), 9.81 g of polycarbonate diol having a molecular weight of 800 and 0.003 g of dioctyltin dilaurate were weighed and stirred until each component was dissolved.
- Example 2 the same operation as in Example 1 was performed to produce a recording layer.
- Hologram recording was performed using a green laser.
- sample bottle 1 was charged with polyisocyanate (A1) as hexamethylene diisocyanate (2 ⁇ 18 g), photoactive compound (C) as bisphenoxyethanol fluorene diatalylate (1 ⁇ l lg), photopolymerization initiator. as bis (7] 5 - 2, 4-cyclopentadiene-1 - I le) Single-bis (2, 6-Jifuruoro one 3- (1H-pyrrol-one 1-I le) one phenyl) and Chita Niumu 0. 056G Weighed and stirred until each component was dissolved.
- polyisocyanate (A1) as hexamethylene diisocyanate (2 ⁇ 18 g
- photoactive compound (C) as bisphenoxyethanol fluorene diatalylate (1 ⁇ l lg)
- photopolymerization initiator as bis (7] 5 - 2, 4-cyclopentadiene-1 - I le) Single-bis (2, 6-Jifuruoro one 3- (1H-pyrrol
- sample bottle 2 4.50 g of a poly force prolataton triol having a molecular weight of 500 and 0.002 g of dioctyltin dilaurate were weighed as polyol (A2) and stirred until each component was dissolved.
- Example 2 the same operation as in Example 1 was performed to produce a recording layer.
- Hologram recording was performed using a green laser.
- a poly force prolataton triol having a molecular weight of 500 as a polyol (A2) and 0.002 g of dioctyltin dilaurate were weighed and stirred until each component was dissolved. Subsequently, a recording layer was produced in the same manner as in Example 1. Hologram recording was performed using a blue laser. The transmittance of the obtained recording layer at a wavelength of 405 nm was 63%.
- polyisocyanate (A1) a compound obtained by adding 2-ethylhexanol to a trimer of hexamethylene diisocyanate (isocyanate group content 20. 8%) 2.64 g, photoactive Weigh 0.22 g of N-bulu force rubazole as the compound (C) and 0.22 g of bis (2,4,6-trimethylbenzoyl) monophenylphosphine oxide as the photopolymerization initiator, and dissolve each component. Stir until
- a polyol (A2) a trifunctional polypropylene having a molecular weight of 1,000, No. 4.
- 36 g a polyylene glycol, a monolayer, an unchanging series SS-2802 (manufactured by Toray Dow Cowing Co., Ltd.) 0 ⁇ 31 g and dioctyltin dilaurate 0 ⁇ OOlg were weighed and stirred until each component was dissolved.
- sample bottle 2 as a polyol (A2), polypropylene glycol (bifunctional) 3 ⁇ 56 g and dioctyltin dilaurate 0.002 g having a molecular weight of 1,000 were weighed and stirred until each component was dissolved. Subsequently, a recording layer was produced in the same manner as in Example 1. Hologram recording was performed using a blue laser.
- B1 an epoxy compound having two or more epoxy groups in one molecule in a sample bottle 10.
- B2 Sun-Aid SI-60 (manufactured by Sanshin Chemical Co., Ltd.)
- B2 Paracumylphenol EO modified
- n 1 Atarylate 1 ⁇ l lg, as photoactive compound
- C As a photopolymerization initiator, 0.056 g of bis (2,4,6-trimethylbenzoyl) monophenylphosphine oxide was weighed and mixed with stirring until each component was dissolved.
- the mixed liquid onto a glass slide with a Teflon (registered trademark) sheet with a thickness of 500 m on both ends, cover the glass slide on it, and fix the periphery with clips.
- the recording layer was prepared by heating at 60 ° C for 15 hours. Hologram recording was performed using a blue laser.
- Example 1 As in Example 1, 6.96 g of a compound obtained by adding 2-ethylhexanol to a trimer of hexamethylene diisocyanate as a polyisocyanate (A1) in a sample bottle 1 as a photoactive compound (C) , Paracumylphenol EO modified (n 1) Atalylate 1 ⁇ 67g, photopolymerization initiator bis (7) 5 — 2, 4-cyclopentagen 1-yl) bis (2, 6-difluoro 1- (1H-pyrrole-1-yl) monophenyl) titanium 0 ⁇ 083 g was weighed and stirred until each component was dissolved.
- Sample bottle 2 was weighed with polyol (A2) as a polyol (A2) having a molecular weight of 700 g of triol having a polypropylene glycol skeleton of 0.04 g and dioctyltin dilaurate (0.008 g), and stirring until each component was dissolved.
- polyol (A2) as a polyol (A2) having a molecular weight of 700 g of triol having a polypropylene glycol skeleton of 0.04 g and dioctyltin dilaurate (0.008 g)
- Example 2 a recording layer was produced in the same manner as in Example 1. Hologram recording was performed using a green laser.
- a recording layer was prepared in the same manner as in Example 5 except that the silicone compound SS-2802 was not used among the compounds to be mixed in the sample bottle 2. Hologram recording A blue laser was used.
- Example 5 In the operation carried out in Example 5, as an epoxy compound (B1) having two or more epoxy groups in one molecule, polytetramethylene glycol having a molecular weight of 1,000 was replaced with polypropylene glycol, and other than that, A recording layer was prepared in the same manner as in 5. Hologram recording was performed using a blue laser.
- Teflon registered trademark
- the recording layer was produced by covering, fixing the periphery with a clip, and heating at 60 ° C for 15 hours.
- the recording layer obtained immediately after heating was peeled off from the glass, cut to 5 cm ⁇ 5 cm, and then immediately measured for its weight (measured at Wl, 23 ° C., 50% RH). From the weight (W2) measured immediately after being placed in an environment of 60 ° C and 90% RH for 24 hours, the moisture absorption rate (%) is expressed as [(W2) — (WD / W1) X 100 (unit:%) Table 1 shows the measurement results.
- the transparency of the obtained recording layer was judged visually based on the following criteria.
- the measurement was performed by (i) recording writeability immediately after sample preparation, (ii) record writing permission (Shelf Life) after sample moisture absorption (60 ° C, 90% RH, 72 hours), ( iii) Immediately after the sample was written, the recording / reproduction availability (Archival Life) after moisture absorption (60 ° C, 90% RH, 72 hours)! /, I got it.
- Fig. 1 is a diagram showing an outline of an apparatus used for hologram recording.
- S indicates a volume hologram recording material sample
- M1 to M3 indicate mirrors
- PBS indicates a polarization beam splitter
- L1 indicates a laser light source for recording light that emits light having a wavelength of 532 nm
- L2 indicates a laser light source for reproducing light that emits light with a wavelength of 633 nm.
- PD1 and PD2 are photo diodes.
- a Nd: YVO crystal is excited by a diode.
- the two beams were crossed on the recording surface so that the angle between them was 50.00 degrees.
- the bisector of the angle formed by the two beams is perpendicular to the recording surface, and the vibration planes of the electric field vectors of the two beams obtained by the division intersect. Irradiation was performed so as to be perpendicular to the plane containing the book beam.
- the recording layers prepared in Examples 1 to 7 have a low moisture absorption rate and good compatibility.
- hologram recording of a volume hologram optical recording medium having these recording layers (i) whether recording can be performed immediately after sample preparation, (ii) whether recording can be written after moisture absorption (Shelf Life) (iii) Immediately after sample preparation, it was found that good holographic recording was achieved with both recording / reproduction availability (Archival Life) after moisture absorption.
- the volume hologram optical recording medium having the recording layer prepared in Comparative Examples 1 to 3 was able to record (i) hologram recording with or without recording / writing immediately after sample preparation, but (ii) sample moisture absorption It can be seen that the recording / reproduction characteristics were poor with regard to the possibility of subsequent recording / writing and (iii) the possibility of recording / reproducing after the moisture absorption of the written recording immediately after sample preparation.
- composition for forming a volume hologram recording layer to which the present invention is applied and the volume hologram recording material using the composition are preferably used for applications such as a volume hologram optical recording medium.
- FIG. 1 is a diagram showing an outline of an apparatus used for hologram recording.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Holo Graphy (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/440,131 US20100039685A1 (en) | 2006-09-05 | 2007-09-03 | Volume hologram optical recording medium, composition for forming volume hologram recording layer, volume hologram recording material, and volume hologram optical recording method |
| EP07806612A EP2063324B1 (en) | 2006-09-05 | 2007-09-03 | Volume hologram optical recording medium, composition for forming volume hologram recording layer, volume hologram recording material, and volume hologram optical recording method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-240368 | 2006-09-05 | ||
| JP2006240368 | 2006-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008029765A1 true WO2008029765A1 (en) | 2008-03-13 |
Family
ID=39157192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/067139 Ceased WO2008029765A1 (en) | 2006-09-05 | 2007-09-03 | Volume hologram optical recording medium, composition for forming volume hologram recording layer, volume hologram recording material, and volume hologram optical recording method |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20100039685A1 (ja) |
| EP (1) | EP2063324B1 (ja) |
| KR (1) | KR20090057363A (ja) |
| CN (1) | CN101501579A (ja) |
| TW (1) | TW200832395A (ja) |
| WO (1) | WO2008029765A1 (ja) |
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2007
- 2007-09-03 WO PCT/JP2007/067139 patent/WO2008029765A1/ja not_active Ceased
- 2007-09-03 KR KR1020097001320A patent/KR20090057363A/ko not_active Withdrawn
- 2007-09-03 US US12/440,131 patent/US20100039685A1/en not_active Abandoned
- 2007-09-03 CN CNA2007800300822A patent/CN101501579A/zh active Pending
- 2007-09-03 EP EP07806612A patent/EP2063324B1/en active Active
- 2007-09-05 TW TW096132979A patent/TW200832395A/zh unknown
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2172503A1 (de) | 2008-10-01 | 2010-04-07 | Bayer MaterialScience AG | Spezielle Polyetherbasierte Polyurethanformulierungen zur Herstellung holografischer Medien |
| EP2172502A1 (de) | 2008-10-01 | 2010-04-07 | Bayer MaterialScience AG | Polyetherbasierte Polyurethanformulierungen zur Herstellung holografischer Medien |
| US8361678B2 (en) | 2008-10-01 | 2013-01-29 | Bayer Materialscience Ag | Special polyether-based polyurethane formulations for the production of holographic media |
| WO2017104424A1 (ja) * | 2015-12-17 | 2017-06-22 | コニカミノルタ株式会社 | 体積ホログラム製造用感光性組成物、体積ホログラムの製造方法、体積ホログラム及びホログラフィック光学素子 |
| WO2024106374A1 (ja) * | 2022-11-14 | 2024-05-23 | 三菱ケミカル株式会社 | ホログラム記録媒体用硬化物の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2063324A4 (en) | 2011-01-12 |
| CN101501579A (zh) | 2009-08-05 |
| KR20090057363A (ko) | 2009-06-05 |
| EP2063324B1 (en) | 2012-03-21 |
| TW200832395A (en) | 2008-08-01 |
| US20100039685A1 (en) | 2010-02-18 |
| EP2063324A1 (en) | 2009-05-27 |
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