WO2007007436A1 - 体積位相型ホログラム記録材料、その製造方法および記録体 - Google Patents
体積位相型ホログラム記録材料、その製造方法および記録体 Download PDFInfo
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- WO2007007436A1 WO2007007436A1 PCT/JP2006/301536 JP2006301536W WO2007007436A1 WO 2007007436 A1 WO2007007436 A1 WO 2007007436A1 JP 2006301536 W JP2006301536 W JP 2006301536W WO 2007007436 A1 WO2007007436 A1 WO 2007007436A1
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- recording material
- hologram recording
- volume phase
- phase hologram
- polymerizable monomer
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- OTLDLKLSNZMTTA-UHFFFAOYSA-N octahydro-1h-4,7-methanoindene-1,5-diyldimethanol Chemical compound C1C2C3C(CO)CCC3C1C(CO)C2 OTLDLKLSNZMTTA-UHFFFAOYSA-N 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 125000005498 phthalate group Chemical class 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
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- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000012985 polymerization agent Substances 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- WVIICGIFSIBFOG-UHFFFAOYSA-N pyrylium Chemical class C1=CC=[O+]C=C1 WVIICGIFSIBFOG-UHFFFAOYSA-N 0.000 description 1
- 150000004053 quinones Chemical class 0.000 description 1
- 238000007342 radical addition reaction Methods 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- YYMBJDOZVAITBP-UHFFFAOYSA-N rubrene Chemical compound C1=CC=CC=C1C(C1=C(C=2C=CC=CC=2)C2=CC=CC=C2C(C=2C=CC=CC=2)=C11)=C(C=CC=C2)C2=C1C1=CC=CC=C1 YYMBJDOZVAITBP-UHFFFAOYSA-N 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052990 silicon hydride Inorganic materials 0.000 description 1
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- HJUGFYREWKUQJT-UHFFFAOYSA-N tetrabromomethane Chemical compound BrC(Br)(Br)Br HJUGFYREWKUQJT-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- OKYDCMQQLGECPI-UHFFFAOYSA-N thiopyrylium Chemical compound C1=CC=[S+]C=C1 OKYDCMQQLGECPI-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- RLGKSXCGHMXELQ-ZRDIBKRKSA-N trans-2-styrylquinoline Chemical compound C=1C=C2C=CC=CC2=NC=1\C=C\C1=CC=CC=C1 RLGKSXCGHMXELQ-ZRDIBKRKSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
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Classifications
-
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
- G03F7/001—Phase modulating patterns, e.g. refractive index patterns
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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, e.g. volume storage
Definitions
- volume phase hologram recording material manufacturing method thereof and recording body
- the present invention relates to a recording material suitable for recording a volume phase hologram or the like, a manufacturing method thereof, and a recording body for the recording / reproducing system.
- a hologram records interference fringes generated by interference of two coherent lights called information light and reference light on a photosensitive material, and the reference light and the reference light from the same direction as the reference light.
- a light beam having the same information as the information light is generated from the recorded photosensitive material, that is, reproduced.
- This hologram technology is applied to three-dimensional image display elements, optical elements, and the like in addition to stereoscopic holograms, and these are called holographic optical elements (HOE). Also, it is expected to be applied to the field of large-capacity memory for recording and reproducing digital information, that is, the field of holographic information recording.
- HOE holographic optical elements
- Holograms are classified into amplitude holograms and phase holograms according to the recording pattern of interference fringes.
- the hologram is also classified into a thin hologram and a thick hologram (volume hologram) depending on the thickness of the recording layer (see, for example, Non-Patent Document 1).
- volume phase holograms in which interference fringes are recorded in a relatively thick recording layer in the form of refractive index distribution or refractive index modulation, the so-called volume phase hologram has a third order due to its high diffraction efficiency and excellent wavelength selectivity. Used for applications such as former displays and HOE.
- Non-Patent Document 1 Conventional photosensitive materials for recording such volume phase holograms include silver halide silver and gelatin dichromate (DCG). (See, for example, Non-Patent Document 1). However, these methods are not suitable for industrial production of holograms because they require wet development and complicated current image fixing processing, and have the problem that images disappear due to moisture absorption after recording. It was.
- volume phase holograms In recent years, various photopolymer materials have been proposed as photosensitive materials for volume phase holograms. These do not require the complicated development process that was required when using conventional silver halide or DCG photosensitive materials, and volume phase holograms can be recorded only by a dry process, so that holograms are produced industrially. Useful to do.
- Photopolymer-based photosensitive compositions for producing volume phase holograms include photosensitive compositions mainly composed of a radical polymerization monomer, a binder polymer, a radical photopolymerization initiator, and a sensitizing dye.
- photosensitive compositions mainly composed of a radical polymerization monomer, a binder polymer, a radical photopolymerization initiator, and a sensitizing dye.
- There is a method using a difference in refractive index between a polymer of radical polymerization monomers and a binder polymer see, for example, Patent Document 1). That is, when the photosensitive composition formed into a film is exposed with interference light, the light of the interference fringes is strong, and radical polymerization is started on the part, accompanied by the radical polymerization monomer and the polymer.
- a concentration gradient occurs, and further, the radical transfer of the radical polymerization monomer occurs from the weak part to the strong part.
- the distribution between the radical polymerization monomer and the polymer can be made dense and recorded as a difference in refractive index.
- Patent Document 2 As a hologram recording material, a material system using both radical polymerization and cationic polymerization has been reported (for example, see Patent Document 2). This discloses a monomer having a diarylfluorene skeleton as a high refractive index radical polymerizable monomer and a system using a cationic polymerizable monomer having a refractive index smaller than that of the radical polymerizable monomer. In this system, the high refractive index component is polymerized by radical polymerization during hologram exposure, and then the image is fixed by cationic polymerization with fixing exposure. In addition, a material system utilizing cationic polymerization is also disclosed (for example, see Patent Document 3).
- the application of the photopolymerization technique as described above to the hologram is based on the concentration of the monomer and the polymer so as to correspond to the bright and dark portions of the interference fringes, that is, the spatial distribution of the light intensity of the interference fringes. This creates a spatial distribution (this creates a difference between the average refractive index where the monomer is polymerized and the refractive index elsewhere).
- This Photopolymer volume phase hologram recording material that records interference fringes as refractive index distribution or refractive index modulation is a complex development process that was necessary when using conventional silver salt photosensitive materials or dichromated gelatin.
- the volume phase hologram can be recorded only by the hologram exposure process. For this reason, the photopolymer-based volume phase hologram recording material can be sufficiently used as a recording material for stereoscopic image display such as a three-dimensional display.
- HIS holographic information storage
- Digital information expressed in a two-dimensional dot shape or lattice shape is a digital micromirror.
- the light is superimposed on the coherent information light by a spatial modulator (SLM) such as a (DMM), irradiated to the photosensitive material together with the coherent reference light, and recorded on a hologram.
- SLM spatial modulator
- DMM coherent reference light
- This reproduction is performed by irradiating the recording medium with reference light. That is, two-dimensional dot-shaped or grid-shaped digital information is read out by reference light and received by a charge coupled device (CCD) or a CMOS imaging device, and demodulated as digital information.
- CCD charge coupled device
- CMOS imaging device a charge coupled device
- the point of using an SLM or CMOS image sensor is different from the method of recording and reproducing stereoscopic images for three-dimensional displays, but basically both of them are used to record and reproduce specific optical images. It is the same.
- HIS high-density polystyrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-styrene-st-records several hundreds of holograms for the same recording site or the same recording volume.
- BER bit error rate
- SNR signal-to-noise ratio
- both HIS and 3D display stereoscopic image recording also record optical images.
- the quality of the recorded image that is, how much the BER and SNR can be maintained is important.
- the photopolymer-based volume phase hologram recording material has a large amount of light scattering due to the force recording material itself, which is a recording material suitable for HIS, in that no complicated post-processing such as DCG is required (for example, see Non-Patent Document 5). For this reason, photopolymer-based volume phase hologram recording materials simultaneously record noise due to light scattering during recording, thereby degrading BER and SNR, and noise is also multiplexed during multiple recording. Therefore, there was a limit to the ability of multiple recording.
- the photopolymer-based volume phase hologram recording material does not have a complicated post-processing step after recording as compared with the conventional DCG silver halide-based hologram recording material. In any respect, it is excellent as a recording material for industrial production. However, the quality of the recorded image was inferior compared to conventional DCG.
- the photopolymer-based volume phase hologram recording material utilizes a difference in refractive index between a polymer and a matrix generated from a polymerizable monomer after hologram recording.
- materials that can obtain a larger refractive index difference are combined.
- the compounding material and composition are carefully selected so that the material in the recording material does not undergo phase separation.
- there is a limit to such compatibility adjustment and there is a limit to lowering the noise level.
- Patent Document 1 Japanese Patent Laid-Open No. 02-3081
- Patent Document 2 Japanese Patent Laid-Open No. 05-107999
- Patent Document 3 Japanese Patent Publication No. 2001-523842
- Patent Document 4 Japanese Patent Application Laid-Open No. 11-352303
- Non-Patent Document 1 Toshihiro Kubota, “Introduction to Holography—Principle and Practice-”, Chapter 2 Types of Holodalms and How to Create Reconstructed Images ( P 21—43), Chapter 6 Recording Materials and Their Characteristics (p96 — 107) ”, Asakura Shoten, 1995
- Non-Patent Document 2 H. K. Coufal et al., “Holographic Data Storage”, Springer series in optical science, 2000.
- Non-Patent Document 3 G. T. Sincerbox, "Holographic Data Storage: History and Physical Principles J, Springer series in optical science, 2000. p3-20.
- Non-Patent Document 4 G. Barbastathis and 1 others, “Holographic Data Storage: Volume Holographic Multiplexing Methods J, Springer series in optical scie nce, 2000. p21— 62.
- Non-Patent Document 5 R. M. Shelby, “Holographic Data Storage: Media Requirements for Digital Holographic Data Storage J, Springer series in optical science, 2000. plOl— 111.
- An object of the present invention is to record and play back image information with excellent signal-to-noise ratio (SNR) characteristics indicating the bit error rate (BER) and the ratio of digital signal to noise.
- SNR signal-to-noise ratio
- a photopolymer-based volume phase hologram recording material suitable for applications such as graphic information recording, a method for producing the same, and a volume phase hologram recording body using the material. Means for solving the problem
- the present inventors have conducted various studies. As a result, in the holographic recording of data, the produced polymer polymerized by interference fringes caused by interference between information light and reference light The present invention was completed by discovering that recording with a weight average molecular weight of 1,000 to 3,000,000 can be recorded and reproduced in volume phase holograms with reduced noise.
- the weight average molecular weight of a polymer produced by interference fringes generated from information light and reference light is 1,000 to 3
- the present invention also provides a volume phase hologram recording material containing a chain transfer agent.
- the present invention also provides a volume phase hologram recording material comprising a polymer matrix, a polymerizable monomer, a photopolymerization initiator, and a chain transfer agent.
- This chain transfer agent is a volume phase hologram recording material which is a chain transfer agent for radical polymerization.
- the polymerizable monomer is polymerized by interference fringes generated from the information light and the reference light. Further, the produced polymer has a volume phase holographic recording material having a weight average molecular weight of 1,000 to 3,000,000.
- volume phase hologram recording material of the present invention By using the volume phase hologram recording material of the present invention, a low noise hologram can be recorded and reproduced. Further, by using the volume phase hologram recording material of the present invention, a recording body that requires higher quality recording characteristics than a normal hologram, such as holographic digital data recording, can be easily manufactured.
- the present invention is a volume phase hologram recording material containing a polymerizable monomer that can be photopolymerized by interference fringes generated from information light and reference light, the recording material comprising a polymer matrix, photopolymerization It contains an initiator and a chain transfer agent, and the content of the chain transfer agent is such that the weight average molecular weight of the polymer produced by photopolymerization can be controlled within the range of 1,000 to 3,000,000.
- the present invention also provides a volume phase type hologram recording material having a weight average molecular weight of 1,000 to 3,000, which is generated by polymerization of a polymerizable monomer by interference fringes generated from information light and reference light. , 000 volume phase hologram recording body.
- the present invention further provides a step of preparing a composition containing a polymer matrix, a polymerizable monomer, a photopolymerization initiator and a chain transfer agent, and interference fringes generated by information light and reference light in the composition. And a process for producing a polymer from the polymerizable monomer in the presence of the chain transfer agent.
- the method for producing a volume phase hologram recording material is provided.
- the volume phase hologram recording material containing the chain transfer agent of the present invention can record and reproduce information with low noise and high quality.
- the chain transfer agent in the present invention is a chain transfer agent for radical polymerization or a chain transfer agent for cationic polymerization.
- This chain transfer agent is one that pulls out radicals or cations from the growth terminal of the polymerization reaction and stops the growth terminal growth.
- the radical or cation transferred to the chain transfer agent becomes a new polymerization initiation species.
- the growth of a new polymer is started by adding to the polymerizable monomer. This process is called chain transfer of radical polymerization or cationic polymerization, and if the frequency of chain transfer is increased, the molecular weight of the produced polymer can be lowered.
- chain transfer agent in the present invention a degenerate chain transfer agent is preferred, and further, a radical polymerization agent is preferred.
- the present invention can control the molecular weight of the polymer produced from the polymerizable monomer in the volume phase hologram recording material, noise due to light scattering from the hologram recording material of the present invention is reduced, and higher resolution is achieved. Simple holograms can be recorded.
- the volume phase hologram recording material of the present invention can suppress the deterioration of recording more than that containing no chain transfer agent by irradiating light on the entire surface of the material after recording the hologram. That is, by irradiating the entire surface of the volume phase hologram recording material after hologram recording with light, it is possible to suppress further polymerization. Therefore, the volume phase hologram recording material of the present invention improves the storage stability of the medium after hologram recording.
- the volume phase hologram material of the present invention comprises a photopolymerization initiator that generates radicals or cations by light irradiation, a radical polymerizable monomer or a cationic polymerizable monomer (referred to as “polymerizable monomer”), and polymerization of the polymerizable monomer.
- the main component is a polymer matrix that is a field, and a chain transfer agent that controls the molecular weight of a polymer (referred to as a generated polymer) formed by polymerization of a polymerizable monomer.
- Examples of the polymerizable monomer in the present invention include a radical polymerizable monomer or a cationic polymerizable monomer, which is preferably an addition polymerizable monomer, and is preferably a radical polymerizable monomer.
- the polymerizable monomer in the present invention is preferably a monofunctional or polyfunctional polymerizable monomer, and more preferably a monofunctional polymerizable monomer.
- the polymerizable monomer in the present invention includes a monofunctional polymerizable monomer and a polyfunctional polymerizable monomer
- the total of the monofunctional polymerizable monomer and the polyfunctional polymerizable monomer is 100 parts
- the content of the polymerizable monomer is preferably 20 parts or less, more preferably 10 parts or less, and still more preferably 5 parts or less. And many When a functional polymerizable monomer is contained, 0.1 part or more is contained.
- Examples of the polymerizable monomer of the present invention include (meth) acrylates, (meth) acrylamides, styrenes, substituted styrenes, vinyl monomers, and urnaphthalenes having an ethylenic double bond capable of radical polymerization. And substituted urnaphthalenes are preferred. Of these, (meth) acrylates are more preferred for the present invention because of their high polymerization rates.
- (Meth) acrylate refers to acrylic acid ester and Z or methacrylic acid ester, and (meth) acrylamide and the like are the same.
- Specific polymerizable monomers in the present invention include methyl, ethyl, propyl, isopropinole, n-butinole, sec butinole, tert-butinole, pentinole, neopentinole, hexyl, heptyl, octyl, nonyl, dodecyl, 2- Chain, branched or cyclic such as methylbutyl, 3-methylbutyl, 2-ethylbutyl, 1,3 dimethylbutyl, 2-ethylhexyl, 2-methylpentyl, cyclohexyl, adamantyl, isobornyl, dicyclopentayl, tetrahydrofuryl Alkyl alcohol (meth) acrylates; 2-hydroxyethyl (meth) acrylates and 2-hydroxypropyl (meth) acrylates such as hydroxyalkyl (meth) acrylates; phenol, 4-methoxycarbo
- Atalylates containing iron atoms such as ferrocelemethyl, fuececeletil; trifluoroethyl, tetrafluoropropyl, heptadecafluorodecyl, octafluoropentyl 2, (3) (meth) atalylates containing a halogen atom such as dibromopropyl; (meth) atalylates containing a key atom such as trimethoxysilylpropyl; glycidyl attalylate or glycidyl metatalylate (Meth) atalylates containing any epoxy group; containing amino groups such as N, N dimethylaminoethyl, N, N-jetylaminoethyl, N-tert butylaminoethyl ) Atalylates; ethylene glycol, methoxyethylene glycol, diethylene glycol, triethylene glycol
- specific polymerizable monomers in the present invention include (meth) acrylamides such as acrylamide, N-methylacrylamide, N, N dimethylacrylamide; styrene, 4-bromostyrene, perfluorostyrene, a-Styrenes such as methylstyrene and vinyltoluene; butadiene, isoprene, acrylonitrile, vinyl acetate, vinyl chloride, vinylidene chloride, N vinylpyrrolidone, N bullcarbazole, bullpyridine, bull pyrrolidine, maleic anhydride, diallyl Examples include butyl monomers such as phthalates.
- the difference in refractive index between the polymer matrix and the polymerizable monomer is preferably 0.001 or more, more preferably 0.0003 or more, and 0.005 or more. More preferably it is.
- the difference is preferably 0.03 or less, more preferably 0.02 or less, and further preferably 0.01 or less. If the difference exceeds 0.03, the balance between the polymer matrix and the polymerizable monomer in the recording material may be lost, which is not preferable. Also, if the difference is less than 0.0001, the refractive index modulation is bad and the BER may be large, which is not preferable.
- the refractive index is measured at 25 ° C., preferably measured at the same wavelength as the reference light.
- the molecular weight of the polymerizable monomer is high, diffusion in the polymer matrix may be suppressed and the reaction rate may be reduced. From this, the molecular weight is preferably 1,000 or less, more preferably 800 or less, and still more preferably 600 or less.
- Polymerizable monomers used in the present invention include phenol (meth) acrylate, tribromophenol (meth) acrylate, dibromophenol (meth) acrylate, monobromophenol (meth) acrylate, and phenol.
- phenol (meth) acrylate tribromophenol (meth) acrylate, dibromophenol (meth) acrylate, monobromophenol (meth) acrylate, and phenol.
- Atarylate tribromophenol (meth) acrylate, dibromophenol (meth) acrylate, monobromophenol (meth) acrylate, methanol (meth) acrylate, tamphenol (meth) acrylate
- dibromophenol (meth) acrylate dibromophenol (meth) acrylate
- monobromophenol (meth) acrylate methanol (meth) acrylate
- tamphenol (meth) acrylate tamphenol (meth) acrylate
- a photopolymerization initiator that generates radicals by irradiation with light of 350 to 700 nm or a photopolymerization initiator that generates cations can be used, and radicals are preferably generated. It is a photopolymerization initiator.
- a sensitizer for increasing the generation of radicals with a photoinitiator power by light irradiation can be used together, and it is preferable to use it together.
- photopolymerization initiator used in the present invention include benzoin such as benzoin, benzoin methyl ether, and benzoin propyl ether; acetophenone, 2,2-dimethoxy-2-ferulacetophenone, 2, 2-diethoxy-1-2-phenolacetophenone, 1,1-dichloroacetophenone, 1-hydroxycyclohexyl phenyl ketone, 2-methyl 1 [4 (methylthio) phenol] 2 morpholinopropane 1 Acetophenone such as ON and N, N dimethylaminoacetophenone; Anthraquinone such as 2-methylanthraquinone, 1-black anthraquinone and 2-amylanthraquinone; 2, 4 dimethyl thixanthone, 2, 4 jetylthioxanthone, 2 And thixanes such as 2,4-diisopropylthioxanthone Ketals such as acetophenone dimethyl
- photopolymerization initiator used in the present invention a photopolymerization initiator that is sensitive to the wavelength of light used for hologram recording is appropriately selected and used.
- the photopolymerization initiators may be used alone or in combination of two or more.
- the photopolymerization initiator absorbs the wavelength and is combined with the photopolymerization initiator.
- Dyes that can generate radicals in the initiator can be used together as an initiator assistant. Such dyes are widely known as sensitizers or sensitizing dyes.
- sensitizing dye used in the present invention xanthene, thixanthene, cyanine, merosyanine, coumarin, ketocoumarin, eosin, erythemacin, titanocene, naphthacene, thiopyrylium, quinoline, styrylquinoline, oxonol, cynin, Examples thereof include rhodamine, pyrylium compounds, 5, 12 bis (feuleche) naphthacene, and rubrene.
- a volume phase hologram recording body uses a sensitizing dye having absorption in the information readout light region and high transparency is required, it is preferable that the recording becomes colorless after the hologram recording is completed.
- This colorlessness is preferably caused by heating or ultraviolet irradiation.
- the polymer matrix of the present invention includes a photopolymerization initiator, a polymerizable monomer, and a chain transfer. It holds the photopolymerization type such as a moving agent.
- the polymer matrix may contain such a material as long as it does not inhibit photopolymerization and is within a range.
- the polymer matrix of the present invention is preferably transparent in the wavelength region of light used for hologram recording and reproduction.
- the recorded hologram has such shape stability that it is not destroyed.
- the polymer matrix materials that can be used in the present invention are roughly classified into two types depending on the properties of the polymer.
- One is a non-crosslinked polymer matrix that uses a non-crosslinked polymer such as linear, branched, or comb as a material, and the other is a crosslinked type in which polymer chains are crosslinked at multiple locations. This is a cross-linked polymer matrix using a polymer.
- Materials of the polymer matrix used in the present invention include acrylate and alpha monoalkyl acrylate esters and acidic polymers and interpolymers such as polymethyl methacrylate and polyethyl methacrylate; Vinyl acetate, polyacetic acid Z vinyl acrylate, polyacetic acid Z vinyl methacrylate and hydrolyzable polyvinyl acetates; ethylene Z vinyl acetate copolymers; saturated and unsaturated polyurethanes (urethane polymers); butadiene and isoprene Polymers and copolymers and high molecular weights of polyglycols having an average molecular weight of approximately 4,000 to 1,000,000 Polyacids ethylenes; epoxy compounds, for example, epoxidized compounds having acrylate or metatalylate groups Class: Polyamide, for example N-methoxymethylpolyhexamethylene adipamides; cellulose esters such as cellulose acetate, cellulose acetate succinate and cellulose acetate butyrate
- the polymer matrix material used in the present invention includes cationic epoxy polymerization, cationic butyl ether polymerization, cationic alkenyl ether polymerization, cationic allene ether polymerization, cationic ketene acetal polymerization, epoxy-amine addition polymerization, Epoxy-thiol addition polymerization, unsaturated ester-amine addition polymerization (according to Michael addition), Saturated ester-thiol addition polymerization (according to Michael addition), Bulle-silicon hydride addition polymerization (hydrosilylation), isocyanate monohydroxyl addition polymerization (urethane formation), isocyanate-thiol addition polymerization and isocyanate-amine addition polymerization (urea) Formation) Isometric force.
- This reaction is enabled or facilitated by a suitable catalyst.
- a suitable catalyst for example, cationic epoxy polymerization is promoted by using a BF-based catalyst, and other cationic heavys.
- isocyanate hydroxy addition polymer isocyanate thiol addition polymer, epoxy monothiol addition polymer, etc. are preferred as the polymer matrix used in the present invention. Moreover, it is.
- the polymer matrix is isocyanate monohydroxyl addition polymerization (urethan formation) and the polymerizable monomer is (meth) acrylate.
- the polymer matrix is an amorphous polyester and the polymerizable monomer is a (meth) acrylate.
- Xinolemethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and the like, and bullets, isocyanurates, adducts, and prepolymers of these isocyanates are also included.
- low molecular weight polyol examples include ethylene glycol, propylene glycol, cyclohexane dimethanol, 3-methyl-1,5-pentanediol, glycerin, and trimethylolpropane. These ethylene oxide modified products or propylene oxide A modified body etc. are also mentioned.
- Polyether polyols include polyethylene glycol and polypropylene glycol
- Polyester polyols include ethylene glycol, propylene glycol, cyclohexanedimethanol and 3-methyl-1,5-pentanediol and dibasic acids such as adipic acid, succinic acid, phthalic acid, hexahydrophthalic acid and terephthalic acid.
- a reaction product with an acid component such as an acid or an acid anhydride thereof may be mentioned.
- an isocyanate-hydroxy addition polymer is used in the present invention
- an ethylenically unsaturated double bond polymerizable with a photopolymerizable monomer can be introduced into the matrix. That is, as a material that can be used for introduction, a compound having both a hydroxy group and a reactive group, a compound having both an isocyanate group and a reactive group, or the like can be used.
- Examples of the (meth) acrylate having the hydroxy group include an adduct of an epoxy compound called epoxy (meth) acrylate and (meth) acrylic acid.
- adducts include (poly) ethylene glycol, (poly) propylene glycol, trimethylolpropane, and polyglycidyl ethers of polyols such as glycerin with (meth) acrylic acid attached; bisphenol A type epoxy resin And (meth) acrylate of phenol or cresol novolac type epoxy resin.
- a method can be selected in which a polyene monomer is allowed to coexist and a thiol group remaining after curing and the polyene are subjected to radical addition polymerization.
- thiolic compounds include thioglycolic acid derivatives and mercaptopropionic acid derivatives in addition to simple thiols.
- Simple thiols include o-, m- or p-xylenedithiol.
- Examples of the thioglycolic acid derivative include ethylene glycol bisthioglycolate, butanediol bisthioglycolate, and hexanediol bisthioglycolate.
- Examples of mercaptopropionic acid derivatives include ethylene glycol bisthiopropionate, butanedioleobisthiopropionate, trimethylolpropane tristhiopropionate, pentaerythritol tetrakisthiopropionate, and trihydroxyethyl lysocyanur. Examples include acid tristipropionate.
- Examples of the epoxy compound used for the epoxy-thiol addition polymer include polyglycidyl ethers of polyols such as (poly) ethylene glycol, (poly) propylene glycol, trimethylolpropane, and glycerin, alicyclic Examples thereof include epoxy, bisphenol A type epoxy resin and phenol or cresol novolac type epoxy resin.
- any chain transfer agent can be used as long as it can adjust the polymerization degree of the produced polymer.
- chain transfer agents include tertiary amines, alkyl thiols having about 1 to 20 carbon atoms, disubstituted allyls, tert-butyl sulfides, disulfide compounds, dithiobenzoic acid Tamyls, carbon tetrachloride and tetrabromide.
- Alkyl halides such as carbon, triethylaluminum, redox catalysts containing metal ions, AIBNs, azo compounds, N aryle maleimides, cobalt complexes of hemapolyphylline tetramethyl ether, the following formula (1)
- an addition-cleavage chain transfer agent represented by the formula: quinones, nitro'nitroso compounds, and styrene derivatives.
- Y represents COOR and cyano group
- R represents carbon number 1
- X represents a bromo atom, SR, SnR, SO Ar
- R represents an alkyl group having 1 to 6 carbon atoms
- R represents an alkyl group having 1 to 6 carbon atoms
- Ar represents an aryl group.
- tertiary amines include triethylamine, tributylamine, N, N jetylbutyramine, N, N jetylamine, N, N diisopropylethylamine, N, N diisopropylisobutylamine, N , N Diisopropyl 1-ethyl propi Trialkylamines such as ruamine, N, N diisopropyl 2-ethylbutylamine, N-methyldicyclohexylamine, N ethyldicyclohexylamine, and N, N jetylamine; N, N dimethylethanolamine, N —Hydroxyl-containing trialkylamines such as methylethanolamine and triethanolamine; and N, N-dimethylbenzylamine, N, N-deethylbenzylamine, methyldimethylaminobenzoate, and tribenzylamine. And arylamine. Examples of the s
- thiols examples include 1-butanethiol and ⁇ -dodecyl mercaptan.
- tertiary amines, thiols, styrene derivatives and the like are more preferable. Tertiary amines and styrene derivatives and the like more preferable are particularly preferable.
- the tertiary amine is a low molecule having a molecular weight of 50 to 250, and preferably has no reactive group such as ⁇ , ⁇ and SH.
- the volume phase hologram recording material may or may not contain a plasticizer. However, it is preferable that the volume phase hologram recording material can suppress distortion of the volume phase hologram recording body.
- the plasticizer include dioctyl adipate, acetyl citrate tributyrate, and the like, which are preferred as plasticizers to be added to the synthetic resin.
- the content of the plasticizer is preferably 15 parts by weight or less, more preferably 5 parts by weight or less, with respect to 100 parts by weight of the polymer matrix. If the plasticizer content exceeds 30 parts by weight, the S / N ratio of the hologram recording may be deteriorated because the volume phase hologram recording material may be soft and strong.
- the content is preferably 0.1 parts by weight or more, more preferably 0.5 parts by weight or more.
- composition of volume phase hologram recording material polymer matrix and polymerizable monomer
- the total of the polymer matrix and the polymerizable monomer is 100 parts by weight, and the polymerizable monomer is preferably 1 to 50 parts by weight, more preferably 5 to 40 parts by weight. Preferred is 10 to 30 parts by weight.
- This polymerizable monomer is If it is less than 1 part by weight, the SNR of the hologram recording may be deteriorated because the polymerization amount due to light irradiation for hologram recording is small. If the polymerizable monomer exceeds 50 parts by weight, the amount of polymerization due to light irradiation for hologram recording increases, and the SNR of hologram recording may deteriorate.
- composition of volume phase hologram recording material polymerizable monomer and photopolymerization initiator
- composition of the polymerizable monomer and the photopolymerization initiator in the volume phase hologram recording material of the present invention is such that when the polymerizable monomer is 100 parts by weight, the photopolymerization initiator is 0.1 to 20 parts by weight. 0.3 to 10 parts by weight is more preferred, and 0.5 to 5 parts by weight is still more preferred.
- composition of volume phase hologram recording material content of chain transfer agent
- the content of the chain transfer agent in the volume phase hologram recording material of the present invention varies depending on the type of chain transfer agent, and the optimum amount varies. That is, the content of the chain transfer agent in the volume phase hologram recording material of the present invention can be adjusted by the chain transfer constant of the chain transfer agent used.
- the content of this chain transfer agent is, for example, preferably 0.05 to 40 parts by weight, more preferably 0.1 to 30 parts by weight, preferably 0.2 to 20 parts by weight, based on 100 parts by weight of the polymerizable monomer. Is more preferable. If this content is less than 0.05 parts by weight, the polymerization control becomes insufficient, resulting in a high molecular weight, which may deteriorate the SNR of hologram recording. On the other hand, if the content force exceeds 0 part by weight, the polymerization may not proceed sufficiently, resulting in a low molecular weight, and the SNR of the hologram recording may deteriorate.
- the weight average molecular weight of the product polymer 3 X 10 6 or less preferably tool 2. 8 X 10 6 or less and more preferably tool 1 X 10 6 or less and still more preferably tool 5 X 10 5 or less is particularly preferred.
- the weight average molecular weight of the produced polymer is preferably 1,000 or more, more preferably 1,500 or more, more preferably 2,000 or more, and even more preferably 5,000 or more.
- the SNR of hologram recording may be deteriorated, which is not preferable. Further, if the weight average molecular weight of the produced polymer is less than 1,000, it is not preferable because the SNR of hologram recording may deteriorate.
- the content of the chain transfer agent in the volume phase hologram recording material may be adjusted in order to limit the molecular weight of the produced polymer as described above.
- the lower limit molecular weight of the produced polymer described above may not match.
- the degree of polymerization may be defined by the molecular weight of the produced polymer. That is, the polymer produced is more preferably a pentamer or more, more preferably a tetrimer or more, more preferably a trimer or more.
- the generated polymer exists in the form of particles.
- the amount of irradiation and the amount of polymerizable monomer required for recording can be reduced as compared with the existing hologram recording body in which the produced polymer is present in a band shape.
- the recording area can be made smaller than the existing one. From this, the volume phase hologram recording material of the present invention can record information at high density.
- the volume phase hologram recording material of the present invention may be manufactured by any method as long as the hologram can be recorded and read out.
- the volume phase hologram recording material of the present invention may be applied to a transparent plate with hologram recording light / reading light and guide light, or may be poured between the two transparent plates, or in a sheet form.
- the volume phase hologram recording material may be sandwiched between the two transparent plates.
- the hologram recording light / reading light and guide light used in the volume phase hologram recording body of the present invention are made of glass, polycarbonate, polyethylene, polypropylene, polyvinyl chloride, polyvinyl chloride, polystyrene. , Polyacrylate, polymethacrylate and the like. Two types of the plates may be used. That is, the volume phase hologram recording material of the present invention can be applied to a glass plate, poured, or placed on a sheet, and then produced using a sheet of polycarbonate or polypropylene. At this time, a recording medium can be prepared to a desired thickness by inserting a spacer between the plates. This spacer can also be used as a seal for the recording medium.
- the thickness of the recording layer in the volume phase hologram recording body of the present invention is preferably 5 to 5,000 ⁇ m force S, more preferably 20 to 3,000 / zm force, and more preferably 100 to 1,000 m force ⁇ Even better!
- the recording layer contains the volume phase hologram recording material of the present invention. . If the thickness of the recording layer is less than 5 ⁇ m, the SNR of the hologram recording may be deteriorated. This is not preferable, and if it exceeds 5,000 m, the recording layer is distorted and the SNR of the hologram recording is deteriorated. Is not preferable.
- Hologram recording can be performed by irradiating light of 350 to 700 nm.
- the irradiation light include a GaN-based semiconductor blue laser, an argon ion laser, a krypton ion laser, and a YAG laser.
- the volume phase hologram recording material of the present invention has a reference beam and an information beam arranged on the same optical axis !, a polarization collinear hologram recording method, and a two-beam type that can vary the incident angle of the reference beam It can be used for any hologram recording method such as a hologram recording method.
- the volume phase hologram recording material of the present invention can be preferably used for a collinear hologram recording method and a reference light incident angle variable hologram recording method, and more preferably a polarization collinear hologram recording method.
- the volume phase hologram recording material of the present invention can be used for optical elements, display / design impartment, interference measurement, optical information processing, optical information recording, and the like.
- optical element examples include a diffraction grating, a POS scanner, a CD'DVD player optical head, a beam splitter, an interference filter, and an aircraft's automotive head-up display.
- Display ⁇ Design examples include holographic art, interior / exterior decorations, art and craft records, educational materials, books, magazine covers and illustrations, securities 'ID cards' ⁇ Decoration and anti-counterfeiting of telephone cards, etc., and standing vision of CT images.
- interference measurement include measurement of object displacement and deformation, measurement of object vibration, and measurement of optical surface accuracy (computer hologram).
- a pattern using a holographic 'matched filter' Recognition As a specific example of optical information processing, a pattern using a holographic 'matched filter' Recognition, fingerprint verification, and the like.
- optical information recording examples include (high-definition or digital) television broadcasting, video camera video, surveillance camera video image recording, information retrieval recording, graphic character input device, holographic associative memory, and the like.
- a volume phase hologram recording material comprising a chain transfer agent in holographic recording of data using information light and reference light.
- a volume phase hologram recording material in which a difference in refractive index between a polymer matrix and a polymerizable monomer is 0.0001 or more.
- Volume phase hologram recording material of 001 or higher.
- glycerin propylene oxide modified product G-400, G-400 manufactured by Asahi Denki Co., Ltd., molecular weight of about 400
- HDI hexamethylene diisocyanate
- DBTL dibutyltin dilaurate
- DBPA 2,4-dibromophenol-rutalylate
- Irgacure784 Irg784, manufactured by Ciba Specialty Chemicals
- DMBnA N-dimethylbenzylamine
- a sample cell was prepared by attaching a tape of trifluoroethylene polytetrafluoroethylene and further attaching a glass substrate (50 X 50 X lmm) with an aluminum vapor deposition layer (reflection layer).
- the composition prepared above was injected into the cell, heated at 80 ° C. for 2 hours to cure the matrix, and recording medium A was prepared.
- the recording medium 1 was set in the holder so that the laser irradiation during recording and reproduction was performed in the upward direction in Fig. 1, and the position was adjusted so that the aluminum vapor deposition layer (reflection layer) would focus. Reading was performed 30 seconds after writing, and the error rate (BER, bit error rate) during data recording was measured. The results are shown in Table 1.
- the standard information pattern (about 1600 bytes test information pattern) was used.
- Reading laser intensity 0.75mW ⁇ .lmW
- Example 1 instead of DMBnA in Example 1, use 0.4 parts of 2,4-diphenyl 4-methyl-1-pentene (MSD, NOFMER MSD manufactured by NOF Corporation) and 2.5 parts of Irg784. A recording medium B was manufactured in the same manner as described above. And this BER was measured. The results are shown in Table 1.
- Example 1 The same procedure was followed except that DMBnA was removed from the composition prepared in Example 1, and a comparison was made. Recording medium A was produced. Using this comparative recording medium A, the error rate during data recording was measured under the data recording conditions and data reading conditions described in Example 1. I put these results on the table and have 7 pieces.
- the comparative recording medium A showed a BER deterioration, but the recording medium of the present invention did not show such a BER deterioration. Even when the reproduced image on the recording medium A (FIG. 2) and the reproduced image on the comparative recording medium A (FIG. 3) were compared, the reproduced image on the recording medium A showed no distortion or blurring.
- amorphous polyester (Byron 550, Toyobo Byron 650), 11 parts of DBPA, 1.6 parts of Irg784, 2 parts of n-dodecyl mercaptan (DM, manufactured by Aldrich) as chain transfer agent,
- DM n-dodecyl mercaptan
- the mixture was mixed well at room temperature of 25 ° C for 30 minutes to obtain a uniform solution.
- the mixed solution was put into a vacuum dryer, and toluene was removed under reduced pressure at 25 ° C and 13.3 kPa.
- a tough recording medium composition C was prepared.
- a substrate was prepared by attaching a polytetrafluoroethylene polytetrafluoroethylene tape having a thickness of 500 ⁇ m as a spacer to the four ends of a glass substrate (50 ⁇ 50 ⁇ 1 mm).
- the substrate was placed horizontally, and 2 g of composition C was placed in the center. Cover this with a glass substrate (50 X 50 X lmm) with an aluminum deposition layer (reflective layer), cover it, place it in a press machine heated to 80 ° C, and gradually pressurize it over 20 minutes.
- Composition C was spread in the substrate.
- recording medium C was manufactured by pressing for 1 hour at a pressure of lOkgZcm 2 .
- the BER during data recording was measured under the data recording conditions and data reading conditions described in Example 1. The results are shown in Table 2.
- the recording medium was operated in the same manner as in Example 3 except that 0.5 parts of MSD was used instead of DM. D was produced. And under the data recording conditions and data reading conditions described in Example 1.
- Example 2 The same procedure as in Example 3 was repeated except that DM was omitted from composition C prepared in Example 3. Comparative recording medium C was produced. Using this comparative recording medium C, the BER at the time of data recording was measured under the data recording conditions and data reading conditions described in Example 1. The results are shown in Table 2.
- a uniform master batch was prepared by holding 5 cm DBPA and 2.5 cm Irg784 at 30-40 ° C for about 2 hours.
- composition prepared above in an aluminum (A1) pan for a differential scanning calorimeter with a UV lamp with a diameter of 5 mm and a depth of 3 mm (hereinafter Photo-DSC equipment, Seiko Instruments Inc., DSC229C-UV1) 5 mg of 1 was collected, set in a Photo-DSC apparatus, and irradiated with light (irradiation amount: 16jZcm 2 ) at 30 ° C in a nitrogen atmosphere.
- This light irradiation is performed by attaching a bandpass filter with a center wavelength of 500 nm and a half-value width of 50 nm and an optical filter that cuts below 480 nm to the UV lamp device of the Photo-DSC device to produce a monochromatic light of 500 nm.
- irradiation light intensity in the set position is obtained by adjusting the 4. 5mWZcm 2.
- the sample after irradiation with light is also removed from A1 bread, dissolved in 2 ml of tetrahydrofuran (THF) solution, filtered through a 0.45 m membrane filter, and subjected to gel permeation chromatography (GPC: Tosoh HLC-8120GPC). Their weight average molecular weight (Mw, Measurement was made in terms of polystyrene. The results are shown in Table 3. I have made 100 GPC measurement conditions.
- a recording medium composition 2 was prepared in the same manner as in Example 5 except that N, N diisopropyl 1-ethylpropylamine (DiPEPA) was used as the chain transfer agent. In the same manner as in Example 5, this was irradiated with light, and the molecular weight of the produced polymer was measured. The results are shown in Table 3.
- a recording medium composition 3 was produced in the same manner as in Example 5 except that DMBnA was used as the chain transfer agent. In the same manner as in Example 5, this was irradiated with light, and the molecular weight of the produced polymer was measured. The results are shown in Table 3.
- a recording medium composition 4 was produced in the same manner as in Example 5 except that MSD was used as the chain transfer agent. In the same manner as in Example 5, this was irradiated with light, and the molecular weight of the produced polymer was measured. The results are shown in Table 3.
- a recording medium composition 5 was produced in the same manner as in Example 5 except that DM was used as the chain transfer agent. In the same manner as in Example 5, this was irradiated with light, and the molecular weight of the produced polymer was measured. The results are shown in Table 3.
- a recording medium composition 6 was prepared in the same manner as in Example 5 except that N, N jetylbenzylamine (DEBnA) was used as the chain transfer agent. In the same manner as in Example 5, this was irradiated with light, and the molecular weight of the produced polymer was measured. The results are shown in Table 3. [0079] ⁇ Comparative Example 3>
- the master batch prepared in Example 5 was used as it was. That is, this master batch was used as comparative recording medium composition 1.
- the comparative recording medium composition 1 was irradiated with light in the same manner as in Example 5 to measure the molecular weight of the produced polymer. The results are shown in Table 3.
- the weight average molecular weight of the composition for a recording medium in which a chain transfer agent is added to the comparative recording medium composition 1 is reduced by one digit or more, and the molecular weight can be controlled. Showed that.
- the three-dimensional shape of the polymer that is, the particle size
- a is a proportional constant 7 . 6 X 10- 22 m
- X represents a coefficient by molecular shape
- JP Cotton et al, Macromolecules, Vol. 7, 863-872, 1974.
- x (Calculated by 0.6).
- Example 11 Except that DEBnA was used in place of DMBnA, the same operation as in Example 11 was performed to prepare recording media 10 to: L1, and the BER and the molecular weight of the produced polymer were measured. The results are shown in Table 4.
- Recording media 12 to 16 were produced in the same manner as in Example 11 except that DiPEA was used instead of DMBnA, and the molecular weights of these BERs and produced polymers were measured. These results are shown in Table 4.
- the recording medium was operated in the same manner as in Example 11 except that MSD was used instead of DMBnA.
- a comparative recording medium 2 was prepared in the same manner as in Example 11 except that no chain transfer agent was added, and the BER and the molecular weight of the produced polymer were measured. The results are shown in Table 4.
- volume phase hologram recording material of the present invention By using the volume phase hologram recording material of the present invention, a hologram can be recorded and reproduced with low noise. Further, by using the volume phase hologram recording material of the present invention, a recording medium that requires higher quality recording characteristics than ordinary holograms, such as holographic digital data recording, can be easily manufactured.
- FIG. 1 Conceptual diagram of a hologram recording cell enclosing a volume phase hologram recording material
- FIG. 2 Reproduced image of recording medium A
- Fig. 1 Substrate 1 (eg glass)
- FIG. 1 2 Substrate 2 (eg glass)
- Fig. 6-6 Volume phase hologram recording material
Abstract
Description
Claims
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US11/994,603 US20090087753A1 (en) | 2005-07-11 | 2006-01-31 | Volume phase hologram recording material, production process therefor, and recorded material |
JP2007524516A JPWO2007007436A1 (ja) | 2005-07-11 | 2006-01-31 | 体積位相型ホログラム記録材料、その製造方法および記録体 |
EP06712679A EP1906265A4 (en) | 2005-07-11 | 2006-01-31 | VOLUME PHASE HOLOGRAM MEASUREMENT MATERIAL, MANUFACTURING PROCESS THEREFOR AND RECORDED MATERIAL |
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WO2014030711A1 (ja) | 2012-08-24 | 2014-02-27 | 大日本印刷株式会社 | 体積型ホログラム記録用感光性組成物、体積型ホログラム記録用感光性基板、及び、体積型ホログラム記録体 |
US9709952B2 (en) | 2012-08-24 | 2017-07-18 | Dai Nippon Printing Co., Ltd. | Photosensitive composition for volume hologram recording, photosensitive substrate for volume hologram recording, and volume hologram recorded medium |
Also Published As
Publication number | Publication date |
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JPWO2007007436A1 (ja) | 2009-01-29 |
EP1906265A4 (en) | 2010-07-28 |
KR20080028916A (ko) | 2008-04-02 |
TW200702954A (en) | 2007-01-16 |
US20090087753A1 (en) | 2009-04-02 |
EP1906265A1 (en) | 2008-04-02 |
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