JP3287486B2 - Hologram duplication method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hologram duplication method.

[0002]

2. Description of the Related Art A hologram master and a photosensitive material are brought into close contact with each other, and a laser beam is irradiated to cause the diffracted light and the incident light of the master to interfere in the photosensitive material. A hologram image of the master is recorded in the photosensitive material and copied. That is being done. In this case, in order to prevent the image from being disturbed by the back reflection component, an optical contact liquid having a refractive index substantially equal between the original plate and the photosensitive material is interposed, and the hologram image is copied by improving the adhesion and preventing the back reflection. I am trying to do it.

[0003]

Incidentally, the optical contact liquid interposed between the hologram master and the photosensitive material is a liquid that has been drooled, and does not have a uniform thickness due to its fluidity, unevenness of thickness, vibration, etc. When the amount of the contact liquid is large, there is a problem that the hologram cannot be copied due to the flow. Also, even if the hologram is copied in a clean room, dust of 10 μm or less may be mixed. If the copy is performed while dust is mixed, the flow of the optical adhesion liquid around the dust and the film of There has been a problem that duplication is hindered by the lifting.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a hologram duplication method in which an optical contact liquid is made uniform and thin, and a hologram can be duplicated without causing a hindrance to duplication even if dust is mixed therein. The aim is to provide a method.

[0005]

FIG. 1 shows a case in which ND glass having an anti-reflection (AR) coat having flexibility is used. The original support glass 3 is brought into close contact with the AR coated ND glass 1 via the optical contact liquid 2,
The original film 4 is supported, and the original protective glass 6 is adhered with an optical adhesive 5 to form an original portion. The cushioning layer 16 and the optical contact liquid 7 are interposed in the original plate, and the photosensitive material film 8 for duplication, the optical contact liquid 9 and the cushion layer 1
5. The ND glass 13 with the AR coating is overlapped to form a portion to be copied. Thus, the present invention provides an ND with an AR coat.
An adhesive cushion layer 15 is provided on the inner surface side of the glass 13, and a cushion layer 16 is provided on the original protective glass 6 on the optical contact liquid side.
The cushion layers 15 and 16 are made of gelatin for photography, casein used for semiconductors, a sticky polymer material, etc., and the cushion layers uniformly act on the optical contact liquid. As a result, the optical contact liquid can be made uniform and thin, and even if dust is mixed in, it can be embraced inside, preventing the flow of the contact liquid and the lifting of the film due to the dust, and duplication can be performed without any trouble. The same effect can be obtained by providing a similar cushion layer on the upper surface of the photosensitive material film instead of the cushion layer 15 and on the lower surface of the photosensitive material film instead of the cushion layer 16.

Various kinds of cushion layers can be used as follows. The cushion layer is a binder polymer or a polymer layer composed of a binder polymer containing a plasticizer.As a binder polymer, a natural polymer is a protein, such as albumin, globulin, casein, collagen,
Gelatin, elastin, keratin, fibroin, and other polysaccharides, agar (agarose, agaropectin), alginic acid, chitin, chitosan, cellulose, starch,
Natural rubbers such as lignin;

[0007] Of these, particularly preferred are:
Examples include casein, gelatin, and natural rubber, which have excellent optical properties and coating properties.

As synthetic polymers, acrylate-styrene-acrylonitrile (AAS) copolymer, acrylonitrile-butadiene-styrene (ABS) copolymer, chlorinated polyethylene-acrylonitrile-styrene (AC)
S) Copolymer, acrylate copolymer, olefin-vinyl alcohol copolymer, alkyd resin, amino resin, bismaleimide-triazine resin, cellulose acetate (CA), cellulose butyrate acetate (CAB), ethyl cellulose (EC) , Hydroxyethylcellulose, carboxymethylated cellulose, chlorinated polyether, coumarone resin, chlorinated polyethylene, allyl resin, ethylene-
α-olefin copolymer, ethylene-vinyl acetate copolymer (EVA), ethylene-vinyl chloride copolymer, ethylene-vinyl acetate-vinyl chloride copolymer, epoxy resin,
Furan resin, fluorine resin, ionomer, ketone resin,
Methacrylate-butadiene-styrene (MBS) copolymer, methacryl-styrene copolymer, nitrile resin,
Oxybenzoyl polyester, petroleum resin, phenolic resin, polyacetal, polyamide, polyamide imide, polyarylate, polyallyl sulfone, polybutadiene, thermosetting polybutadiene, polybutylene, polybutylene terephthalate, polycarbonate, polyether sulfone, polyethylene, water-crosslinkable polyethylene, Polyethylene terephthalate, polyimide, polyamino bismaleimide, methacrylic resin (PMMA), polymethylpentene, polypropylene, polyphenylene oxide, polyphenylene sulfide, polyphenylene sulfone, polysulfone, polystyrene, styrene-acrylonitrile (SAN) copolymer, styrene copolymer, butadiene -Styrene copolymer, polyurethane, vinyl acetate resin, polyvinyl alcohol Tar, polyvinyl alcohol, polyvinyl chloride, acrylic-modified polyvinyl chloride, polyvinylidene chloride, silicone, xylene resins, and the like.

In the present invention, polymers which can be typically used, their refractive indices, and glass transition temperatures are shown below. Polymer n T _g (K °) ──────────────────────────────────── Polyvinylidene fluoride 1.42 233 Polydimethylsilylene (polydimethylsiloxane) 1.43 146 Polyoxypropylene 1.4495 198 Polyvinyl isobutyl ether 1.4507 254 Polyvinylethyl ether 1.4540 230 Polyoxyethylene 1.4563 232 Polyvinylbutylether 1.4563 218 Polyvinylpentyl ether 1.4581 207 Polyvinylhexyl ether 1.4591 199 Poly (4-methyl- 1-pentene) 1.459 -1.465 302 Cellulose acetate butyrate 1.46 -1.49 322-388 Polyvinyl octyl ether 1.4613 194 Poly (vinyl 2-ethylhexyl ether) 1.4626 207 Polyvinyl decyl ether 1.4628 211 Poly (2-methoxyethyl acrylate) 1.463 223 Polybutyl Acri 1.4631 251 Poly (t-butyl methacrylate) 1.4638 333 Poly (3-ethoxypropyl acrylate) 1.465 218 Polyvinyl propionate 1.4665 283 Polyvinyl acetate 1.4665 305 Polyvinyl methacrylate 1.467 242 Polyethyl acrylate 1.4685 249 Ethylene-vinyl acetate copolymer 1.47 -1.50 (80% -20% vinyl acetate) Cellulose propionate 1.47 -1.49 400 Cellulose triacetate 1.47 -1.48 322-751 Polyvinyl methyl ether (isotactic) 1.4700 242 Poly (3-methoxypropyl acrylate) 1.471 198 Poly ( 2-ethoxyethyl acrylate) 1.471 223 poly (methyl acrylate) 1.472 -1.480 283 poly isopropyl methacrylate 1.4728 354 poly (1-decene) 1.4730 232 polypropylene (atactic, density of 0.8575g / cm ³ 1.4735 260 Poly (vinyl sec-butyl ether) (isotactic) 1.4740 254 Polydodecyl methacrylate 1.4740 208 Polyoxyethyleneoxysuccinoyl 1.4744 244 (Polyethylene succinate) Polytetradecyl methacrylate 1.4746 201-264 Ethylene-propylene copolymer (EPR-rubber) 1.4748-1.48 140-260 Polyhexadecyl methacrylate 1.4750 288 Polyvinyl formate 1.4757 310 Polyisobutyl methacrylate 1.477 333 Ethyl cellulose 1.479 316 Polyvinyl acetal 1.48 -1.50 305 Cellulose acetate 1.48 -1.50 322-751 Cellulose tripropionate 1.48- 1.49 400 Polyoxymethylene 1.48 232 Polyvinyl butyral 1.48 -1.49 322 Poly (n-hexyl methacrylate) 1.4813 268 Poly (n-butyl methacrylate) 1.483 293 Poly (n-propyl methyl) 1.484 308 Polyethyl methacrylate 1.485 338 Poly (1,1-diethylpropyl methacrylate) 1.4889 268 Polymethyl methacrylate 1.4893 378 Poly (2-decyl-1,3-butadiene) 1.4899 220 Polyvinyl alcohol 1.49 -1.53 358 Polyethyl glycolate Methacrylate 1.4903 328 Methylcellulose (low viscosity) 1.497 423 Polyurethane 1.5 -1.6 200-400 Poly (1,2-butadiene) 1.5000 269 Polyvinyl formal 1.50 Cellulose nitrate 1.50 -1.514 326 Poly (2-heptyl-1,3-butadiene) 1.5000 190 Poly (2-isopropyl-1,3 butadiene) 1.5028 221 Polypropylene (density 0.9075 g / cm ³ ) 1.5030 260 Polyisobutene 1.505 -1.51 200 Polybornyl methacrylate 1.5059 383 Poly (2-t-butyl-1,3-butadiene) ) 1.5060 293 Polyer Tylene glycol dimethacrylate 1.5063 polycyclohexyl methacrylate 1.5066 356 gutta percha (β) 1.509 215 polyoxyethylene (high molecular weight) 1.51 -1.54 232 polyethylene (density 0.914 g / cm ³ ) 1.51 148 poly (2-hydroxyethyl methacrylate) 1.5119 328 polybutene Isotactic) 1.5125 249 Gutta percha (α) 1.514 215 Poly (1,3-butadiene) 1.5154 269 Poly (2-chloroethyl methacrylate) 1.517 365 Poly (2-diethylaminoethyl methacrylate) 1.5174 289 Natural rubber 1.519 -1.52 200 Polyacrylonitrile 1.52 polymethacrylonitrile 1.52 polyisoprene 1.521 200 polyacrylic acid 1.527 379 poly (1-vinyl-2-pyrrolidone) 1.53 327 cellulose 1.54 243-443 polyvinyl chloride 1.54 -1.55 354 poly (2-bromoethylmeta) 1.5426 325 Poly (N-allyl methacrylamide) 1.5476 433 Polyisopropyl methacrylate 1.552 354 Poly (p-isopropylstyrene) 1.554 360 Polychloroprene 1.554 -1.558 253 Polybenzyl methacrylate 1.5680 327 Polyphenyl methacrylate 1.5706 383 Poly (oxy-2, 6-dimethylphenylene) 1.575 482 polyoxyethyleneoxyterephthaloyl (amorphous) 1.5750 342 polyvinylbenzoate 1.5775 344 poly (4-methoxy-2-methylstyrene) 1.5868 358 poly (o-methylstyrene) 1.5874 409 polystyrene 1.59 -1.592 373 Poly (o-methoxystyrene) 1.5932 348 Poly (p-methoxystyrene) 1.5967 362 Polyvinylidene chloride 1.60 -1.63 255 Poly (o-chlorostyrene) 1.6098 392 Poly (2,6-dichlorostyrene) 1.6248 440 Poly As particularly among these sulfonyl naphthalene 1.6818 432 polyvinylcarbazole 1.683 423,481 preferred, relatively Tg is high cushioning low, polyvinyl acetate, polybutadiene, polyvinyl butyral, and the like.

Examples of the plasticizer include phthalate plasticizers such as polyhydric alcohols such as ethylene glycol, diethylene glycol, triethylene glycol, glycerin and trimethylolpropane, such as dimethyl phthalate (DMP) and diethyl phthalate (DE).
P), dibutyl phthalate (DBP), heptyl nonyl phthalate (HNP), di-2-ethylhexyl phthalate (DOP), di-n-octyl phthalate (DNOP),
Di-i-octyl phthalate (DCapP), (79 alkyl) phthalate (D79P), di-i-decyl phthalate (DIDP), ditridecyl phthalate (DTDP),
It is an aliphatic dibasic ester plasticizer such as dicyclohexyl phthalate (DCHP), butylbenzyl phthalate (BDP), ethylphthalylethyl glycolate (EPEG), and butylphthalylbutyl glycolate (BPBG).

Di-2-ethylhexyl adipate (DO)
A), di (methylcyclohexyl) adipate, diisodecyl adipate (DIDA), di-n-azelate
Citric acid ester plasticizers such as hexyl (DNNH), di-2-ethylhexyl azelate (DOZ), dibutyl sebacate (DBS), and di-2-ethylhexyl sebacate (DOS).

Triethyl citrate (TEC), tributyl citrate (TBC), triethyl acetyl citrate (ATEC), tributyl acetyl citrate (ATB)
C) Epoxy plasticizers such as epoxidized soybean oil (E
SO) etc. Tributyl phosphate (T
BP), triphenyl phosphate (TPP), tricresyl phosphate (YCP), tripropylene glycol phosphate and the like.

The thickness of the cushion layer is 1 to 1000 μm.
m, preferably 20 to 100 μm. If it is too thin, the cushioning property is low, and if it is too thick, it adversely affects optical properties (haze, transmittance, etc.).

The amount of the plasticizer contained in the binder is 0.
８０80%, preferably 10-50%. If the amount is too small, the effect on plasticity is low, and if it is too large, the coating film strength is reduced.

As for the polymer layer in which the cushion layer is made of an adhesive, the adhesive polymer layer may be prepared by applying a solution type on a glass substrate or by laminating a film type. It can be used in the present invention.

Solution Coating Method A method of applying a solvent-type pressure-sensitive adhesive in a state of being dissolved in a solvent or the like, followed by drying, and using a rubber-based, acrylic, or silicone-based pressure-sensitive adhesive.

Rubbers include natural rubber, styrene-butadiene rubber, polyisobutylene rubber, isoprene rubber, etc. Acrylics include copolymers containing 2-ethylhexyl acrylate as a main monomer, etc. Silicones include rubbery siloxane And silicone polymers containing resinous siloxane as a main component.

As the coating solvent, toluene, trichlene, normal hexane, ethyl acetate, toluene, methyl ethyl ketone and the like are used.

Emulsion type adhesives and hot melt type adhesives can also be used.

Film bonding method A commercially available film-form double-sided pressure-sensitive adhesive in which the above-mentioned pressure-sensitive adhesive is formed in the form of a support film can be used.
As shown in FIG. 2A, the double-sided pressure-sensitive adhesive preferably has only a pressure-sensitive adhesive. In FIG. 2A, protective films 22 are attached to both surfaces of the adhesive layer. In addition, as shown in FIG. 2B, when the adhesive layer 21 is adhered to both surfaces of the support film 20, it is necessary that the film is made of polypropylene or polyvinyl chloride having no or little polarized light. When the supporting film has polarized light such as PET, the reproduced product has stripe-like unevenness or the like.

In addition to the above polymers, ionizing radiation curable materials can be used. As the ionizing radiation-curable material, an electron beam-curable resin and an ultraviolet-curable resin are useful, and the electron beam-curable resin and the ultraviolet-curable resin are such that the latter contains a photopolymerization initiator and a sensitizer. The components are the same, except that, in general, a film-forming component containing a polymer, oligomer, or monomer having a radically polymerizable active group in its structure as a main component. It is desirable that it be 2000 cps or less. As such polymers and oligomers, those easily available from commercial products such as urethane acrylate and polyester acrylate can be applied to the present invention. As the monomer, a commercially available ionizing radiation curable monomer such as an acrylic acid or methacrylic acid derivative is applicable to the present invention. In order to make the above cured resin an ultraviolet curable resin, acetophenones as a photopolymerization initiator therein,
Benzophenone, Michler benzoyl benzoate, α
-Aminoxime esters, tetramethylthiuram monosulfide, thioxanthones, and n as photosensitizers
-Butylamine, triethylamine, tri-n-butylphosphine and the like can be mixed and used.

Conventional techniques can be directly applied to the ionizing radiation irradiation method. For example, in the case of electron beam irradiation, Cockloft-Walton type, Bande graph type, Resonant transformation type, Insulating core transformer type, Linear type, Dynamitron type , 50-1,000 emitted from various electron beam accelerators such as high frequency type
KeV, preferably, an electron beam having an energy of 100 to 300 KeV is applied to an electron beam of 0.1 to 100 Mrad. , Preferably 1 to 10 Mrad. It can be cured by irradiation, and in the case of ultraviolet irradiation, ultraviolet light emitted from a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a carbon arc, a xenon arc, a metal halide lamp,
0.1 to 10,000 mJ / cm ² , preferably 10
It can be cured by irradiating 〜1,000 mJ / cm ² .

Referring to FIG. 3, the duplication apparatus used in the present invention will be described. As shown in FIG.
Is fed from the supply roller 22 and wound up by the winding roller 23. The original plate layer 26 is placed on a support 24 that moves up and down, and a contact liquid is dropped by a contact liquid dropping device 25, and the support 24 is raised to bring the photosensitive material film 21 for copying into close contact. Excess liquid is removed by squeezing with a roller 27. Next, the contact liquid is dropped on the recording film 21 by the contact liquid dropping device 28, and is brought into close contact with the AR-coated ND layer 29. Also at this time, the excess liquid is squeezed out with a roller or the like, and the liquid is pressed by the pressing device 32 to be in close contact. At this time, when the thickness of the ND layer is large and the roller is not excessive, the thickness is set to 0.1 to 1.5 mm, and the material is a polymer material having no optical birefringence and having the same refractive index. Is used, so that it is possible to have flexibility and to squeeze out excess liquid. In addition, by providing the cushion layer on the AR-coated ND layer 29, the vibration of the contact liquid can be suppressed during the exposure duplication.

A laser beam 30 which is conjugate to the original layer is incident on the replication system thus formed, and exposure replication is performed. When the duplication is completed, the AR coated ND layer is removed, and the recording film 21 is separated from the duplication system by processing the original layer. The separated recording film 12 enters a drying chamber 31 and is dried to remove the adhered liquid. The dried film is collected by the take-up roller 23. These move as a series of operations, and copying is performed continuously. It is also possible to increase the productivity by attaching a plurality of these exposure units and drying units.

[0025]

The present invention uses a thin ND glass having flexibility, a flexible sheet, and a hard ND glass coated with a cushion layer, with an optical adhesion liquid interposed therebetween to form a photosensitive material film for duplication. It is made to adhere,
By applying pressure, pressure is applied uniformly to the optical contact liquid, so that the contact liquid can be made uniform and thin,
It is possible to prevent the hologram image from being unable to be duplicated due to the flow of the contact liquid. Also, ND with AR coat
By providing a cushion layer on the inner surface of the glass or on the upper surface of the photosensitive material film, and on the optical contact liquid side of the original plate protective glass or on the lower surface of the photosensitive material film, even if dirt is mixed in, it embraces the inside and causes the flow of the adhesion liquid and dust. The film can be prevented from being lifted up, and duplication can be performed without any trouble. An apparatus for performing such a hologram duplication method is provided with a mechanism for feeding the photosensitive material film for duplication and a winding mechanism, a mechanism for dropping a contact liquid drop, a mechanism for nipping an excess of the dropped contact liquid, and a light exposure. It is constituted by providing a mechanism for drying the contact liquid adhering to the copied photosensitive material for copying, a photosensitive material film positioning mechanism for copying, and the like.

[0026]

【Example】

[Examples 1 to 3] The following solutions were applied to original glass using an applicator.

Example 1 Gelatin (P3829: Nitta Gelatin) 100 parts by weight Water 50 parts by weight (solution at 50 ° C.) Example 2 Gelatin (P3829: Nitta Gelatin) 50 parts by weight Glycerin 40 parts by weight Water 40 parts by weight (solution at 50 ° C.) Example 3 Gelatin (P3829: Nitta Gelatin) 50 parts by weight Gelatin (TypeU: Nitta Gelatin) 10 parts by weight Glycerin 40 parts by weight Water 40 parts by weight (solution at 50 ° C.) After coating, it was cooled to 0 ° C. to form a 50 μm coating,
The resultant was dried by heating at 100 ° C. for 1 hour to prepare a cushion layer.

The solution of [Example 2]
It was also manufactured by spin-coating at 250 rpm on a glass substrate that had been subjected to V ozone treatment.

Example 4 Agar 100 parts by weight Water 50 parts by weight (solution at 90 ° C.) After coating, the mixture was cooled to 0 ° C. to form a 50 μm coating film, thereby producing a cushion layer (4).

[Examples 5 to 6] [Example 5] The following solutions were applied to original glass using an applicator.

Polyvinyl acetate (co-phenyl PV-500: Nippon Gohsei) 100 parts by weight Di-2-ethylhexyl phthalate (DOP: Daihachi Chemical) 30 parts by weight Methyl ethyl ketone 150 parts by weight Toluene 50 parts by weight [Example 6] Polyvinyl butyral (Esrec BX-1: Sekisui Chemical) 100 parts by weight Di-2-ethylhexyl phthalate (DOP: Daihachi Chemical) 30 parts by weight Methyl ethyl ketone 150 parts by weight Toluene 50 parts by weight After coating, heat-dried at 100 ° C. for 5 minutes. By doing 50
A coating film having a thickness of μm was formed, and a cushion layer was formed.

Example 7 The following solution was spin-coated on an original glass.

Coating type adhesive: 100 parts by weight of acrylic acid copolymer 10 parts by weight of xylene resin 1 part by weight of isophorone diisocyanate 150 parts by weight of ethyl acetate After coating, the mixture is heated and dried at 100 ° C. for 5 minutes to obtain 50 parts.
A coating film of μm was formed, and a cushion layer (7) was produced.

Example 8 A cushion layer (8) was prepared by pasting a double-sided adhesive film (Neomask: manufactured by Nitto Denko) on an original glass using a rubber roller.

Example 9 An ultraviolet curable resin (Aronix UV-3033: Toa Gosei Chemical Co., Ltd.) was placed on an original glass.
Was applied to a film thickness of 50 μm, and irradiated with ultraviolet rays to produce a cushion layer (9).

Example 10 The following solution was spin-coated on an original glass.

Urethane acrylate (UV-3000B: Nippon Synthetic Chemical) 100 parts by weight Acrylic monomer (Aronix M-101: Toa Gosei Chemical) 100 parts by weight Dipetantaerythritol pentaacrylate 20 parts by weight (Sartomer 399: Sartomer) Further electron beam Was applied to produce a cushion layer having a thickness of 50 μm.

[Examples 11 to 12] In Examples 11 to 12, the initiator (Ciba Geigy: Irgacure 184) was used.
(3 to 5% by weight) to prepare a UV-cured urethane acrylate.

Example 11 Zinetec: SC-3120 + Irgacure Example 12 Toa Gosei: 50 parts by weight of N-vinyl-2-pyrrolidone Toa Gosei: 50 parts by weight of Aronix M-5600 Nippon Gohsei: Shikko UV-3000B 100 Parts by weight Toa Gosei: 2 parts by weight of HK-20 Examples 11 and 12 are those using a glass (or PMMA) bonding method, and heating the solution to 50 ° C to 80 ° C.
Make the primer (methanol 10
A double-diluted chemlock 607) is applied and applied to one end of a glass substrate or an acrylic resin heated to the same temperature, and a release agent (Asahi Glass: Mold Spat MR-K) is applied from above.
681) is applied, covered with warm glass, and pressurized so that the solution gradually spreads over the entire surface. After UV exposure, the upper glass is peeled off.

When holograms were produced using the original plates of Examples 1 to 12, good holograms with few defects could be reproduced in each case (Table 1). The results are obtained when Omnidex 352 (Dupont) was used as the duplicated photosensitive material.

On the other hand, when duplication was performed without providing a cushion layer, many defects due to dust were observed.

[0042]

[0043]

As described above, according to the present invention, a cushion layer is provided on a flexible ND glass or sheet, or on the optical contact liquid side of the ND glass, and a pressure is uniformly transmitted to the contact liquid to form a cushion layer. By making the thickness uniform and thin, eliminating the flow of the contact liquid during exposure, it is possible to duplicate a good hologram, and it is also possible to increase the productivity of hologram duplication by continuously supplying a recording film. . Also, by providing a cushion layer on the inner surface of the ND glass with AR coating or on the upper surface of the photosensitive material film, and on the optical adhesion liquid side of the original plate protective glass or on the lower surface of the photosensitive material film,
Even if dust is mixed, the dust is embraced inside, preventing the flow of the contact liquid and the lifting of the film due to the dust, and the duplication can be performed without any trouble.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a method of duplicating a hologram provided with a cushion layer according to the present invention.

FIG. 2 is a view for explaining a film bonding method.

FIG. 3 is a diagram illustrating a copying apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... ND glass with AR coating, 2,7,9 ... Optical contact liquid, 3 ... Original support glass, 4 ... Original film, 5 ... Optical adhesive, 6 ... Original holding glass, 8 ... Photosensitive material film for duplication, 15 , 16 ... cushion layer.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G03H 1/00-1/32

Claims (4)

(57) [Claims] 1. An original plate having a protective glass adhered to the upper surface of an original hologram supported by a support, and an N.sub.2 coated with a photosensitive material film for duplication through an optical contact liquid.
A method of recording an image of an original hologram on a photosensitive material film for duplication by irradiating a portion to be duplicated which is in close contact with D glass and irradiating a laser beam on the duplicated photosensitive material film or a lower surface of the original material protective glass or a lower surface of the duplication material film. A cushion layer mainly composed of a polymer having high elasticity is provided, and the cushion layer is formed on the cushion layer.
Adjacently, the cushion layer and the portion to be copied or the
Between the original section, it is interposed an optical contact liquid, hologram method replication, characterized in that it has reduced the crater-like defect generation caused foreign matter mixed in the foreign matter embedded in the cushion layer during replication. 2. The method according to claim 1, wherein the cushion layer is a polymer layer composed of only a binder polymer having high elasticity or a binder polymer to which a plasticizer is added to impart sufficient elasticity. Hologram duplication method. 3. The method according to claim 1, wherein the cushion layer is a polymer layer made of a highly elastic adhesive made of a binder polymer, a monomer, or the like. 4. The method according to claim 1, wherein the cushion layer is a polymer layer made of an ionizing radiation-curable resin comprising a binder polymer, a monomer and the like.