JPH02113287A - Manufacture of hologram - Google Patents
Manufacture of hologramInfo
- Publication number
- JPH02113287A JPH02113287A JP26686988A JP26686988A JPH02113287A JP H02113287 A JPH02113287 A JP H02113287A JP 26686988 A JP26686988 A JP 26686988A JP 26686988 A JP26686988 A JP 26686988A JP H02113287 A JPH02113287 A JP H02113287A
- Authority
- JP
- Japan
- Prior art keywords
- light
- hologram
- layer
- antireflection layer
- absorbing material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000010410 layer Substances 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims abstract description 44
- 239000011358 absorbing material Substances 0.000 claims abstract description 23
- 239000012790 adhesive layer Substances 0.000 claims abstract description 5
- 238000002834 transmittance Methods 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 4
- 229920006026 co-polymeric resin Polymers 0.000 claims description 3
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 claims 1
- 230000003449 preventive effect Effects 0.000 abstract 6
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 230000000593 degrading effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 235000007173 Abies balsamea Nutrition 0.000 description 1
- 239000004857 Balsam Substances 0.000 description 1
- 244000018716 Impatiens biflora Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000011044 quartzite Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Holo Graphy (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ホログラムの作製方法に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for producing a hologram.
ホログラムは情報を帯びた光の波面を記録する技術であ
り、通常は板、フィルム等の基板上に設けられたホログ
ラム記録層に情報光と参照光との干渉縞を透過率、屈折
率もしくは凹凸の分布の形で記録している。Hologram is a technology that records the wavefront of information-bearing light. Usually, interference fringes between information light and reference light are recorded on a hologram recording layer provided on a substrate such as a plate or film by transmittance, refractive index, or unevenness. It is recorded in the form of a distribution.
従来のホログラムの作製方法は第３図に示すように、記
録層２に対して照射された２つの光束５゜６が干渉縞を
形成し、ホログラム記録層２に記録される。同時にホロ
グラム記録層２を透過した光は基材３を透過し、反射防
止層１３により吸収される。In the conventional hologram manufacturing method, as shown in FIG. 3, two light beams 5°6 irradiated onto the recording layer 2 form interference fringes, which are recorded on the hologram recording layer 2. At the same time, the light that has passed through the hologram recording layer 2 passes through the base material 3 and is absorbed by the antireflection layer 13.
次にこうして撮影されたホログラム記録材料ｌの反射防
止層１３を取り除いて現像し、第４図に示すように記録
層２と反対側の面から参照光６と平行な再生用の光１０
を照射し、情報光５と平行な再生光１１が得られる。Next, the anti-reflection layer 13 of the hologram recording material l photographed in this way is removed and developed, and as shown in FIG.
, and a reproduction light 11 parallel to the information light 5 is obtained.
ところで、上記反射防止層１３は一般的に２種類に分け
ることができる。By the way, the antireflection layer 13 can generally be divided into two types.
一つは光吸収材料を有する反射防止層であり、材料をう
まく選択すれば第３図に示すような裏面での反射はほと
んど発生しない。One is an antireflection layer containing a light-absorbing material, and if the material is properly selected, reflection on the back surface as shown in FIG. 3 will hardly occur.
もう一つは光透過性を有する反射防止層すなわちホログ
ラム記録材料の基材３の屈折率と外気の屈折率との中間
程度の屈折率を有する光透過性の高い材質を一層ないし
多層被着させた反射防止層であり、この場合は記録及び
再生段階で同じ反射防止層が利用でき、後述するような
レーザー再生段階で発生する不要な干渉縞の軽減に役立
つもののの、記録段階に発生する裏面反射を充分に防止
することが困難であるため不要な干渉縞が記録され、そ
れが再生像に現れてしまう。The other method is to deposit one or more layers of a light-transmitting anti-reflection layer, that is, a highly light-transmitting material having a refractive index that is intermediate between the refractive index of the base material 3 of the hologram recording material and the refractive index of the outside air. In this case, the same antireflection layer can be used in the recording and reproduction stages, and although it is useful for reducing unnecessary interference fringes that occur during the laser reproduction stage as described below, Since it is difficult to sufficiently prevent reflection, unnecessary interference fringes are recorded and appear in the reproduced image.
また、従来は反射防止層１３が不完全なものが多く、そ
の場合第３図に示すように入射光束５゜６の裏面反射が
発生し、それらの裏面反射光束と入射光束５．６が干渉
して不要な干渉縞が再生像中に表れ、再生像の質を低下
させてしまうという問題があった。Furthermore, in the past, the antireflection layer 13 was often incomplete, and in that case, as shown in FIG. Therefore, there is a problem in that unnecessary interference fringes appear in the reproduced image, degrading the quality of the reproduced image.
そこで記録段階において、光吸収材料を有する反射防止
層を設けて不要な干渉縞の発生を抑えたとしても、この
ホログラムをレーザ再生するときは前記反射防止層を除
去する必要があり、その場合、第４図に示されるように
ホログラム記録層と基材間で生ずる繰り返し反射光１４
と入射光１０により不要な干渉縞が発生し、これが再生
像中に表れて再生像の質を低下させてしまうという問題
があった。また裏面において反射光１５が生じ、照明光
が有効利用できず再生像が暗くなるという問題もあった
。Therefore, even if an anti-reflection layer containing a light-absorbing material is provided in the recording stage to suppress the generation of unnecessary interference fringes, it is necessary to remove the anti-reflection layer when reproducing this hologram with a laser. As shown in FIG. 4, repeatedly reflected light 14 occurs between the hologram recording layer and the base material.
There is a problem in that unnecessary interference fringes are generated by the incident light 10 and appear in the reproduced image, degrading the quality of the reproduced image. There is also the problem that reflected light 15 occurs on the back surface, making it impossible to use the illumination light effectively and resulting in a dark reproduced image.
本発明は上記問題点を解決するためのもので、ホログラ
ムを記録する段階と、再生する段階で異なる反射防止層
を用いることにより、再生像に不要な干渉縞が発生する
ことを防止し、再生像を明るくすることができるホログ
ラムの作製方法を擾供することを目的とする。The present invention is intended to solve the above problems, and by using different antireflection layers at the stage of recording a hologram and the stage of reproducing it, it is possible to prevent unnecessary interference fringes from occurring in the reproduced image. The purpose is to provide a method for producing a hologram that can make the image brighter.
そのために本発明は、ホログラムの記録段階と再生段階
の２つの工程において異なる反射防止層を設けることに
より、最終的なホログラム再生像から不要な干渉縞を除
去して再生像を明るくするようにしたものである。To this end, the present invention removes unnecessary interference fringes from the final reconstructed hologram image and brightens the reconstructed image by providing different anti-reflection layers in the two steps of hologram recording and reproduction. It is something.
ホログラムの記録段階においては、第１図に示すように
、記録層が形成された基材の反対面に、基材と同程度、
具体的には違いが基材の屈折率に対して±３％以内の屈
折率を有する光吸収材料を有する反射防止層４を施すこ
とによって基材３と反射防止層４間の界面の反射を掻力
抑え、ここを透過した光を光吸収材料で吸収して記録時
における不要な干渉縞の発生を防止する。In the hologram recording stage, as shown in Fig. 1, on the opposite side of the base material on which the recording layer is formed, a layer of the same extent as the base material is coated.
Specifically, the difference is that reflection at the interface between the base material 3 and the anti-reflection layer 4 is reduced by applying the anti-reflection layer 4 containing a light-absorbing material having a refractive index within ±3% of the refractive index of the base material. The scratching force is suppressed, and the light that passes through is absorbed by the light absorbing material, thereby preventing the generation of unnecessary interference fringes during recording.
次に現像されたホログラム記録材料から反射防止層４を
取り除き、再生段階においては、第２図に示すように、
接着層７により光透過性材料８及び光透過性の高い反射
防止層９を設けることによって、第４図に示されるよう
なレーザ光の繰り返し反射光１４と照明光１０により形
成される不要な干渉縞を除去し、また裏面での反射光１
５を少なくして再生像を明るくしている。Next, the antireflection layer 4 is removed from the developed hologram recording material, and in the reproduction stage, as shown in FIG.
By providing the light-transmitting material 8 and the highly light-transmitting antireflection layer 9 using the adhesive layer 7, unnecessary interference formed by the repeatedly reflected light 14 of the laser beam and the illumination light 10 as shown in FIG. 4 can be avoided. Removes stripes and also reduces reflected light on the back side 1
5 is reduced to make the reproduced image brighter.
本発明は、ホログラム記録段階において、基材３と反射
防止層４とで屈折率の差がほとんどないためそれらの間
の反射が極めて少なく透過した光は光吸収材料により吸
収され、記録層２への不要な干渉縞の記録が抑制される
。また、再生段階において光透過性の高い反射防止層９
を少なくとも基材の一面に施すことにより、第４図にお
ける反射光１４のような不要な反射が生ぜず、透過光１
２となって不要な干渉縞の再生が抑制される。また、第
４図に示すような裏面での反射光１５が少なくなるため
照明光を有効に利用でき再生像を明るくすることができ
る。In the present invention, in the hologram recording stage, since there is almost no difference in refractive index between the base material 3 and the antireflection layer 4, there is very little reflection between them, and the transmitted light is absorbed by the light absorption material and transferred to the recording layer 2. The recording of unnecessary interference fringes is suppressed. In addition, in the reproduction stage, an antireflection layer 9 with high light transmittance is provided.
By applying this to at least one surface of the base material, unnecessary reflection such as the reflected light 14 in FIG. 4 does not occur, and the transmitted light 1
2, and reproduction of unnecessary interference fringes is suppressed. Furthermore, since the amount of reflected light 15 on the back surface as shown in FIG. 4 is reduced, illumination light can be used effectively and the reproduced image can be made brighter.
以下、図面を参照しつつ本発明の実施例について説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例に係るホログラムの作製方法
の記録段階を説明するための図である。FIG. 1 is a diagram for explaining a recording step of a hologram manufacturing method according to an embodiment of the present invention.
本実施例では、ホログラム記録材料１にアグファーゲバ
ルト社製ホロテスト８Ｅ７５ＨＤＮＡＨを、光吸収材料
を有する反射防止層４に塩化ビニル系と酢酸ビニル系の
共重合体の樹脂を、光吸収材料として青色の染料を樹脂
に分散させて使用した。In this example, the hologram recording material 1 is Holotest 8E75HDNAH manufactured by Agfargewald, the anti-reflection layer 4 having a light-absorbing material is a copolymer resin of vinyl chloride and vinyl acetate, and the light-absorbing material is a blue-colored one. The dye was used after being dispersed in the resin.
このような光吸収材料を有する反射防止層４を塗布した
ホログラム記録材料ｌに対し、Ｈｅ−Ｎｅレーザーによ
り記録層側から面の法線に対して４５°の角度をなす互
いに逆の方向から平行光５゜６を入射することにより、
回折格子をホログラム記録層２に形成した。ホログラム
記録層２、基材３を透過した光は光吸収材料によって吸
収されるため不要な干渉を生じることはない。実際にコ
ダック社製０１９現像液で現像することにより、不要な
干渉縞のない回折格子を得ることができた。A hologram recording material l coated with an anti-reflection layer 4 having such a light-absorbing material is heated from the recording layer side in parallel directions at an angle of 45° to the normal to the surface using a He-Ne laser. By entering light 5°6,
A diffraction grating was formed on the hologram recording layer 2. Since the light transmitted through the hologram recording layer 2 and the base material 3 is absorbed by the light absorbing material, unnecessary interference does not occur. By actually developing with Kodak 019 developer, a diffraction grating without unnecessary interference fringes could be obtained.
なお、上記実施例では光吸収材料を有する反射防止層４
に塩化ビニル系と酢酸ビニル系の共重合体の樹脂を用い
、該樹脂に光吸収材料を分散させたが、光吸収材料を樹
脂に対して層状に設けるようにしてもよく、また光吸収
材料を有する反射防止層４に塩化ビニル系または酢酸ビ
ニル系の樹脂を用い、これらの樹脂に光吸収材料を分散
させるか、あるいは層状に設けるようにしてもよい。In addition, in the above embodiment, the antireflection layer 4 having a light absorption material
In this method, a vinyl chloride-based and vinyl acetate-based copolymer resin was used, and a light-absorbing material was dispersed in the resin, but the light-absorbing material may be provided in a layer on the resin. The antireflection layer 4 may be made of vinyl chloride or vinyl acetate resin, and the light absorbing material may be dispersed in these resins or provided in a layered manner.
また、反射防止層４は露光後、除去する必要があるので
、基材に対して剥離しやすい光吸収材料を用いるように
することが望ましい。Further, since the antireflection layer 4 needs to be removed after exposure, it is desirable to use a light-absorbing material that is easily peeled off from the base material.
第２図は、本発明の一実施例に係るホログラムの作成方
法の再生段階を説明するための図で、本実施例では光透
過性材料８に平板ガラスを、接着層７に純正化学社製カ
ナダバルサムを使用し、光透過性の高い反射防止層９に
Ｍ ｇ Ｆ ｚを平板ガラスに被着させた。FIG. 2 is a diagram for explaining the reproduction stage of a hologram creation method according to an embodiment of the present invention. Using Canadian balsam, M g F z was applied to a flat glass as an antireflection layer 9 with high light transmittance.
このような光透過性の高い反射防止層９を設けた現像済
のホログラム記録材料に対してＨｅ−Ｎｅレーザーによ
り反射防止層９側から法線に対して４５°の角度から平
行光を照明し、平行光を再生させた。照明した光１０は
再生光１１となって回折されるが、不要な反射は光透過
性の高い反射防止層９のため透過光１２となって再生像
中に不要な干渉縞が現れることはない。また裏面での反
射光１５が少なくなるため再生像が明るくなる。A developed hologram recording material provided with such a highly transparent antireflection layer 9 is illuminated with parallel light from the antireflection layer 9 side at an angle of 45° to the normal using a He-Ne laser. , reproduced parallel light. The illuminated light 10 becomes reproduced light 11 and is diffracted, but unnecessary reflections become transmitted light 12 because of the highly transparent anti-reflection layer 9, so that unnecessary interference fringes do not appear in the reproduced image. . Furthermore, since the amount of reflected light 15 on the back surface is reduced, the reproduced image becomes brighter.
実際、光透過性の高い反射防止層９がないときと比較し
て、不要な干渉縞がほとんどない明るい再生像を得るこ
とができた。また基材３、接着層７、光透過性材料８の
屈折率を±３％以内に抑えることによってこれらの間の
界面反射を極力抑える必要がある。In fact, a bright reproduced image with almost no unnecessary interference fringes could be obtained compared to the case without the antireflection layer 9 having high light transmittance. In addition, it is necessary to suppress reflection at the interface between the base material 3, the adhesive layer 7, and the light-transmitting material 8 as much as possible by suppressing the refractive index of these materials within ±3%.
なお、光透過性の高い反射防止層９としては、第２図の
例では一層であるが、二層、三層あるいはそれ以上の多
層の反射防止層を被着させて反射防止効果を向上させる
ことができる。The antireflection layer 9 with high light transmittance is one layer in the example shown in FIG. 2, but two, three, or more antireflection layers may be applied to improve the antireflection effect. be able to.
また、反射防止層９の材質としては、Ｍ ｇ Ｆ ２、
Ｓｉｎ、５ｉｎｓ、ＺｎＳ、水晶石、 Ｃｒ、 ＬｉＦ
等がよく用いられるが、これらに限定されるわけではな
く、要するに反射防止効果のあるものであれば何でもか
まわない。なお、反射防止層９の被着方法については、
吹付は法、蒸着法、スパッタリング法等が用いられるが
、この他の方法で被着してもよい。Moreover, the material of the antireflection layer 9 includes M g F 2 ,
Sin, 5ins, ZnS, quartzite, Cr, LiF
etc. are often used, but the material is not limited to these, and in short, any material may be used as long as it has an antireflection effect. Regarding the method of applying the antireflection layer 9,
The spraying method, vapor deposition method, sputtering method, etc. are used, but other methods may also be used.
以上のように本発明によれば、ホログラムの作製方法に
おいて、ホログラム記録過程で、光吸収材料を有する反
射防止層を設けるようにしたので、不要な干渉縞の記録
を低減化させることができ、ホログラム再生過程におい
ては光透過性の高い反射防止層を設けるようにしたので
不要な干渉縞の再生を低減化させるとともに、裏面での
反射を減少させることができるため再生像が明るくなり
Ｓ／Ｎ比の極めて高い再生像を得ることが可能である。As described above, according to the present invention, in the hologram manufacturing method, an antireflection layer containing a light-absorbing material is provided during the hologram recording process, so that recording of unnecessary interference fringes can be reduced. In the hologram reproduction process, an anti-reflection layer with high light transmittance is provided, which reduces the reproduction of unnecessary interference fringes, and also reduces reflection on the back surface, making the reproduced image brighter and improving S/N. It is possible to obtain a reproduced image with an extremely high ratio.
第１図は本発明の一実施例のホログラム作製方法の記録
段階を説明するための図、第２図は本発明の一実施例の
ホログラム作製方法の再生段階を説明するための図、第
３図はホログラム記録段階における不要な干渉縞を生ず
る反射光を説明するための図、第４ｒＩ！Ｊはホログラ
ム再生段階における不要な干渉縞を生ずる反射光、及び
裏面での反射光を説明するための図である。
■・・・ホログラム記録材料、２・・・ホログラム記録
層、３・・・基材、４・・・反射防止層、５・・・情報
光、６・・・参照光、７・・・接着層、８・・・光透過
性材料、９・・・反射防止層、ｌＯ・・・照明光、１１
・・・再生光、１２・・・裏面反射透過光。
出 願 人 大日本印刷株式会社代理人 弁理士
蛭 川 昌 信（外５名）第２
第４FIG. 1 is a diagram for explaining the recording stage of a hologram production method according to an embodiment of the present invention, FIG. 2 is a diagram for explaining the reproduction stage of a hologram production method according to an embodiment of the present invention, and FIG. The figure is a diagram for explaining reflected light that causes unnecessary interference fringes in the hologram recording stage, 4th rI! J is a diagram for explaining reflected light that causes unnecessary interference fringes in the hologram reproduction stage and reflected light on the back surface. ■... Hologram recording material, 2... Hologram recording layer, 3... Base material, 4... Antireflection layer, 5... Information light, 6... Reference light, 7... Adhesion Layer, 8... Light-transmissive material, 9... Antireflection layer, lO... Illumination light, 11
... Reproduction light, 12... Back reflection transmitted light. Applicant Dai Nippon Printing Co., Ltd. Agent Patent Attorney Masanobu Hirukawa (5 others) No. 2 4
Claims (8)
記録するホログラムの作製方法において、記録層が形成
された基材の反対面に光吸収材料を有する反射防止層を
設けて露光する段階と、該反射防止層を除去し、光透過
性の高い反射防止層を設ける段階とからなるホログラム
の作製方法。(1) In a method for producing a hologram in which interference fringes are recorded by entering information light and reference light from the recording layer side, an antireflection layer containing a light-absorbing material is provided on the opposite surface of the base material on which the recording layer is formed, and then exposed to light. A method for producing a hologram, comprising the steps of: removing the antireflection layer and providing an antireflection layer with high light transmittance.
屈折率にたいして±３％以内である請求項１記載のホロ
グラムの作製方法。(2) The method for producing a hologram according to claim 1, wherein the refractive index of the antireflection layer containing the light-absorbing material is within ±3% of the refractive index of the base material.
射防止層を使用した請求項１記載のホログラムの作製方
法。(3) The method for producing a hologram according to claim 1, wherein an antireflection layer containing a light-absorbing material that is easily peeled off from the base material is used.
の樹脂に光吸収材料を分散状ないし層状に設けた請求項
１記載のホログラムの作製方法。(4) The method for producing a hologram according to claim 1, wherein the antireflection layer having a light-absorbing material is a vinyl chloride-based resin and the light-absorbing material is provided in a dispersed or layered manner.
の樹脂に光吸収材料を分散状ないし層状に設けた請求項
１記載のホログラムの作製方法。(5) The method for producing a hologram according to claim 1, wherein the antireflection layer having a light-absorbing material is provided with the light-absorbing material dispersed or layered in a vinyl acetate resin.
と酢酸ビニル系の共重合体の樹脂に光吸収材料を分散状
ないし層状に設けた請求項１記載のホログラムの作製方
法。(6) The method for producing a hologram according to claim 1, wherein the antireflection layer having a light-absorbing material is provided with a light-absorbing material dispersed or layered in a vinyl chloride-vinyl acetate-based copolymer resin.
し、基材と光透過性材料を接着層で貼り合わせた請求項
１記載のホログラムの作製方法。(7) The method for producing a hologram according to claim 1, wherein an antireflection layer with high light transmittance is formed on the light transmittance material, and the base material and the light transmittance material are bonded together with an adhesive layer.
に対して±３％以内である請求項７記載のホログラムの
作製方法。(8) The method for producing a hologram according to claim 7, wherein the refractive index of the light-transmitting material and the adhesive layer is within ±3% of the refractive index of the base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26686988A JP2779179B2 (en) | 1988-10-22 | 1988-10-22 | Hologram fabrication method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26686988A JP2779179B2 (en) | 1988-10-22 | 1988-10-22 | Hologram fabrication method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02113287A true JPH02113287A (en) | 1990-04-25 |
| JP2779179B2 JP2779179B2 (en) | 1998-07-23 |
Family
ID=17436783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26686988A Expired - Fee Related JP2779179B2 (en) | 1988-10-22 | 1988-10-22 | Hologram fabrication method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2779179B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5453338A (en) * | 1992-03-31 | 1995-09-26 | Dai Nippon Printing Co., Ltd. | Hologram and method of and apparatus for producing the same |
| JP2002149044A (en) * | 2000-11-08 | 2002-05-22 | Dainippon Printing Co Ltd | Method of photographing transmission type hologram |
| US7244532B2 (en) * | 2002-10-07 | 2007-07-17 | Tdk Corporation | Holographic recording medium |
| JP4548754B2 (en) * | 1999-03-08 | 2010-09-22 | 大日本印刷株式会社 | Hologram photographing dry plate and image forming method using the same |
-
1988
- 1988-10-22 JP JP26686988A patent/JP2779179B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5453338A (en) * | 1992-03-31 | 1995-09-26 | Dai Nippon Printing Co., Ltd. | Hologram and method of and apparatus for producing the same |
| US5660954A (en) * | 1992-03-31 | 1997-08-26 | Dai Nippon Printing Co., Ltd. | Hologram and method of and apparatus for producing the same |
| US5985490A (en) * | 1992-03-31 | 1999-11-16 | Dai Nippon Printing Co., Ltd. | Hologram and method of and apparatus for producing the same |
| US6291109B1 (en) | 1992-03-31 | 2001-09-18 | Dai Nippon Printing Co., Ltd. | Hologram and method of and apparatus for producing the same |
| JP4548754B2 (en) * | 1999-03-08 | 2010-09-22 | 大日本印刷株式会社 | Hologram photographing dry plate and image forming method using the same |
| JP2002149044A (en) * | 2000-11-08 | 2002-05-22 | Dainippon Printing Co Ltd | Method of photographing transmission type hologram |
| US7244532B2 (en) * | 2002-10-07 | 2007-07-17 | Tdk Corporation | Holographic recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2779179B2 (en) | 1998-07-23 |
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