JPH01219783A - Holography reproducing device - Google Patents
Holography reproducing deviceInfo
- Publication number
- JPH01219783A JPH01219783A JP4434388A JP4434388A JPH01219783A JP H01219783 A JPH01219783 A JP H01219783A JP 4434388 A JP4434388 A JP 4434388A JP 4434388 A JP4434388 A JP 4434388A JP H01219783 A JPH01219783 A JP H01219783A
- Authority
- JP
- Japan
- Prior art keywords
- light
- medium
- interference fringe
- fringe pattern
- irradiation
- 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.)
- Pending
Links
- 238000001093 holography Methods 0.000 title description 6
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000001678 irradiating effect Effects 0.000 claims abstract description 7
- 238000002834 transmittance Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 10
- 238000003384 imaging method Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 230000001427 coherent effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000006089 photosensitive glass Substances 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- G03H1/0005—Adaptation of holography to specific applications
- G03H2001/0088—Adaptation of holography to specific applications for video-holography, i.e. integrating hologram acquisition, transmission and display
Landscapes
- Holo Graphy (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の属する技術分野）
本発明は、ホログラフィ手法により立体像を媒体上に再
生するホログラフィ再生装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical field to which the invention pertains) The present invention relates to a holographic reproduction device that reproduces a three-dimensional image on a medium using a holographic technique.
（従来の技術）
従来、ホログラフィにおいては記録媒体として写真乾板
を用い、この写真乾板に、撮影対象の物体から反射して
来た反射光と照明光源から直接束た参照光とが干渉して
出来た干渉縞パターンを記録し、再生時にはこの干渉縞
が記録された写真乾板に再生光を照射することによって
立体像を再生するのが通常であった。(Prior art) Conventionally, in holography, a photographic plate is used as a recording medium, and a photographic plate is created by the interference of the reflected light reflected from the object to be photographed and the reference light directly bundled from the illumination light source. Conventionally, a three-dimensional image is reproduced by recording an interference fringe pattern and, upon reproduction, by irradiating reproduction light onto a photographic plate on which the interference fringe has been recorded.
ところがこのような写真乾板を用いる従来のホログラフ
ィ手法では現像、定着、乾燥などの写真処理が必要であ
る。しかしながら写真処理には、種々の化学薬品による
処理や暗室などの設備が不可欠であり、所望の再生立体
像を得るまでに時間と手間がかかると言った欠点があっ
た。However, conventional holography techniques using such photographic plates require photographic processing such as development, fixing, and drying. However, photographic processing requires treatment with various chemicals and equipment such as a darkroom, and has the disadvantage that it takes time and effort to obtain a desired reproduced three-dimensional image.
また従来の写真乾板では一度露光してしまえば書換えが
できないと言う欠点もあった。Another disadvantage of conventional photographic plates is that they cannot be rewritten once they have been exposed.
（発明の目的）
本発明は上述した従来の記録媒体としての写真乾板によ
る欠点を解消し、この写真乾板とは異なる記録媒体を用
い、簡単な手段で立体像を再生することを目的とするも
のである。(Object of the Invention) The object of the present invention is to solve the above-mentioned drawbacks of the conventional photographic plate as a recording medium, and to reproduce a three-dimensional image by a simple means using a recording medium different from the photographic plate. It is.
（発明の構成）
（発明の特徴と従来技術との差異）
本発明は上記目的を達成するため、媒体に写真乾板を用
いずに、代りに照射された光の量に対して透過率２反射
率または位相のうち少なくとも１つが変化し、かつ光の
照射が止まると照射以前の状態に復帰する物質からなる
媒体を用いて、ホログラフィを再生することを最も主要
な特徴とする。(Structure of the Invention) (Characteristics of the Invention and Differences from the Prior Art) In order to achieve the above object, the present invention does not use a photographic plate as a medium, but instead has a transmittance of 2 reflections for the amount of irradiated light. The most important feature is that holography is reproduced using a medium made of a material that changes at least one of the rate or phase and returns to the state before the irradiation when the irradiation of light stops.
従来の技術とは、使用する媒体に写真乾板を用いず、上
記性質を有する媒体を用いた点が異なる。This method differs from the conventional technology in that a photographic plate is not used as the medium, but a medium having the above-mentioned properties is used.
（実施例）
第１図は本発明の第１の実施例の構成を示し、図におい
て、１は入射光に対し、透過率が変化し、かつ光の照射
が止まると照射以前の状態に復帰する媒体である。この
媒体の例としては、（１）サングラスや窓ガラスとして
既に実用化されている「フォトクロミックガラス」（文
献（ア）参照）、
（２）有機物である「スピロ−ピラン」や「フルギドｊ
など（文献（ア）参照）、
（３）非線形光学媒質として知られているＣｕＣＩ）あ
るいはＧ ａ Ａ ｓを用いた「光双安定素子」（文献
（イ）参照）、
などが知られている。(Example) Fig. 1 shows the configuration of the first embodiment of the present invention. In the figure, 1 indicates that the transmittance changes with respect to incident light, and when the light irradiation stops, it returns to the state before irradiation. It is a medium for Examples of this medium include (1) "photochromic glass," which has already been put into practical use as sunglasses and window glass (see literature (a)); (2) organic materials such as "spiropyran" and "fulgide
(See Reference (A)), (3) CuCI, which is known as a nonlinear optical medium), or an "optical bistable element" using GaAs (see Reference (B)). .
文献（ア）宮村他：″情報機能材料″、材料科学、Ｖｏ
ｌ、 １８、Ｎｏ、 １ （１９８１）文献（イ）稲葉
ｆＩＩＡ： “′光コンピュータ″、オーム社発行（１
９８５）
また、２はホログラフィの干渉縞パターンを投影する手
段、３は再生光を照射する手段である。Literature (a) Miyamura et al.: “Information Functional Materials”, Materials Science, Vo
l, 18, No. 1 (1981) Literature (a) Inaba fIIA: “'Optical Computer”, published by Ohmsha (1)
985) Further, 2 is a means for projecting a holographic interference fringe pattern, and 3 is a means for irradiating reproduction light.
上記ホログラフィの干渉縞パターンを投影する手段２と
しては、スライド投影法、映画の映写法、ビデオプロジ
ェクタ法、レーザービームによるスキャン法などがある
。Examples of the means 2 for projecting the holographic interference fringe pattern include a slide projection method, a movie projection method, a video projector method, and a scanning method using a laser beam.
以下にスライド投影法を例にとって説明すると、干渉縞
パターンは事前に従来のホログラフィ手法を用いて作成
し、これを写真機などでフィルムに撮影し、現像し、ス
ライドにしておく。そして、これの再生時には、この干
渉縞の写っているスライドをスライド投影機にかけて、
それが実像を結ぶ位置、すなわち通常はスクリーンが置
かれる位置に、スクリーンの代わりに前記物質からなる
媒体１を置く。すると当然、媒体１上に、干渉縞パター
ンが再生される。Taking the slide projection method as an example, the interference fringe pattern is created in advance using a conventional holography method, photographed on film using a camera, developed, and made into a slide. Then, when reproducing this, the slide showing the interference fringes is placed on a slide projector.
A medium 1 made of the above-mentioned material is placed instead of the screen at a position where it forms a real image, that is, at a position where a screen is normally placed. Naturally, then, an interference fringe pattern is reproduced on the medium 1.
ここで、スライド投影機のレンズの焦点距離や、レンズ
とスライドやスクリーンとの距離を変えることにより、
実像の大きさを拡大、縮小できるから、これらを適当な
値に選ぶことにより、媒体１の上に、干渉縞の間隔が光
の波長程度となるような細かい干渉縞を表示することが
できる。Here, by changing the focal length of the lens of the slide projector and the distance between the lens and the slide or screen,
Since the size of the real image can be enlarged or reduced, by selecting appropriate values for these, it is possible to display fine interference fringes on the medium 1 such that the spacing between the interference fringes is approximately the wavelength of light.
一方、媒体１には、再生光を照射する手段３から、再生
光も照射される。従って、媒体１上には、ホログラフィ
の干渉縞パターンを投影する手段２から来た光と、再生
光を照射する手段３から来た光とが、重畳されて表示さ
れる。On the other hand, the medium 1 is also irradiated with reproduction light from the means 3 for irradiating reproduction light. Therefore, on the medium 1, the light coming from the means 2 for projecting a holographic interference fringe pattern and the light coming from the means 3 for emitting reproduction light are displayed in a superimposed manner.
さて、媒体１の特性は種々ありうるが、ここでは、−例
としてその媒体の各点において照射された光の強度が弱
いうちはそのすべてを透過する、すなわち透明であるが
、強度が強くなると透過率が下がり不透明になる性質を
持つものを例に説明する。Now, the characteristics of the medium 1 can vary, but here, as an example, when the intensity of the light irradiated at each point on the medium is low, it transmits all of it, that is, it is transparent, but when the intensity increases, An example will be explained using a material that has the property of decreasing transmittance and becoming opaque.
投影手段２から投影された干渉縞パターンは光の強い部
分４と弱い部分Ｓが分布している。そのうち、投影手段
２からの光の強い部分４では、投影手段２カフ１らの光
と照射手段３からの光の和もやはり強くなるので、媒体
１は不透明になる。逆に投影手段２からの光の弱い部分
５では、投影手段２からの光と照射手段３からの光の和
も弱くなるので、媒体１は透明になる。The interference fringe pattern projected from the projection means 2 has a portion 4 where the light is strong and a portion S where the light is weak. In a portion 4 where the light from the projection means 2 is strong, the sum of the light from the cuff 1 of the projection means 2 and the light from the irradiation means 3 also becomes strong, so that the medium 1 becomes opaque. Conversely, in the portion 5 where the light from the projection means 2 is weak, the sum of the light from the projection means 2 and the light from the irradiation means 3 is also weak, so the medium 1 becomes transparent.
このようにして、スライド上の干渉縞パターンが、媒体
上の透過率の変化パターンに変換される。In this way, the fringe pattern on the slide is converted into a pattern of transmittance changes on the medium.
透過率が変化するということは、そこに光を遮断する物
質があって干渉縞パターンが記録されているのと同様の
効果があるから、従来のホログラフィと同様の原理によ
り、そこに照射された再生光によって、ホログラフィの
像が形成される。The change in transmittance has the same effect as if there is a substance blocking the light and an interference fringe pattern is recorded, so using the same principle as conventional holography, the light that is irradiated there A holographic image is formed by the reproduction light.
次に、投影手段２からの照射を止めると、照射手段３か
らの再生光の照射があっても、光の和は弱くなるので、
媒体１は透明な状態に復帰する。Next, when the irradiation from the projection means 2 is stopped, even if the reproduction light is irradiated from the irradiation means 3, the sum of the lights becomes weaker.
Media 1 returns to its transparent state.
この状態において投影手段２から次の干渉縞パターンを
照射すれば、媒体１に新たなホログラフィ干渉縞を形成
し、新たな再生像を得ることができる。以下同様にして
繰り返して使用可能である。In this state, if the next interference fringe pattern is irradiated from the projection means 2, new holographic interference fringes are formed on the medium 1, and a new reproduced image can be obtained. It can be used repeatedly in the same manner.
さらに、前記媒体１が波長依存性を有し、波長Ａの光の
強度が弱いうちは透明で、強くなると不透明になるが、
波長Ｂの光については反応しないとすれば（事実、例え
ば文献（つ）によれば、紫外線の照射により、可視領域
の透過率が変化し着色するフォトクロミックガラスの例
が示されており、紫外線の波長をＡ、可視光線の波長を
Ｂとすればこの例に該当する）、ホログラフィの干渉縞
パターンの投影手段２の光源の波長をＡとし、再生光の
照射手段３の光源の波長をＢとすればよく、この場合に
は再生光の強度が強くとも干渉縞パターンの形成に影響
を与えないので、再生光を強くして明るい再生像を得る
ことができる。Furthermore, the medium 1 has wavelength dependence; it is transparent while the intensity of the light of wavelength A is weak, and becomes opaque when it becomes strong;
Assuming that it does not react with light of wavelength B (in fact, for example, according to literature, there is an example of photochromic glass that changes its transmittance in the visible region and becomes colored when irradiated with ultraviolet rays; This example applies if the wavelength is A and the wavelength of visible light is B), the wavelength of the light source of the holographic interference fringe pattern projection means 2 is A, and the wavelength of the light source of the reproduction light irradiation means 3 is B. In this case, even if the intensity of the reproduction light is strong, it will not affect the formation of the interference fringe pattern, so a bright reproduced image can be obtained by increasing the intensity of the reproduction light.
次に、投影手段２からの照射を止めると、照射手段３か
らの再生光の照射があっても、光の和は弱くなるので、
媒体１は透明な状態に復帰する。Next, when the irradiation from the projection means 2 is stopped, even if the reproduction light is irradiated from the irradiation means 3, the sum of the lights becomes weaker.
Media 1 returns to its transparent state.
この状態において投影手段２から次の干渉縞パターンを
照射すれば、媒体１に新たなホログラフィ干渉縞を形成
し、新たな再生像を得ることができる。以下同様にして
繰り返して使用が可能である。In this state, if the next interference fringe pattern is irradiated from the projection means 2, new holographic interference fringes are formed on the medium 1, and a new reproduced image can be obtained. It can be used repeatedly in the same manner.
さらに、文献（つ）によれば、短波長領域の光の照射に
よって暗化（着色＝不透明化）し、長波長領域の光の照
射によって退色（＝透明化）するフォトクロミックガラ
スも知られている。媒体１としてこの物質を用い、投影
手段２の光源の波長を短波長領域に設定し、さらにこれ
とは別に、媒体１に長波長領域の光を照射する光源（以
下これをリセット光源と称す）を用意し、投影手段２か
らの照射を止めた後に前記リセット光源から光を照射す
れば、媒体１が透明状態に復帰するのに要する時間を一
層短縮することが可能となる。Furthermore, according to literature, there is also known photochromic glass that darkens (colors = becomes opaque) when irradiated with light in the short wavelength range, and fades (= becomes transparent) when irradiated with light in the long wavelength range. . This material is used as the medium 1, the wavelength of the light source of the projection means 2 is set to a short wavelength region, and a light source (hereinafter referred to as a reset light source) that irradiates the medium 1 with light in a long wavelength region is provided. By preparing the medium 1 and irradiating light from the reset light source after stopping the irradiation from the projection means 2, it becomes possible to further shorten the time required for the medium 1 to return to the transparent state.
文献（つ）作花二パ感光ガラス材料″、化学総説「無機
光化学Ｊ 、Ｎｏ、 ３９、Ｐ２Ｏ７、日本化学会線（
１９８３）
第２図は本発明の第２の実施例の構成を示し、図におい
て、１０１はコヒーレントな光源、１０２は撮像対象物
体、１０３はスクリーン、１０４は撮像対象物体１０２
からの反射光、１０５はコヒーレントな光源１０１から
照射される参照光、１０６はスクリーン１０３上に表示
された干渉縞パターン、１０７はＴＶカメラなどの撮像
手段、１０８は投影手段２へ干渉縞パターン１０６を送
る伝送路、投影手段２の１０９はＣＲＴなどの表示手段
、１１０は表示された干渉縞パターン、１１１は結像レ
ンズなどの結像系、媒体１の１１２はこの媒体上に再生
表示された干渉縞パターンである。References (1) "Nipah Photosensitive Glass Materials", Chemistry Review "Inorganic Photochemistry J, No. 39, P2O7, Chemical Society of Japan Line (
1983) FIG. 2 shows the configuration of a second embodiment of the present invention, in which 101 is a coherent light source, 102 is an object to be imaged, 103 is a screen, and 104 is an object to be imaged 102
105 is the reference light emitted from the coherent light source 101, 106 is the interference fringe pattern displayed on the screen 103, 107 is an imaging means such as a TV camera, and 108 is the interference fringe pattern 106 to the projection means 2. 109 of projection means 2 is a display means such as a CRT, 110 is a displayed interference fringe pattern, 111 is an imaging system such as an imaging lens, and 112 of medium 1 is a display means reproduced on this medium. This is an interference fringe pattern.
これは、伝送路１０８を用いて撮像対象物体の干渉縞パ
ターン１０６を離れた位置の媒体１に干渉縞パターン１
１２として表示する場合である。This is done by using the transmission path 108 to transfer the interference fringe pattern 106 of the object to be imaged to the medium 1 at a remote position.
This is the case where it is displayed as 12.
次に本実施例の動作について説明すると、コヒーレント
な光源１０１から出た光は、撮像対象物体１０２にあた
って反射しスクリーン１０３に入る反射光１０４と、直
接スクリーン１０３に入る参照光１０５となって、スク
リーン１０３上で干渉し、干渉縞パターン１０６を形成
する。この干渉縞パターン１０６を、例えばＴＶカメラ
などで代表される撮像手段１０７で撮像しく必要に応じ
て行う拡大、縮小処理を含む）、それを伝送路１０８を
介して受信側に伝送する。Next, to explain the operation of this embodiment, the light emitted from the coherent light source 101 is reflected by the object to be imaged 102 and becomes reflected light 104 which enters the screen 103, and reference light 105 which directly enters the screen 103. 103 to form an interference fringe pattern 106. This interference fringe pattern 106 is imaged by an imaging means 107 typified by, for example, a TV camera (including enlargement and reduction processing performed as necessary) and transmitted to the receiving side via a transmission path 108.
受信側では、ＣＲＴなどで代表される表示手段１０９で
、前記干渉縞パターン１０６に相当する干渉縞パターン
１１０を受信再現し、これを結像系１１１で媒体１上に
結像させる（必要に応じて行う拡大、縮小処理を含む）
。以下は第１の実施例と同様の原理により、媒体１上に
干渉縞パターン１１０に相当する干渉縞パターン１１２
を形成する。ここにおいて、再生光の照射手段３によっ
て再生光を前記媒体１に照射すれば、送信側の撮像物体
１０２に対応する立体再生像を受信側で再生することが
できる。On the receiving side, a display means 109 such as a CRT receives and reproduces an interference fringe pattern 110 corresponding to the interference fringe pattern 106, and an imaging system 111 forms an image of this on the medium 1 (as necessary). (including enlargement and reduction processing performed by
. In the following, an interference fringe pattern 110 corresponding to the interference fringe pattern 110 is formed on the medium 1 using the same principle as in the first embodiment.
form. Here, if the medium 1 is irradiated with reproduction light by the reproduction light irradiation means 3, a three-dimensional reproduction image corresponding to the imaging object 102 on the transmitting side can be reproduced on the receiving side.
次に、表示手段１０９からの照射を止めると、照射手段
３からの再生光の照射があっても、光の和は弱くなるの
で、媒体１は透明な状態に復帰する。Next, when the irradiation from the display means 109 is stopped, even if the reproduction light is irradiated from the irradiation means 3, the sum of the lights becomes weaker, so that the medium 1 returns to its transparent state.
この状態において表示手段１０９から次の干渉縞パター
ンを照射すれば、媒体１に新たなホログラフィ干渉縞を
形成し、新たな再生像を得ることができる。以下同様に
して繰り返して使用が可能である。従って、静止画のみ
ならず動画の立体像を実時間で遠隔地に送ることができ
る。In this state, if the next interference fringe pattern is emitted from the display means 109, new holographic interference fringes are formed on the medium 1, and a new reproduced image can be obtained. It can be used repeatedly in the same manner. Therefore, not only still images but also moving stereoscopic images can be sent to remote locations in real time.
なお、ここでいう表示手段１０９と結像系１１１とが、
第１の実施例でいうところのホログラフィの干渉縞パタ
ーンを投影する手段２に相当する。Note that the display means 109 and the imaging system 111 here are
This corresponds to the means 2 for projecting a holographic interference fringe pattern in the first embodiment.
また、第２の実施例の送信側において、光源１０１から
撮像手段１０７までをコンピュータに置き換えて、演算
処理によって干渉縞パターンを発生させ、これを伝送路
１０８を介して受信側に伝送すれば、人工的に合成され
た立体像を、必要ならば動画として、再生することも可
能である。Furthermore, on the transmitting side of the second embodiment, if everything from the light source 101 to the imaging means 107 is replaced with a computer, an interference fringe pattern is generated through arithmetic processing, and this is transmitted to the receiving side via the transmission line 108. It is also possible to reproduce an artificially synthesized stereoscopic image as a moving image if necessary.
以上、第１および第２の実施例ではすべて媒体１が入射
光に対し「透過率」が変化する場合を例にとって説明し
たが、「反射率」が変化してもよいし、「位相」が変化
してもよいことはもちろんである。In the first and second embodiments above, the case where the "transmittance" of the medium 1 changes with respect to the incident light has been explained as an example, but the "reflectance" may also change, and the "phase" may change. Of course, it may change.
（発明の効果）
以上説明したように、本発明においては、ホログラフィ
の媒体として照射された光の量に対して透過率９反射率
または位相のうち少なくとも一つが変化しかつ光の照射
が止まると照射以前の状態に復帰する媒体が使用されて
いるので、現像などの写真処理を行うことなく直ちに像
を再生することが可能であるとともに、繰り返して使用
が可能となる。従って、煩雑な写真処理を省くことがで
きるだけでなく、動画立体像の再生や電気通信手段によ
る伝送も可能となる利点がある。(Effects of the Invention) As explained above, in the present invention, at least one of transmittance, reflectance, or phase changes with respect to the amount of light irradiated as a holographic medium, and when the light irradiation stops. Since a medium is used that returns to the state before irradiation, the image can be immediately reproduced without any photographic processing such as development, and can be used repeatedly. Therefore, there is an advantage that not only can complicated photographic processing be omitted, but also that moving stereoscopic images can be reproduced and transmitted by telecommunication means.
第１図は本発明の第１の実施例の構成図、第２図は本発
明の第２の実施例の構成図である。
１ ・・・媒体、２ ・・・ホログラフィの干渉縞を投
影する手段、３ ・・再生光を照射する手段、４ ・・
光の強い部分、５ ・・・光の弱い部分、１０１・・・
光源、１０２・・・撮像対象物体、１０３・・・スクリ
ーン、１０４・・反射光、１０５・・・参照光、１０６
，１１０，１１２・・干渉縞パターン、１０７ ・・
撮像手段、１０８− 伝送路、１０９・・表示手段、
１１１・ 結像系。
特許出願人 日本電信電話株式会社FIG. 1 is a block diagram of a first embodiment of the present invention, and FIG. 2 is a block diagram of a second embodiment of the present invention. 1... Medium, 2... Means for projecting holographic interference fringes, 3... Means for irradiating reproduction light, 4...
Area with strong light, 5... Area with weak light, 101...
Light source, 102... Object to be imaged, 103... Screen, 104... Reflected light, 105... Reference light, 106
, 110, 112... interference fringe pattern, 107...
Imaging means, 108- transmission line, 109...display means,
111. Imaging system. Patent applicant Nippon Telegraph and Telephone Corporation
Claims (1)
うち少なくとも１つが変化し、かつ光の照射が止まると
照射以前状態に復帰する物質からなる媒体と、該媒体に
ホログラフィの干渉縞パターンを投影する手段と、前記
媒体に再生光を照射する手段とを具備したことを特徴と
するホログラフィ再生装置。A medium made of a material that changes at least one of transmittance, reflectance, or phase with respect to the amount of irradiated light and returns to the state before irradiation when the light irradiation stops, and a holographic interference pattern on the medium. A holographic reproduction device comprising: means for projecting a pattern; and means for irradiating reproduction light onto the medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4434388A JPH01219783A (en) | 1988-02-29 | 1988-02-29 | Holography reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4434388A JPH01219783A (en) | 1988-02-29 | 1988-02-29 | Holography reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01219783A true JPH01219783A (en) | 1989-09-01 |
Family
ID=12688868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4434388A Pending JPH01219783A (en) | 1988-02-29 | 1988-02-29 | Holography reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01219783A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013136358A1 (en) * | 2012-03-12 | 2013-09-19 | Empire Technology Development Llc | Holographic image reproduction mechanism using ultraviolet light |
-
1988
- 1988-02-29 JP JP4434388A patent/JPH01219783A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013136358A1 (en) * | 2012-03-12 | 2013-09-19 | Empire Technology Development Llc | Holographic image reproduction mechanism using ultraviolet light |
| US9019584B2 (en) | 2012-03-12 | 2015-04-28 | Empire Technology Development Llc | Holographic image reproduction mechanism using ultraviolet light |
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