JPH0522911B2 - - Google Patents
Info
- Publication number
- JPH0522911B2 JPH0522911B2 JP61199396A JP19939686A JPH0522911B2 JP H0522911 B2 JPH0522911 B2 JP H0522911B2 JP 61199396 A JP61199396 A JP 61199396A JP 19939686 A JP19939686 A JP 19939686A JP H0522911 B2 JPH0522911 B2 JP H0522911B2
- Authority
- JP
- Japan
- Prior art keywords
- hologram
- reproduction
- light source
- light
- reproduced
- 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.)
- Expired - Lifetime
Links
- 230000001678 irradiating effect Effects 0.000 claims 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
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
- G03H1/28—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique superimposed holograms only
-
- 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
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2286—Particular reconstruction light ; Beam properties
-
- 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
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2249—Holobject properties
-
- 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
- G03H1/0011—Adaptation of holography to specific applications for security or authentication
- G03H2001/0016—Covert holograms or holobjects requiring additional knowledge to be perceived, e.g. holobject reconstructed only under IR illumination
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/0402—Recording geometries or arrangements
- G03H2001/0415—Recording geometries or arrangements for recording reflection holograms
- G03H2001/0417—Recording geometries or arrangements for recording reflection holograms for recording single beam Lippmann hologram wherein the object is illuminated by reference beam passing through the recording material
-
- 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
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2202—Reconstruction geometries or arrangements
- G03H2001/2223—Particular relationship between light source, hologram and observer
- G03H2001/2231—Reflection reconstruction
-
- 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
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2249—Holobject properties
- G03H2001/2281—Particular depth of field
-
- 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
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
- G03H1/2645—Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing
- G03H2001/2665—Coherence multiplexing wherein different holobjects are perceived under coherent or incoherent illumination
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2210/00—Object characteristics
- G03H2210/30—3D object
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2210/00—Object characteristics
- G03H2210/30—3D object
- G03H2210/32—3D+2D, i.e. composition of 3D and 2D sub-objects, e.g. scene in front of planar background
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2210/00—Object characteristics
- G03H2210/50—Nature of the object
- G03H2210/52—Alphanumerical
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2222/00—Light sources or light beam properties
- G03H2222/20—Coherence of the light source
- G03H2222/22—Spatial coherence
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2222/00—Light sources or light beam properties
- G03H2222/20—Coherence of the light source
- G03H2222/24—Low coherence light normally not allowing valuable record or reconstruction
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2222/00—Light sources or light beam properties
- G03H2222/34—Multiple light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2227/00—Mechanical components or mechanical aspects not otherwise provided for
- G03H2227/05—Support holding the holographic record
- G03H2227/06—Support including light source
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Holo Graphy (AREA)
Description
（産業上の利用分野）
本発明は、ホログラムの再生方法に関し、さら
に詳しくは二種類の光源を切り換え使用すること
により、ホログラムの像の再生の程度を変化さ
せ、再生像を変化させることの可能な、たとえば
デイスプレー用ホログラムの再生方法に好適な再
生方法に関する。
（従来の技術）
ホログラムは、立体像を記録し、再生する上で
極めて有効な手段であり、その応用分野も種々検
討され、たとえばデイスプレー、装飾品等として
利用され始めている。
（発明が解決しようとする問題点）
このようなホログラムをデイスプレーとして用
いる場合、単に再生光の照射により立体像が再生
されるということに加えて、再生像が変化するこ
とが、デイスプレーとして必要な意外性を与え、
また広告効果を増大する上で好ましいが、単一の
ホログラムを使用して、ホログラムから異なる再
生像を再生させるという再生方法が現実化してい
ないのが現状である。
（問題点を解決するための手段）
本発明は、上述の点を考慮してなされたもので
あり、二種類の再生光源を組合わせることにより
異なる再生像を再生することの可能なホログラム
の再生方法を提供することを目的とする。
すなわち、本発明のホログラムの再生方法は、
ホログラムに再生光源からの再生光を照射するこ
とにより、ホログラムに記録された再生像を再生
する方法において、遠距離撮影により記録された
像と近距離撮影により記録された像を有するホロ
グラムに、再生光源としての点光源と散乱光源を
切り換え使用して、異なる再生光を照射すること
により、各再生光に対応した異なる再生像を再生
することを特徴とする。
本発明の方法によりホログラムを再生する場
合、点光源からの光を再生光として照射すれば、
遠距離撮影により記録された像と近距離撮影によ
り記録された像の２つの像が再生され、散乱光源
からの光を再生光として照射すれば、遠距離撮影
により記録された像のみが再生されることとな
り、したがつて、これら二種類の光源を切り替え
使用することにより、再生像を変化させることが
できる。
本発明の再生方法に使用可能なホログラムとし
ては、たとえば、リツプマンホログラム、レーザ
ー再生ホログラム（ここではレーザーのみで再生
可能なホログラムの意味で用いる）、イメージプ
レンホログラム、レインボーホログラム等があ
る。また、再生光源は、点光源としては、白色点
光源（太陽光、電球、懐中電灯など）、レーザー
光源等が使用され、散乱光源としては、蛍光灯ま
たは点光源からの光を光散乱板等に通過させて得
られる光等が使用することができる。ここで、点
光源と散乱光源の組合わせは、使用するホログラ
ムにより若干異なり次表の組合わせが好ましい。
(Industrial Application Field) The present invention relates to a method for reproducing a hologram, and more specifically, by switching and using two types of light sources, it is possible to change the degree of reproduction of a hologram image and change the reproduced image. In particular, the present invention relates to a reproduction method suitable for, for example, a reproduction method of a display hologram. (Prior Art) Holograms are an extremely effective means for recording and reproducing three-dimensional images, and various fields of application have been studied, and they have begun to be used, for example, as displays, ornaments, and the like. (Problems to be Solved by the Invention) When such a hologram is used as a display, in addition to simply reproducing a three-dimensional image by irradiation with reproduction light, it is also important that the reproduced image changes. Give the necessary surprise,
In addition, although this is preferable in terms of increasing advertising effectiveness, the current situation is that a reproduction method in which a single hologram is used and different reproduced images are reproduced from the hologram has not been realized. (Means for Solving the Problems) The present invention has been made in consideration of the above points, and provides reproduction of a hologram that can reproduce different reproduced images by combining two types of reproduction light sources. The purpose is to provide a method. That is, the hologram reproduction method of the present invention is as follows:
In a method of reproducing a reproduced image recorded on a hologram by irradiating the hologram with reproduction light from a reproduction light source, a hologram having an image recorded by long-distance photography and an image recorded by close-range photography is reproduced. The present invention is characterized in that by selectively using a point light source and a scattered light source as a light source and irradiating different reproduction lights, different reproduction images corresponding to each reproduction light are reproduced. When reproducing a hologram using the method of the present invention, if light from a point light source is irradiated as reproduction light,
Two images, one recorded by long-distance photography and one recorded by close-range photography, are reproduced, and if the light from the scattered light source is irradiated as reproduction light, only the image recorded by long-distance photography is reproduced. Therefore, by switching between these two types of light sources, the reproduced image can be changed. Examples of holograms that can be used in the reproduction method of the present invention include Lippmann holograms, laser reproduction holograms (herein used to mean holograms that can be reproduced only by laser), image plane holograms, and rainbow holograms. In addition, as a point light source, a white point light source (sunlight, light bulb, flashlight, etc.), laser light source, etc. is used as a point light source, and as a scattering light source, light from a fluorescent lamp or a point light source is used, such as a light scattering plate, etc. The light obtained by passing the light can be used. Here, the combinations of the point light source and the scattered light source vary slightly depending on the hologram used, and the combinations shown in the following table are preferred.
【表】
また、ホログラムの再生のために散乱光源は、
上述のように点光源からの光を光散乱板等を通過
させることにより得られるので、同一点光源、た
とえば白熱電灯を点光源として用いるとともに、
その光源と光散乱板との組合わせを散乱光源とし
て用いることも可能であり、本発明の範囲内にあ
るものとする。
以下、本発明の一実施例について図面を参照し
つつ更に具体的に説明する。
第１図は、ホログラムとしてリツプマン型ホロ
グラムを使用した場合の本発明の再生方法の例を
概念的に例示する図である。
基板１の上に設置されたリツプマン型ホログラ
ム２を、該ホログラム２の記録面に照射可能に、
支持棒５を介して基板１に固定してなる、それぞ
れの点滅構造により連結されている白熱電灯３
（点光源）および蛍光灯４（散乱光源）が、点滅
構造により再生光を切り換え照射することによ
り、各再生光に対応したホログラムの再生像が再
生される。
本発明の再生方法により再生すべきホログラム
の記録像は遠近感のあるものであれば任意である
が、効果的な意外性のある再生像を得るために
は、たとえば同一単光軸撮影方によるリツプマン
型ホログラムの撮影について、第２図および第３
図に示すようにして撮影記録した、不連続な二被
写体像を記録するホログラムが好ましく用いられ
る。すなわち、第２図に示すように、感光材料６
の背後にこれに近接して被写体７（花）を置いて
前面よりレーザー光８を照射して撮影する。これ
により感光材料６上では前面からのレーザー８を
参照光とし、裏面の被写体７からの反射光を物体
光とする干渉縞が記録される。また、同様に第３
図に示すように、引続き第２図の方法により撮影
記録された同一の感光材料６の背後に離間して被
写体９（“FLOWER”の文字の表示板）を設け、
レーザー光を前面より照射して撮影記録を行う。
なお、ホログラムの撮影は上記のように二重露
光によらず第２図および第３図の被写体７，９を
組合わせて、一度の露光で撮影しても、ほぼ同様
な記録像を有するホログラムが得られる。
このようにして撮影記録の済んだ感光材料６に
ついて、現像灯の後処理をして得られたホログラ
ムを、第１図に示す本発明の方法により再生する
場合、白熱電灯３でホログラム２を照射する場合
には、被写体７および９（第２図および第３図）
の双方の像が鮮明に看取することができるのに対
し、蛍光灯４でホログラム２を照射した場合に
は、記録面近傍の被写体７のみが再生され、離間
した被写体９はぼけて見えなくなる。したがつて
２つの光源３および４の点滅により同一のホログ
ラムから異なる再生像が得られ、意外性ならびに
第２図および第３図で示した被写体を記録する場
合のように教育的なデイスプレーとしての使用も
可能となる。
本発明の再生方法に使用されるホログラムはリ
ツプマン型ホログラムに限られず、他のホログラ
ムも使用可能であり、その場合には前述した適当
な光源の組合わせを適宜使用すればよい。また、
第２図ないし第３図について説明した反射再生型
のホログラムでなく、光透過再生型のホログラム
については、再生光源をホログラムの後方に設置
することにより同様の効果が得られるのはもちろ
んである。
（発明の効果）
本発明のホログラムの再生方法を使用すれば、
二種類のホログラムを使用することなく単一のホ
ログラムから、像が記録さている距離に応じて、
つまりその再生光による像のボケ具合が異なるの
を利用して遠距離撮影により記録された像と近距
離撮影により記録された像を再生し、極めて高い
意外性とデイスプレーとしての広告効果が得られ
る。また、ホログラムに記録する被写体を選ぶこ
とにより教育的なデイスプレーとしての効果も得
ることができる。[Table] In addition, for hologram reproduction, the scattering light source is
As mentioned above, light from a point light source can be obtained by passing it through a light scattering plate, etc., so the same point light source, for example, an incandescent electric lamp, can be used as a point light source, and
It is also possible to use a combination of the light source and the light scattering plate as a scattering light source, which is within the scope of the present invention. Hereinafter, one embodiment of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a diagram conceptually illustrating an example of the reproduction method of the present invention when a Lippmann hologram is used as the hologram. A Lippmann hologram 2 placed on the substrate 1 can be irradiated onto the recording surface of the hologram 2,
Incandescent electric lamps 3 fixed to the substrate 1 via support rods 5 and connected by respective blinking structures.
(point light source) and the fluorescent lamp 4 (scattered light source) switch and emit reproduction light using a blinking structure, thereby reproducing a reproduced image of the hologram corresponding to each reproduction light. The recorded image of the hologram to be reproduced by the reproduction method of the present invention can be any image as long as it has a sense of perspective, but in order to obtain an effective and unexpected reproduced image, it is necessary to use, for example, the same single optical axis photography method. Figures 2 and 3 regarding the imaging of Lippmann holograms.
A hologram that records two discontinuous subject images photographed and recorded as shown in the figure is preferably used. That is, as shown in FIG.
A subject 7 (flower) is placed behind and close to the subject, and a laser beam 8 is irradiated from the front to photograph the subject. As a result, interference fringes are recorded on the photosensitive material 6 in which the laser 8 from the front side is used as a reference beam and the reflected light from the object 7 on the back side is used as an object beam. Similarly, the third
As shown in the figure, a subject 9 (a display board with the letters "FLOWER") is placed at a distance behind the same photosensitive material 6 that was photographed and recorded by the method shown in FIG.
Photography and recording are performed by irradiating laser light from the front. Note that even if the hologram is photographed by combining the objects 7 and 9 in FIGS. 2 and 3 in a single exposure, instead of using double exposure as described above, a hologram with almost the same recorded image will be obtained. is obtained. When reproducing a hologram obtained by post-processing the photosensitive material 6 photographed and recorded using a developing lamp by the method of the present invention shown in FIG. 1, the hologram 2 is irradiated with an incandescent lamp 3. If so, subjects 7 and 9 (Figures 2 and 3)
Both images can be seen clearly, whereas when the hologram 2 is illuminated with a fluorescent lamp 4, only the object 7 near the recording surface is reproduced, and the object 9 further away becomes blurry and invisible. . Therefore, by blinking the two light sources 3 and 4, different reconstructed images are obtained from the same hologram, which can be used both as a surprise and as an educational display, as in the case of recording the objects shown in FIGS. 2 and 3. It is also possible to use The hologram used in the reproduction method of the present invention is not limited to the Lippmann type hologram, but other holograms can also be used, and in that case, the above-mentioned combination of appropriate light sources may be used as appropriate. Also,
Of course, for a light transmission reproduction type hologram instead of the reflection reproduction type hologram explained with reference to FIGS. 2 and 3, the same effect can be obtained by installing the reproduction light source behind the hologram. (Effect of the invention) If the hologram reproduction method of the invention is used,
From a single hologram without using two types of holograms, depending on the distance at which the image is recorded,
In other words, by taking advantage of the difference in the degree of blurring of the image due to the reproduction light, we can reproduce the image recorded by long-distance photography and the image recorded by close-range photography, resulting in an extremely unexpected and advertising effect as a display. It will be done. Furthermore, by selecting the subject to be recorded on the hologram, it can also be used as an educational display.
第１図は本発明のホログラムの再生方法の一例
を示す図、第２図および第３図は、本発明の再生
方法により再生する記録像を有するホログラムの
撮影工程を説明するための概念図である。
１……基板、２……ホログラム、３……白熱電
灯、４……蛍光灯、６……感光材料、７……近接
被写体、８……レーザー光、９……離間被写体。
FIG. 1 is a diagram showing an example of the hologram reproduction method of the present invention, and FIGS. 2 and 3 are conceptual diagrams for explaining the photographing process of a hologram having a recorded image to be reproduced by the reproduction method of the present invention. be. 1...Substrate, 2...Hologram, 3...Incandescent lamp, 4...Fluorescent lamp, 6...Photosensitive material, 7...Proximity subject, 8...Laser light, 9...Distant subject.
Claims (1)
ることにより、ホログラムに記録された再生像を
再生する方法において、遠距離撮影により記録さ
れた像と近距離撮影により記録された像を有する
ホログラムに、再生光源としての点光源と散乱光
源を切り換え使用して、異なる再生光を照射する
ことにより、各再生光に対応した異なる再生像を
再生することを特徴とするホログラムの再生方
法。1. In a method of reproducing a reproduced image recorded on a hologram by irradiating the hologram with reproduction light from a reproduction light source, a hologram having an image recorded by long-distance photography and an image recorded by close-range photography, A method for reproducing a hologram, characterized in that a point light source and a scattered light source are selectively used as a reproduction light source, and different reproduction lights are irradiated to reproduce different reproduction images corresponding to each reproduction light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19939686A JPS6263983A (en) | 1986-08-26 | 1986-08-26 | Reconstructing method for hologram |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19939686A JPS6263983A (en) | 1986-08-26 | 1986-08-26 | Reconstructing method for hologram |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6263983A JPS6263983A (en) | 1987-03-20 |
| JPH0522911B2 true JPH0522911B2 (en) | 1993-03-31 |
Family
ID=16407088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19939686A Granted JPS6263983A (en) | 1986-08-26 | 1986-08-26 | Reconstructing method for hologram |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6263983A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8818048D0 (en) * | 1988-07-28 | 1988-09-01 | Crouch & Webster Technologies | Display of holograms |
| KR100377883B1 (en) | 1997-03-18 | 2003-03-29 | 마쯔시다덴기산교 가부시키가이샤 | Optical display |
| US7576898B2 (en) * | 2004-02-17 | 2009-08-18 | E. I. Du Pont De Nemours And Company | Method for using a deep image hologram as a security device and a deep image hologram |
| GB2592051A (en) * | 2020-02-14 | 2021-08-18 | Iq Structures Sro | Display panel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5451540A (en) * | 1977-09-30 | 1979-04-23 | Fuji Photo Optical Co Ltd | Method and apparatus for reconstruction of holograms |
-
1986
- 1986-08-26 JP JP19939686A patent/JPS6263983A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5451540A (en) * | 1977-09-30 | 1979-04-23 | Fuji Photo Optical Co Ltd | Method and apparatus for reconstruction of holograms |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6263983A (en) | 1987-03-20 |
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