JPH02173782A - Holographic display device - Google Patents
Holographic display deviceInfo
- Publication number
- JPH02173782A JPH02173782A JP33011288A JP33011288A JPH02173782A JP H02173782 A JPH02173782 A JP H02173782A JP 33011288 A JP33011288 A JP 33011288A JP 33011288 A JP33011288 A JP 33011288A JP H02173782 A JPH02173782 A JP H02173782A
- Authority
- JP
- Japan
- Prior art keywords
- photosensitive material
- light
- scattering plate
- hologram
- exposure
- 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
- 239000000463 material Substances 0.000 claims abstract description 23
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 230000004907 flux Effects 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000005337 ground glass Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
- Optical Elements Other Than Lenses (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- 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シートを利用した表示装置に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device using a hologram sheet.
従来、ホログラフィック表示装置として、参照光と物体
光で記録されたホログラムに光を照射して物体像を表示
するもの、あるいはヘッドアップデイスプレィ用のコン
バイナーなど、反射型ホログラムに表示情報を照射し、
反射させることによって表示するものが知られている。Conventionally, holographic display devices display an object image by irradiating a hologram recorded with a reference beam and object beam, or display information is irradiated onto a reflective hologram, such as a combiner for a head-up display. ,
It is known to display images by reflecting them.
しかしながら、従来の表示装置は、前者にあってはホロ
グラムに記録された物体像以外には表示することができ
ず、後者にあっては視認できる範囲が表示情報を照射す
るためのプロジェクタ−側の極めて狭い範囲に限定され
てしますなどの欠点があった。However, in the former case, conventional display devices cannot display anything other than the object image recorded in the hologram, and in the latter case, the visible range is on the projector side for illuminating display information. It had drawbacks such as being limited to an extremely narrow range.
本発明はこのような点に鑑みてなされたもので、プロジ
ェクタ−から投射される各種の情報を表示することがで
のるばかりでなく、非常に広い範囲から視認可能な新規
のホログラフィック表示装置を提供することを目的とす
る。The present invention has been made in view of these points, and provides a novel holographic display device that is not only capable of displaying various types of information projected from a projector, but also visible from a very wide range. The purpose is to provide
本発明のホログラフィック表示装置は、感材の両側から
、一方は参照光として、他方は、感材に近接して配置す
るか、感材との間を微小光路束で接続した散乱板を介し
て物体光として照射し、干渉縞を記録したホログラムシ
ートに、プロジェクタ−から表示情報を投射するように
したことを特徴とするものである。In the holographic display device of the present invention, one beam is used as a reference beam from both sides of the sensitive material, and the other beam is placed close to the sensitive material or via a scattering plate connected to the sensitive material by a minute optical path flux. The present invention is characterized in that display information is projected from a projector onto a hologram sheet on which interference fringes are recorded by irradiating the hologram sheet with object light.
露光時に感材の両側からレーザー光を照射してホログラ
ムを記録するに際して、物体光として、感材に近接して
配置するか、感材から＃ｌ隔させて配置する場合には感
材との間を微小光路束で接続した散乱板を介して照射さ
せることにより、散乱板の各微小エリアを透過した散乱
光が、これらの微小エリアに１：１で対応する、例えば
散乱板の各微小エリアの法線が交わる感材の微小エリア
に入射するので、散乱板像がホログラムとして記録され
るとともに、再生時に、露光時のレーザー光の波長に近
い光源（１次光源）を有するプロジェクタ−から表示情
報をホログラムシートに投射すると、露光時の散乱板の
共役位置、すなわち、感材（ホログラム）に対して対称
な位置に、散乱板像全体ではなく表示情報のみが結像し
、反射像としてではなく２次光源として作用するので、
プロジェクタ−側だけでなく、反対側においても非常に
広い＠囲から表示情報が視認されうる。When recording a hologram by irradiating a laser beam from both sides of the photosensitive material during exposure, the object beam is placed close to the photosensitive material, or when placed at a distance of #1 from the photosensitive material, it is used as an object beam. By irradiating the light through a scattering plate connected by a minute optical path flux, the scattered light transmitted through each minute area of the scattering plate corresponds 1:1 to each minute area of the scattering plate, for example, each minute area of the scattering plate. The scattering plate image is recorded as a hologram, and when reproduced, it is displayed from a projector having a light source (primary light source) close to the wavelength of the laser beam during exposure. When information is projected onto a hologram sheet, only the displayed information, not the entire scattering plate image, is formed at the conjugate position of the scattering plate at the time of exposure, that is, at a position symmetrical to the sensitive material (hologram), and it is not seen as a reflected image. Because it acts as a secondary light source,
Display information can be viewed from a very wide area not only on the projector side but also on the opposite side.
また、結像された表示情報部は露光時のレーザー光波長
近傍以外の波長の光を透過するので、背後の明るさ、表
示情報の明るさ等によって程度の差はあるが、表示情報
の背後も視認可能でなり、独自の表示装置として作用す
る。In addition, since the imaged display information section transmits light of a wavelength other than the wavelength of the laser light at the time of exposure, there are differences in degree depending on the brightness of the background, the brightness of the displayed information, etc. is also visible and acts as its own display device.
以下、図面を参照しながら本発明の詳細な説明する。 Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図、第２図は、それぞれ本発明のホログラフィック
表示装置に好適なホログラムシートを作製するための露
光光学系を示す平面図、第３図は再生時の実施例を示す
要部概略図である。1 and 2 are plan views showing an exposure optical system for producing a hologram sheet suitable for the holographic display device of the present invention, respectively, and FIG. 3 is a schematic diagram of main parts showing an embodiment during reproduction. It is.
１１史上
すりガラス等の散乱板を感材に例えば５０ｎ以内に近接
させて露光してホログラムシートを作製する例である。11 is an example in which a hologram sheet is prepared by exposing a light-sensitive material to a scattering plate such as ground glass within 50 nm, for example.
（ホログラムシート作ｍ１）
ポリエステルフィルム１上に感材２としての重クロム酸
ゼラチンを塗布して乾燥させたホログラム原板をインデ
ックスマツチング液を介して無反射ガラス３．３で挟持
して、第１図に示すような光学系により露光する。(Hologram sheet production m1) A hologram original plate prepared by coating dichromate gelatin as a photosensitive material 2 on a polyester film 1 and drying it is sandwiched between non-reflective glasses 3.3 through an index matching liquid. Exposure is performed using an optical system as shown in the figure.
５１４．５ｎａ＋の波長の緑色光を発振するレーザー４
−１．４５７．８ｎ−の波長の青色光を発振するレーザ
ー４−２．６４７． Ｉｎｓ＋の波長の赤色光を発振す
るレーザー４−３から同時に３原色のレーザー光をハー
フミラ−５−Ｌ ５−２．５−３を介して発振させ、ビ
ームスプリッタ６で２分割し、一方は反射ＩＪ ７、凸
レンズ８、凸レンズ９を介して参照光として、他方は反
射鏡ｌＯ１凸レンズ１１．散乱板１２を介して物体光と
して、それぞれ感材２を照射、その後通常の方法により
現像、定着処理を行ないホログラムシート１３を得る。Laser 4 that emits green light with a wavelength of 514.5na+
A laser 4-2.647. that emits blue light with a wavelength of -1.457.8n-. A laser 4-3 that emits red light with a wavelength of Ins+ simultaneously oscillates three primary color laser beams via a half mirror 5-L 5-2.5-3, which is split into two by a beam splitter 6, one of which is reflected. IJ 7, convex lens 8, and convex lens 9 as a reference light, and the other is a reflection mirror lO1 convex lens 11. The light-sensitive material 2 is irradiated with object light through the scattering plate 12, and then developed and fixed by a conventional method to obtain a hologram sheet 13.
（再生）
このようにして得られたホログラムシート１３を第３図
に示すように、例えば建築用窓ガラス１４に接着して屋
内に配置したプロジェクタ−１５により表示情報をホロ
グラムシート１３に投射すると、露光時の散乱板の共役
位置、すなわち屋外側の点線で示した位置に結像し、屋
内側はもとより、屋外側からも少なくとも、θ−６０°
の範囲内において表示像を目１６により、視認すること
ができ、同時に表示像の背後も併せて、視認することが
できた。(Reproduction) As shown in FIG. 3, the hologram sheet 13 thus obtained is glued to, for example, an architectural window glass 14 and display information is projected onto the hologram sheet 13 by a projector 15 placed indoors. The image is formed at the conjugate position of the scattering plate during exposure, that is, the position shown by the dotted line on the outdoor side, and the angle is at least θ-60° not only from the indoor side but also from the outdoor side.
It was possible to visually recognize the displayed image with the eyes 16 within the range of , and at the same time, it was also possible to visually recognize the area behind the displayed image.
ス」１辺」−
第２図に示すように、散乱板１２を感材２からＬ（鶴）
Ｉｌｌ隔させて、その間を光ファイバー等の微小光路束
１７で接続した以外は実施例１と同じ光学系により露光
し、その後現像・定着処理を行なってホログラムシート
を得る。- As shown in Figure 2, the scattering plate 12 is
Exposure is performed using the same optical system as in Example 1, except that they are spaced apart from each other by a minute optical path bundle 17 such as an optical fiber, and then developed and fixed to obtain a hologram sheet.
このようにして得られたホログラムシートを実施例１と
同様、窓ガラスに接着して再生すると、結像位置は露光
時の散乱板の共役位置、即ち屋外側のホログラムシート
からＬ （ｎ）ｆｉれた位置に結像し、空間に浮かぶ表
示像が、背後の透過光とともに、実施例１とほぼ同じ範
囲から視認することができた。When the hologram sheet thus obtained is reproduced by adhering it to a window glass as in Example 1, the image formation position is the conjugate position of the scattering plate at the time of exposure, that is, L (n)fi from the hologram sheet on the outdoor side. The displayed image, which was formed at a position where the display image was formed and floated in space, was visible from approximately the same range as in Example 1, along with the transmitted light behind it.
以上、好適な実施例により説明したが、本発明はこれら
に限定されるもではなく種々の応用が可能なものである
。Although the present invention has been described above using preferred embodiments, the present invention is not limited to these embodiments and can be applied in various ways.
ホログラムシート露光時に、散乱板と感材の間に何も介
在させない場合には、離隔距離は、５鶴以内以下の範囲
で出来るだけ近接させた方がよく、微小な光路束を介在
させる場合には、離隔距離は特に制限されない。この場
合の微小光路束は光路径が小さいと表示像の分解能が高
くなり、好ましいがＩｎ程度迄であれば充分実用に供し
うるので光ファイバーに限らず、格子状断面を全長にわ
たり有するもので、通過する光が漏れないようにすれば
各種のものが使用可能である。また、散乱板の形状は平
面形状だけでなく曲面形状でもよく、その場合には形状
に応じて結像される。When exposing the hologram sheet, if nothing is interposed between the scattering plate and the photosensitive material, it is better to keep the separation distance as close as possible within the range of 5 cranes or less. The separation distance is not particularly limited. In this case, if the diameter of the minute optical path is small, the resolution of the displayed image will be high, and it is preferable that the optical path diameter is about In, but it can be sufficiently put to practical use. Various types can be used as long as they do not allow the light to leak out. Further, the shape of the scattering plate may be not only a planar shape but also a curved shape, and in that case, an image is formed according to the shape.
露光時の光源は実施例のように３原色のレーザーを用い
るとカラー表示されるので好ましいが、表示したい色に
よって１〜２種のレーザーによって露光してもよい。As the light source for exposure, it is preferable to use three primary color lasers as in the embodiments because color display is possible, but one or two types of lasers may be used for exposure depending on the color desired to be displayed.
プロジェクタ−はオーバーヘッドプロジェクタ−１映写
機のように輝度の大きいものが好ましいが、その他ＣＲ
Ｔ、蛍光表示管などでもよい。The projector is preferably one with high brightness such as an overhead projector, but other CR
T, a fluorescent display tube, etc. may also be used.
用途については、建築用窓、ガラス戸以外にも、透明間
仕切板、ショーケース、乗物用の窓等にホログラムシー
トを設けて伝達したい情報等の表示用として用いうるば
かりか、ヘッドアップデイスプレィ用コンバイナーとし
ても使用可能である。In addition to architectural windows and glass doors, hologram sheets can be installed on transparent partition boards, showcases, vehicle windows, etc. to display information that you want to convey, and can also be used for head-up displays. It can also be used as a combiner.
本発明の表示装置はプロジェクタ−から投射される種々
の情報を静的には勿論、動的にも表示させることができ
るとともに、表示像を非常に広い範囲から視認できると
いう著効を奏するものである。The display device of the present invention is capable of displaying various information projected from a projector not only statically but also dynamically, and has the remarkable effect that the displayed image can be viewed from a very wide range. be.
さらに、露光時に、散乱板と感材の離隔距離を変えるこ
とによって結像位置、すなわち２次光源位置を自在に変
えることができ、再生時にプロジェクタ−の輝度と表示
像の背後の明るさを変えることにより、表示像と背後の
コントラスト比を任意に調整しうるので、表示像のみを
視認することも、表示像と背後の透過光を同時に視認す
るようにすることも自在に出来るものである。Furthermore, by changing the separation distance between the scattering plate and the photosensitive material during exposure, the imaging position, that is, the position of the secondary light source, can be freely changed, and during playback, the brightness of the projector and the brightness behind the displayed image can be changed. As a result, the contrast ratio between the displayed image and the background can be arbitrarily adjusted, so that only the displayed image can be viewed, or the displayed image and the transmitted light behind can be viewed at the same time.
第１図、第２図は、それぞれ本発明のホログラフィック
表示装置に好適なホログラムシートを作製するための露
光光学系を示す平面図、第３図は再生時の実施例を示す
要部概略図である。
２−ｍ−感材1 and 2 are plan views showing an exposure optical system for producing a hologram sheet suitable for the holographic display device of the present invention, respectively, and FIG. 3 is a schematic diagram of main parts showing an embodiment during reproduction. It is. 2-m-sensitive material
Claims (1)
近接して配置するか、感材との間を微小光路束で接続し
た散乱板を介して物体光として照射し、干渉縞を記録し
たホログラムシートに、プロジェクターから表示情報を
投射するようにしたことを特徴とするホログラフィック
表示装置。From both sides of the photosensitive material, one is irradiated as a reference light and the other is irradiated as an object light through a scattering plate placed close to the photosensitive material or connected to the photosensitive material by a minute optical path flux, and interference fringes are generated. 1. A holographic display device characterized in that display information is projected from a projector onto a hologram sheet having recorded thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33011288A JPH02173782A (en) | 1988-12-27 | 1988-12-27 | Holographic display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33011288A JPH02173782A (en) | 1988-12-27 | 1988-12-27 | Holographic display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02173782A true JPH02173782A (en) | 1990-07-05 |
| JPH0585910B2 JPH0585910B2 (en) | 1993-12-09 |
Family
ID=18228931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33011288A Granted JPH02173782A (en) | 1988-12-27 | 1988-12-27 | Holographic display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02173782A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0619382A (en) * | 1992-06-30 | 1994-01-28 | Central Glass Co Ltd | Exposing device for lippmann hologram |
| CN111399358A (en) * | 2020-04-30 | 2020-07-10 | 南京理工大学 | Holographic display screen shooting method with overlapped reflected and diffracted lights |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320738A (en) * | 2019-04-18 | 2019-10-11 | 周扬斌 | The production method of transparent projection film, projection screen, optical projection system and transparent projection film |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS582750A (en) * | 1981-06-16 | 1983-01-08 | エフ・ホフマン−ラ・ロシユ・ウント・コンパニ−・アクチエンゲゼルシヤフト | Blood coagulation time measurement method and device |
-
1988
- 1988-12-27 JP JP33011288A patent/JPH02173782A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS582750A (en) * | 1981-06-16 | 1983-01-08 | エフ・ホフマン−ラ・ロシユ・ウント・コンパニ−・アクチエンゲゼルシヤフト | Blood coagulation time measurement method and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0619382A (en) * | 1992-06-30 | 1994-01-28 | Central Glass Co Ltd | Exposing device for lippmann hologram |
| CN111399358A (en) * | 2020-04-30 | 2020-07-10 | 南京理工大学 | Holographic display screen shooting method with overlapped reflected and diffracted lights |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0585910B2 (en) | 1993-12-09 |
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