JPH03194585A - Holographic display device - Google Patents

Holographic display device

Info

Publication number
JPH03194585A
JPH03194585A JP33548889A JP33548889A JPH03194585A JP H03194585 A JPH03194585 A JP H03194585A JP 33548889 A JP33548889 A JP 33548889A JP 33548889 A JP33548889 A JP 33548889A JP H03194585 A JPH03194585 A JP H03194585A
Authority
JP
Japan
Prior art keywords
light
light source
mask plate
pattern
transmission
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
Application number
JP33548889A
Other languages
Japanese (ja)
Other versions
JP2872310B2 (en
Inventor
Tomohisa Ishikawa
石川 友久
Yoshinori Akamatsu
佳則 赤松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Central Glass Co Ltd
Original Assignee
Central Glass Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Central Glass Co Ltd filed Critical Central Glass Co Ltd
Priority to JP1335488A priority Critical patent/JP2872310B2/en
Publication of JPH03194585A publication Critical patent/JPH03194585A/en
Application granted granted Critical
Publication of JP2872310B2 publication Critical patent/JP2872310B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • G02B27/0101Head-up displays characterised by optical features
    • G02B27/0103Head-up displays characterised by optical features comprising holographic elements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • G02B27/0101Head-up displays characterised by optical features
    • G02B2027/0112Head-up displays characterised by optical features comprising device for genereting colour display
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/20Filters
    • G02B5/22Absorbing filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Holo Graphy (AREA)

Abstract

PURPOSE:To arbitrarily select the position of a light source and to completely display a pattern by interposing a mask plate formed with the patterns of a part to allow the transmission of the light from the light source as diffused light and a part to prohibit the transmission thereof between a transmission type hologram sheet and the light source. CONSTITUTION:The mask plate 3 which is formed with the pattern of, for example, 'STOP' or the like and is formed of the pattern part as a light transmission part 3a and the other part as a light opaque part 3b is formed. The transmission type hologram sheet 2 is provided as a high mount stop lamp on the sandwich surface side of sandwich glass 12 and this glass is mounted as a rear windshield for automobiles. The mask plate 3 is integrated with the light source 1 and a red filter 13 and is provided atop a rear parcel 14. The light from the light source 1 is projected as spherical waves of a red color to the mask plate 3. The part formed with the STOP of this mask plate 3 allows the light as the diffused light and the diffused light is diffracted to the human eyes 4 so that the red word STOP is visually recognized by the eyes 4 of the man on the side opposite from the light source 1, for example, the driver of a succeeding vehicle.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は自動車用のハイマウントストップランプ、ショ
ーウイントウのデイスプレィ等、各種の表示体として応
用可能なホログラフィック表示装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a holographic display device that can be used as various displays such as high-mounted stop lamps for automobiles and shop window displays.

[従来の技術] 従来、ハイマウントストップランプとして光源とハウジ
ングが一体化されたものを、車両の後部窓ガラスに直接
設けるか接するように設けるので自由空間を狭くするば
かりか、運転者等の視界の支障になることは避けられな
かった。
[Prior Art] Conventionally, high-mounted stop lamps with an integrated light source and housing have been installed directly on or in contact with the rear window glass of a vehicle, which not only narrows the free space but also reduces the visibility of the driver, etc. It was inevitable that this would become a hindrance.

このような問題点を解決するためには、露光時に表示し
よとする模様を記録したホログラムシートを所定の光源
で再生すればよいが、これ以外の模様を表示することは
できないという欠点がある。
In order to solve these problems, it is possible to reproduce the hologram sheet that records the pattern to be displayed during exposure using a predetermined light source, but it has the disadvantage that it is not possible to display other patterns. .

また、無地の透過型ホログラムシートと光源の間に、透
明ガラスなどに不透明部分を形成して得られる模様付き
マスク板を介在させるようにしてこの模様とは異なる模
様を有するマスク板をに取り替えるようにすると各種の
異なる模様を表示させることができるが、光源の虚像の
みが再生され、模様を完全に再生することができないと
いう欠点がある。
In addition, a patterned mask plate obtained by forming an opaque part on transparent glass or the like is interposed between the plain transparent hologram sheet and the light source, and a mask plate with a pattern different from the pattern can be replaced. This allows various different patterns to be displayed, but it has the disadvantage that only the virtual image of the light source is reproduced and the pattern cannot be completely reproduced.

[発明の目的] 本発明はこのような欠点を解消するものであり光源の位
置を任意に選択できるとともに、ホログラムシートより
光源側からの視界を妨げることなく、所望の模様が完全
に表示可能な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。
[Objective of the Invention] The present invention solves these drawbacks, and allows the position of the light source to be arbitrarily selected, and allows a desired pattern to be completely displayed without obstructing the view from the light source side of the hologram sheet. The present invention aims to provide a holographic display device.

[問題点を解決するための手段] 本発明の表示装置は、無地の透過型ホログラムシートと
光源の間に、光源からの光を拡散光として透過させる部
分と実質的に透過させない部分により文字、図形などの
模様を形成したマスク板を介在させるようにしたことを
特徴とする。
[Means for Solving the Problems] The display device of the present invention has a part that transmits light from the light source as diffused light and a part that does not substantially transmit the light from the light source between the plain transmission type hologram sheet and the light source. It is characterized by interposing a mask plate on which a pattern such as a figure is formed.

[作用] 本発明は、第1図の再生時の要部概略図に示すように、
光源1と透過型ホログラムシート2の間に、光源1の光
を透過する部分3aと透過しない部分3bにより模様が
形成されたマスク板3を介在させることにより、透過型
ホログラムシートにマスク板に形成された模様を表示す
るものである。
[Function] As shown in the schematic diagram of main parts during reproduction in FIG.
By interposing a mask plate 3 between the light source 1 and the transmission hologram sheet 2, which has a pattern formed by a portion 3a that transmits the light of the light source 1 and a portion 3b that does not transmit the light, a mask plate can be formed on the transmission hologram sheet. It displays the pattern that was created.

ただ、この場合、単にマスク板の光透過部分を穿孔する
か、ガラスなどの透明板で形成したものでは、光源の光
がマスク板の光透過部分をほぼ直進するので光源と反対
側の人の目にはマスク板のg4様の一部と光源そのもの
虚像のみが再生され、模様全体を視認することができな
い。
However, in this case, if the light-transmitting part of the mask plate is simply perforated or made of a transparent plate such as glass, the light from the light source will travel almost straight through the light-transmitting part of the mask plate, so the person on the opposite side of the light source will Only part of the g4 pattern on the mask board and a virtual image of the light source itself are reproduced to the eye, and the entire pattern cannot be seen.

表面凹凸を有する光透過性の板、例えばすりガラスなど
に不透過部分3bが形成された模様付きマスク板3を用
いることにより1、マスク板3に光源1から投射された
光は不透過部分以外の透過部分3aにおいて、光が散乱
されあたかも多数の点光源があり、それらの点光源から
球面波が発生するようにふるまう、すなわち、点光源P
1からの光は発散し、ホログラムシート2に達した後、
そのうち点P1′に入射された光のみが目4の方向に回
折し、同時にP1′の延長線上に虚像P1”が形成され
る。
By using a patterned mask plate 3 in which an opaque part 3b is formed on a light-transmissive plate having an uneven surface, such as frosted glass, 1, the light projected from the light source 1 onto the mask plate 3 is transmitted to areas other than the opaque part. In the transparent part 3a, the light is scattered and behaves as if there were many point light sources and spherical waves were generated from these point light sources, that is, the point light source P
The light from 1 diverges and after reaching hologram sheet 2,
Among them, only the light incident on point P1' is diffracted in the direction of the eye 4, and at the same time, a virtual image P1'' is formed on the extension line of P1'.

一方、点光源P2からの光も発散し、ホログラムシート
2に達した後、そのうち点P2′に入射された光のみが
目4方向に回折し、同時にP2の延長線上に虚像P2”
が形成される。
On the other hand, the light from the point light source P2 also diverges, and after reaching the hologram sheet 2, only the light incident on the point P2' is diffracted in the eye 4 direction, and at the same time, a virtual image P2'' appears on the extension line of P2.
is formed.

点P1と点P2の間の総ての点についても、目4の方向
に回折するとともに、虚像P□”−P2”の間に各点に
対応して虚像が形成される。
All points between the point P1 and the point P2 are also diffracted in the direction of the eye 4, and a virtual image is formed corresponding to each point between the virtual image P□''-P2''.

その結果、マスク板に形成された模様全体が光源と反対
側の人の目4に透過型ホログラムシート2を通して虚像
Pi”−P2”として視認される。
As a result, the entire pattern formed on the mask plate is visually recognized as a virtual image Pi"-P2" through the transmission hologram sheet 2 by the eye 4 of the person on the opposite side of the light source.

なお、第1図には白色光源を使用した例として赤色など
のフィルター13を示している。
Note that FIG. 1 shows a red filter 13 as an example using a white light source.

[実施例] 以下、図面を参照しながら本発明の詳細な説明する。[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

第1図は本発明のホログラフィック表示装置再生時の光
学系を示す要部概略図、第2図は透過型ホログラムシー
トの作製時の光学系を示す図、第3図は自動車の後部窓
ガラスにハイマウントストップランプとして応用した例
を示す要部概略図である。
Fig. 1 is a schematic diagram of the main parts showing the optical system during reproduction of the holographic display device of the present invention, Fig. 2 is a diagram showing the optical system during production of a transmission type hologram sheet, and Fig. 3 is a rear window glass of an automobile. FIG. 2 is a schematic diagram of main parts showing an example in which the present invention is applied as a high-mounted stop lamp.

(透過型ホログラムシートの作製) ポリエステルフィルム上に、例えば重クロム酸ゼラチン
を感材として塗布、乾燥させたホログラム原板5を第2
図に示すよな光学系により露光させる。アルゴンレーザ
ー発振器6から発振されるレーザー光をビームスプリッ
タ−7で2分割し、一方は反射鏡8、凸レンズ9を介し
て球面波として、他方は反射鏡10、凸レンズ11を介
して球面波として、ホログラム原板5に照射、その後通
常の方法により現像して透過型ホログラムシート2を作
製する。
(Production of Transmission Hologram Sheet) A hologram original plate 5, which is made by coating a polyester film with, for example, dichromate gelatin as a sensitive material and drying it, is
Exposure is performed using an optical system as shown in the figure. A laser beam emitted from an argon laser oscillator 6 is split into two by a beam splitter 7, one of which is converted into a spherical wave via a reflecting mirror 8 and a convex lens 9, and the other is converted into a spherical wave via a reflecting mirror 10 and a convex lens 11. The hologram original plate 5 is irradiated and then developed by a conventional method to produce a transmission hologram sheet 2.

なお、レーザー光の波長、ホログラム原板5に対する2
方向からのレーザー光の入射角は、再生時の条件(光源
と人の目の配置、光源の種類)および感光材の厚み変化
等を考慮して、Braggの式により設定すればよい。
Note that the wavelength of the laser beam is 2 with respect to the hologram original plate 5.
The incident angle of the laser beam from the direction may be set according to Bragg's formula, taking into account conditions during reproduction (positioning of the light source and human eyes, type of light source), changes in the thickness of the photosensitive material, and the like.

(マスク板の作製) すりガラス等の光透過性の散乱板にセラミックペースト
等をスクリーン印刷するなどの方法により、例えば5T
OPなどの模様を形成し、模様部分を光透過部分3a、
スクリーン印刷したそれ以外の部分を光不透過部分を3
bとするマスク板3を作成する。
(Preparation of mask plate) For example, 5T
A pattern such as OP is formed, and the pattern part is a light transmitting part 3a,
The other parts that are screen printed are opaque to light.
A mask plate 3 designated as b is created.

(ホログラフィック表示装置の再生) このようにして得られた透過型ホログラムシート2を、
第3図に示すように2枚の板ガラスをポリビニールブチ
ラールなどの中間膜により接着した合わせガラス12の
合わせ面倒にハイマウントストップランプとして設け、
自動車用の後部窓ガラスとして装着する。
(Reproduction of holographic display device) The transmission hologram sheet 2 obtained in this way is
As shown in FIG. 3, a high-mounted stop lamp is installed on the laminated glass 12 made by bonding two sheets of glass with an interlayer film such as polyvinyl butyral.
Installed as rear window glass for automobiles.

また、前述の方法で得られたマスク板3は白熱電球など
の光a1、赤色フィルター13と一体化してリアパーセ
ル14の上面に設ける。
Further, the mask plate 3 obtained by the above method is integrated with light a1 such as an incandescent light bulb and a red filter 13, and is provided on the upper surface of the rear parcel 14.

このような光学系により、電源を投入すると、光+19
1からの光は赤色の球面波としてマスク板3に照射され
る。
With such an optical system, when the power is turned on, the light +19
The light from 1 is irradiated onto the mask plate 3 as a red spherical wave.

マスク板3では5TOPと形成された部分が拡散光とし
て光を透過させ、多数の点光源があり、それらの点光源
から球面波が発生するようにふるまうので、これらの拡
散光が人の目4に回折され、光源と反対側の人の目、例
えば後続車の運転者などの目4に赤色の5TOPという
文字が明確に視認される。
In the mask plate 3, the portion formed as 5TOP transmits light as diffused light, and there are many point light sources, and these point light sources behave as if they generate spherical waves, so these diffused lights are visible to the human eye 4. The red letters 5TOP are clearly visible to the eyes of a person on the opposite side of the light source, such as the eyes of a driver of a following vehicle.

この場合、該表示体を実装した自動車の運転者、同乗者
には5TOPという文字は!!識されず、外部視界の支
障にならない。
In this case, the driver and passenger of a car equipped with the display will not see the words 5TOP! ! It is invisible and does not interfere with external visibility.

以上、好適な実施例により説明したが、本発明はこれら
限定されるものではなく、種々の応用が可能である。
Although the present invention has been described above using preferred embodiments, the present invention is not limited to these embodiments, and various applications are possible.

マスク板について、すりガラスなどの表面に微小な凹凸
が形成された光透過性の拡散板に、不透明なセラミック
ペースト、塗料などを、印刷、塗布などの方法により各
種の模様を形成すればよく、これらのマスク板を機械的
に切替え可能にしておけば、各種の模様を表示すること
ができる。
For mask plates, various patterns can be formed on a light-transmitting diffuser plate made of frosted glass or other material with minute irregularities formed on its surface by printing, coating, or other methods with opaque ceramic paste, paint, etc. By making the mask plate mechanically switchable, various patterns can be displayed.

また、液晶などの光散乱型表示素子により光透過部分と
不透過部分を形成してマスク板としてもよい、この場合
には模様を任意に変えることができ、動く画像も表示す
ることができる。
Alternatively, a light-transmitting portion and a non-transmitting portion may be formed using a light-scattering display element such as a liquid crystal to form a mask plate. In this case, the pattern can be changed arbitrarily, and moving images can also be displayed.

感光材について、重クロム酸ゼラチン以外にもハロゲン
化銀感光材、各種のフォトポリマー、フォトレジストな
ど適宜選択して用いればよい。
In addition to dichromate gelatin, the photosensitive material may be appropriately selected and used, such as silver halide photosensitive materials, various photopolymers, and photoresists.

また、ホログラムシートは一般的に湿気を吸うと劣化す
るので、合わせガラスにおいて、2枚の中間膜の間に挟
持した方が好ましいが、中間膜と板ガラスの間に挟持し
てもよく、さらに表面に保護膜を被覆すれば単板ガラス
に設けることもできる。
In addition, since hologram sheets generally deteriorate when they absorb moisture, it is preferable to sandwich them between two interlayer films in laminated glass, but they may also be sandwiched between an interlayer film and a plate glass, and the surface It can also be provided on a single glass plate if it is coated with a protective film.

再生時の光源について、白色光源以外にも、レーザー光
源などを使用することができる。この場合に、光を発散
させるための凸レンズを光源とマスク板の間に設ける必
要があるが、フィルターは必ずしも必要ではない。
As for the light source during reproduction, in addition to a white light source, a laser light source or the like can be used. In this case, a convex lens for diffusing light must be provided between the light source and the mask plate, but a filter is not necessarily required.

また、本発明の表示装置はハイマウントストップランプ
以外にも、各種の運転情報、広告情報等を表示させても
よく、従って乗り物の窓は勿論、建築物の窓、間仕切り
等を利用することもできる。
Furthermore, the display device of the present invention may display various types of driving information, advertising information, etc. in addition to the high-mounted stop lamp, and therefore can be used not only in the windows of vehicles but also in the windows of buildings, partitions, etc. can.

[発明の効果] 本発明のホログラフィック表示装置は、光源側からの視
界を妨げることなく、光源の反対側から各種の表示情報
全体を完全に視認することができるもので、光源の位置
も露光時の条件により自在に選択できるので、室内空間
の狭い建物、乗り物などの窓を通して表示するのに特に
好適である。
[Effects of the Invention] The holographic display device of the present invention allows all types of displayed information to be completely viewed from the opposite side of the light source without obstructing the field of view from the light source side, and the position of the light source is also controlled by the exposure. Since it can be selected freely depending on the conditions at the time, it is particularly suitable for displaying through windows of buildings, vehicles, etc. with narrow indoor spaces.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明のホログラフィック表示装置再生時の光
学系を示す要部概略図、第2図は透過型ホログラムシー
トの作製時の光学系を示す図、第3図は自動車の後部窓
ガラスにハイマウントストンプランプとして応用した例
を示す要部概略図である。 1・・・光源 2・・・透過型ホログラムシート 3・・・マスク板 4・・・目
Fig. 1 is a schematic diagram of the main parts showing the optical system during reproduction of the holographic display device of the present invention, Fig. 2 is a diagram showing the optical system during production of a transmission type hologram sheet, and Fig. 3 is a rear window glass of an automobile. FIG. 2 is a schematic diagram of main parts showing an example of application as a high-mounted stone lamp. 1... Light source 2... Transmissive hologram sheet 3... Mask plate 4... Eyes

Claims (1)

【特許請求の範囲】[Claims] 透過型ホログラムシートと光源の間に、光源からの光を
拡散光として透過させる部分と実質的に透過させない部
分により模様を形成したマスク板を介在させるようにし
たことを特徴とするホログラフィック表示装置。
A holographic display device characterized in that a mask plate having a pattern formed by a part that transmits light from the light source as diffused light and a part that does not substantially transmit the light is interposed between a transmission type hologram sheet and a light source. .
JP1335488A 1989-12-25 1989-12-25 Holographic display device Expired - Lifetime JP2872310B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1335488A JP2872310B2 (en) 1989-12-25 1989-12-25 Holographic display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1335488A JP2872310B2 (en) 1989-12-25 1989-12-25 Holographic display device

Publications (2)

Publication Number Publication Date
JPH03194585A true JPH03194585A (en) 1991-08-26
JP2872310B2 JP2872310B2 (en) 1999-03-17

Family

ID=18289136

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1335488A Expired - Lifetime JP2872310B2 (en) 1989-12-25 1989-12-25 Holographic display device

Country Status (1)

Country Link
JP (1) JP2872310B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6288803B1 (en) * 1997-10-27 2001-09-11 Denso Corporation Hologram display

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60191067U (en) * 1984-05-29 1985-12-18 日本写真印刷株式会社 Display using hologram

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60191067U (en) * 1984-05-29 1985-12-18 日本写真印刷株式会社 Display using hologram

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6288803B1 (en) * 1997-10-27 2001-09-11 Denso Corporation Hologram display

Also Published As

Publication number Publication date
JP2872310B2 (en) 1999-03-17

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