JPS61107282A - Hologram reproducing device - Google Patents
Hologram reproducing deviceInfo
- Publication number
- JPS61107282A JPS61107282A JP22780384A JP22780384A JPS61107282A JP S61107282 A JPS61107282 A JP S61107282A JP 22780384 A JP22780384 A JP 22780384A JP 22780384 A JP22780384 A JP 22780384A JP S61107282 A JPS61107282 A JP S61107282A
- Authority
- JP
- Japan
- Prior art keywords
- light beams
- parallel light
- hologram
- diffraction grating
- light
- 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
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 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
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Holo Graphy (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はホログラム装置に係シ、特に再生する装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a hologram device, and particularly to a reproduction device.
゛ 〔発明の技術的背景とその問題点〕反射部のホセグ
ラム、たとえば、いわゆるリップマンタイプと呼ばれる
ホログラムを再生する場合、従来は第２図に示すように
観察方向（１）に対して被観察面（２）が直交する向き
にして設けられたホログラム（３）を有し、上記被観察
面（２）に向けて、光源（４）とコリメータレンズ（５
）とで作られた平行光（６）が被観察面（２）の全面を
照射する入射角度（θ）で照射する構成になっている。゛ [Technical background of the invention and its problems] When reproducing a Josegram of a reflecting part, for example, a so-called Lippmann type hologram, conventionally, as shown in Fig. 2, the observed surface is (2) has a hologram (3) provided in an orthogonal direction, and a light source (4) and a collimator lens (5) facing the observed surface (2).
) is configured to irradiate the entire surface of the observed surface (2) with the parallel light (6) at an incident angle (θ).
上記の構成ではホログラムを再生するのに必要な平行光
（６）のビーム径（ｄ）は、ホログラムの一方の寸法μ
）と、入射角ψ）とからｄ ＝ Ｊ、 Ｘ ｓｉｎθの
式で表わされる。したがりて、コリメータレンズ（５）
はビーム径（ｄ）よυ大きなものが必要となることは明
白である。このため、平行光（６）を作る部分は比較的
大きくなシ、小屋化にする上で障害になっていた。In the above configuration, the beam diameter (d) of the parallel light (6) necessary to reproduce the hologram is the dimension μ of one side of the hologram.
) and the incident angle ψ), it is expressed by the equation d = J, X sin θ. Therefore, the collimator lens (5)
It is obvious that the beam diameter (d) must be larger than the beam diameter (d). For this reason, the part that produces the parallel light (6) is relatively large, which is an obstacle to converting it into a shed.
本発明はホログラムの再生用の平行光を小型な構成で作
ることによシ、全体としてコンパクトなホログラム再生
装置を提供することを目的にしたものである。An object of the present invention is to provide a hologram reproducing device that is compact as a whole by creating parallel light for reproducing holograms with a compact configuration.
上記の目的を達成するために、たとえばコリメータレン
ズによシ平行光にした光をこの光の幅より広い幅で反射
し、その反射光をホログラムに照射するように構成した
ものである。In order to achieve the above object, the hologram is configured to reflect, for example, light that has been made into parallel light by a collimator lens with a width wider than the width of this light, and to irradiate the hologram with the reflected light.
第１図は本発明の一実施例で、（１１は光源、ａｌ）は
この光源顛かもの光を平行光＆３１１Ｃするコリメータ
レンズ、（Ｉ３は平行光（ｌりをこの平行光αりの光路
外に反射する反射光学系としての回折格子、α４は回折
格子（１３での反射光（１！９で照射されるホログラム
、（Ｉｅは観察方向αηからホログラムＩをみる部分を
除いて上記各要素を覆う外圧器である。ここで回折格子
ａ３は平行光（Ｉりのビーム径（Ｄｌ）を反射光（ｔ！
９のビーム径（Ｄ、）とがＤｓ ＜ Ｄｔになるように
平行光（Ｉ′ＩＪの光路に傾けて設けられている。また
１回折格子ａ３は。Fig. 1 shows an embodiment of the present invention, (11 is a light source, al) is a collimator lens that converts the light from this light source into parallel light &311C, (I3 is a parallel light (l is the optical path of this parallel light α) A diffraction grating as a reflective optical system that reflects outward, α4 is a diffraction grating (reflected light from 13 (1!) Hologram irradiated at 9, (Ie is each of the above elements except for the part where the hologram I is viewed from the observation direction αη) Here, the diffraction grating a3 converts parallel light (I beam diameter (Dl)) into reflected light (t!
The beam diameter (D,) of 9 is tilted to the optical path of parallel light (I'IJ) so that Ds < Dt. 1 diffraction grating a3 is provided.
たとえば輝面をもつ反射減の回折格子で、−１次方向に
はぼ１００％光を回折するようなものが好ましい。For example, it is preferable to use a reflection-reducing diffraction grating with a bright surface that diffracts almost 100% of the light in the -1st order direction.
なお、上記実施例では一つの回折格子で一方向のみのビ
ーム拡大を示したが、第１図を示し九紙面に直交する方
向にもう一つの回折格子を用いることで二軸方向にわた
る拡がったビームをホログラムの近傍につくることがで
きる。In the above embodiment, one diffraction grating was used to expand the beam in only one direction, but as shown in FIG. can be created near the hologram.
平行光を拡大した反射平行光にする反射光学系を設けた
構成によシ、平行光を作る光学系は直径の小さなもので
充分となシ、装置の小型化が達成された。By using a configuration that includes a reflective optical system that converts parallel light into expanded reflected parallel light, an optical system that creates parallel light with a small diameter is sufficient, and the device can be miniaturized.
第ｉｒＩ！Ｊは本発明の一実施例を示す断面図、第２図
は従来例の概要を示す構成図である。
ａｌ・・・光 源 ａｌ）・・・コリメータレ
ンズ住ト・・回折格子 （１４・・・ホログラム代
理人 弁理士 則 近 憲 佑
（ほか１名）No. irI! J is a sectional view showing one embodiment of the present invention, and FIG. 2 is a configuration diagram showing an outline of a conventional example. al...Light source al)...Collimator lens...Diffraction grating (14...Hologram agent Patent attorney Kensuke Chika (and 1 other person)
Claims (1)
行光をこの平行光の幅より大の反射平行光にして上記平
行光の光路外へ直進させる傾きにして設けられた反射光
学系と、観察方向に向く面が上記反射平行光で照射され
る位置に設けられた反射量ホログラムとを備えたことを
特徴とするホログラム再生装置。a light source, an optical system that converts the light from the light source into parallel light, and a reflective optical system installed at an angle that converts the parallel light into reflected parallel light with a width greater than the width of the parallel light and travels straight out of the optical path of the parallel light. What is claimed is: 1. A hologram reproducing device comprising: a hologram reproducing system; and a reflection amount hologram provided at a position where a surface facing the observation direction is irradiated with the reflected parallel light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22780384A JPS61107282A (en) | 1984-10-31 | 1984-10-31 | Hologram reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22780384A JPS61107282A (en) | 1984-10-31 | 1984-10-31 | Hologram reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61107282A true JPS61107282A (en) | 1986-05-26 |
Family
ID=16866625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22780384A Pending JPS61107282A (en) | 1984-10-31 | 1984-10-31 | Hologram reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61107282A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990015367A2 (en) * | 1989-06-01 | 1990-12-13 | First Holographics Limited | Improvements in or relating to holographic displays |
| WO1992018913A1 (en) * | 1991-04-10 | 1992-10-29 | Derk Scott Peterson | Hologram lighting system |
-
1984
- 1984-10-31 JP JP22780384A patent/JPS61107282A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990015367A2 (en) * | 1989-06-01 | 1990-12-13 | First Holographics Limited | Improvements in or relating to holographic displays |
| WO1990015367A3 (en) * | 1989-06-01 | 1991-01-24 | First Holographics Limited | Improvements in or relating to holographic displays |
| WO1992018913A1 (en) * | 1991-04-10 | 1992-10-29 | Derk Scott Peterson | Hologram lighting system |
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