JPH06202575A - Holographic display - Google Patents

Holographic display

Info

Publication number
JPH06202575A
JPH06202575A JP94893A JP94893A JPH06202575A JP H06202575 A JPH06202575 A JP H06202575A JP 94893 A JP94893 A JP 94893A JP 94893 A JP94893 A JP 94893A JP H06202575 A JPH06202575 A JP H06202575A
Authority
JP
Japan
Prior art keywords
light
light modulator
spatial light
read
modulator
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
Application number
JP94893A
Other languages
Japanese (ja)
Inventor
Shunichi Sato
俊一 佐藤
Terutaka Tokumaru
照高 徳丸
Hiroko Morita
裕子 森田
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP94893A priority Critical patent/JPH06202575A/en
Publication of JPH06202575A publication Critical patent/JPH06202575A/en
Pending legal-status Critical Current

Links

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
    • G03H1/2294—Addressing the hologram to an active spatial light modulator
    • 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
    • G03H2001/2236—Details of the viewing window
    • G03H2001/2239—Enlarging the viewing window
    • 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
    • G03H2001/2292—Using scanning means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2225/00—Active addressable light modulator
    • G03H2225/20—Nature, e.g. e-beam addressed
    • G03H2225/25—Optically addressed SLM [OA-SLM]

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Holo Graphy (AREA)

Abstract

PURPOSE:To enlarge the range where a hologram image is observed, that is, the visual area by scanning a read light or a write light for a space light modulator by using a galvanomirror. CONSTITUTION:The incident system of the read light 33 is constituted of a He-Ne laser 7 for read, a beam expander 8 arranged on the optical path of the beam and making the beam a parallel luminous flux, a polarizing plate 9 arranged on the parallel luminous flux, the rocking galvanomirror 10 facing the luminous flux (read beam 33) passing through the polarizing plate 9 in the direction of the space light modulator 6 and a lens 11. Then, the reference beam 31 divided from the He-Ne laser 1 for write and an object beam 32 passing through an original image 5 are made incident on the same position on the write surface of the space light modulator 6 to be written as interference fringes. Simultaneously, the read light 33 is made incident on the read surface of the space light modulator 6 from the multiple directions through the galvanomirror 10. Thus, a two-dimensional hologram image is observed from wider range.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、空間光変調器を用いた
ホログラフィックディスプレイに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holographic display using a spatial light modulator.

【０００２】[0002]

【従来の技術】従来、空間光変調器を実時間ホログラム
として用いたホログラフィックディスプレイは、図４に
示すように、空間光変調器６の書き込み面に対する参照
光３１及び物体光３２の入射系と、同じく空間光変調器
６の読み込み面に対する読み出し光３３の入射系とから
なる。2. Description of the Related Art Conventionally, as shown in FIG. 4, a holographic display using a spatial light modulator as a real-time hologram has a system in which a reference light 31 and an object light 32 are incident on a writing surface of the spatial light modulator 6. Similarly, an incident system of the reading light 33 to the reading surface of the spatial light modulator 6 is included.

【０００３】参照光３１及び物体光３２の入射系は、書
き込み用Ｈｅ−Ｎｅレーザ１と、該レーザ１からのビー
ムの光路上に配置され、該ビームを所定の幅を有する平
行光束とするビームエキスパンダー２と、該平行光束に
対して概ね４５°の角度にて配置され、これをそのまま
直進する第１の光束（参照光３１）とそれに対して概ね
直交する第２の光束とに分割するハーフミラー３と、参
照光３１の光路上に配置された空間光変調器６と、第２
の光束を空間光変調器６の方に向けるミラー４と、ミラ
ー４によって反射された後の第２の光束の光路上に配置
された原画像５とから成る。An incident system of the reference light 31 and the object light 32 is arranged on the writing He-Ne laser 1 and an optical path of a beam from the laser 1 and is a beam for converting the beam into a parallel light flux having a predetermined width. An expander 2 and a half that is arranged at an angle of approximately 45 ° with respect to the parallel light flux and divides this into a first light flux (reference light 31) that travels straight as it is and a second light flux that is substantially orthogonal to it. The mirror 3, the spatial light modulator 6 arranged on the optical path of the reference light 31, and the second
Of the light flux of the first light flux toward the spatial light modulator 6 and the original image 5 arranged on the optical path of the second light flux after being reflected by the mirror 4.

【０００４】また、読み出し光３３の入射系は、読み出
し用Ｈｅ−Ｎｅレーザ７と、該レーザ７からのビームの
光路上に配置され、該ビームを所定の幅を有する平行光
束とするビームエキスパンダー８と、該平行光束上に配
置された偏光板９と、偏光板９を通過してきた光束（読
み出し光３３）を空間光変調器６の方に向けるミラー２
０とから成る。Further, the incident system of the reading light 33 is arranged on the He-Ne laser 7 for reading and the beam expander 8 which is arranged on the optical path of the beam from the laser 7 and makes the beam a parallel light beam having a predetermined width. And a polarizing plate 9 arranged on the parallel luminous flux, and a mirror 2 for directing the luminous flux (reading light 33) passing through the polarizing plate 9 toward the spatial light modulator 6.
It consists of 0 and.

【０００５】空間光変調器６からの１次回折光３４の進
路上にはフィールドレンズ１２が配置されており、観測
者の目１３には空間光変調器６からの光がフィールドレ
ンズ１２を介して入射される。尚、３５は反射光（０次
回折光）を示す。A field lens 12 is arranged on the path of the first-order diffracted light 34 from the spatial light modulator 6, and the light from the spatial light modulator 6 passes through the field lens 12 to the eyes 13 of the observer. It is incident. In addition, 35 shows reflected light (0th order diffracted light).

【０００６】上記の構成にて、書き込み用Ｈｅ−Ｎｅレ
ーザ１から分割された参照光３１と原画像を透過した物
体光３２を空間光変調器６の書き込み面の同一場所に入
射させ、空間光変調器６に干渉縞として書き込み、同時
に読み出し光３３を空間光変調器６の読み出し面に入射
させ２次元ホログラム像を再生している。多数の物体光
を同時に書き込めば、ホログフィックステレオグラムと
して立体像の再生も可能である。With the above configuration, the reference light 31 split from the He-Ne laser 1 for writing and the object light 32 transmitted through the original image are made incident on the same location on the writing surface of the spatial light modulator 6, and the spatial light is emitted. The modulator 6 is written as interference fringes, and at the same time, the read light 33 is made incident on the read surface of the spatial light modulator 6 to reproduce a two-dimensional hologram image. By writing a large number of object lights at the same time, it is possible to reproduce a stereoscopic image as a holographic stereogram.

【０００７】ここで、ホログラフィックディスプレイに
は、視野と視域という概念があり、図５に示すように定
義されている。すなわち視野とは物体４１の空間におけ
る幅４２あるいはその見込み角４３であり、視域は視点
の動き得る範囲４４あるいは物体から見たその広がり角
４５を意味している。上記従来例のフィールドレンズ１
２は視野拡大のために用いられている。Here, the holographic display has a concept of a visual field and a visual field, which are defined as shown in FIG. That is, the field of view means the width 42 of the space of the object 41 or its prospective angle 43, and the visual field means the range 44 in which the viewpoint can move or its divergence angle 45 viewed from the object. Field lens 1 of the above conventional example
2 is used for expanding the visual field.

【０００８】また、空間光変調器６としては、フォトリ
フラクティブ結晶や液晶と光導電体を組み合わせたもの
が用いられる。図６に液晶と光導電体を組み合わせた空
間光変調器を示す。As the spatial light modulator 6, a photorefractive crystal or a combination of liquid crystal and a photoconductor is used. FIG. 6 shows a spatial light modulator in which a liquid crystal and a photoconductor are combined.

【０００９】図６において、空間光変調器６は、ガラス
基板６１、６２と、該ガラス基板６１、６２の内側面に
夫々設けられた透明電極６３、６４と、透明電極６３上
に設けられた光導電層６５と、光導電層６５上に設けら
れた誘電体ミラー６６と、誘電体ミラー６６及び透明電
極６４の間に封入された液晶層６７とにより構成されて
いる。ここで、光導電層は水素化アモルファスシリコン
など用いられ、液晶層としてはホモジニアス配向したネ
マティック液晶が用いられる。また、透明電極６３、６
４には交流電圧６８が印加される。尚、図中１４は再生
画像を示す。In FIG. 6, the spatial light modulator 6 is provided on the glass substrates 61 and 62, transparent electrodes 63 and 64 provided on the inner side surfaces of the glass substrates 61 and 62, and the transparent electrode 63, respectively. It is composed of a photoconductive layer 65, a dielectric mirror 66 provided on the photoconductive layer 65, and a liquid crystal layer 67 enclosed between the dielectric mirror 66 and the transparent electrode 64. Here, hydrogenated amorphous silicon or the like is used for the photoconductive layer, and homogeneously aligned nematic liquid crystal is used for the liquid crystal layer. In addition, the transparent electrodes 63 and 6
An AC voltage 68 is applied to 4. Incidentally, reference numeral 14 in the drawing denotes a reproduced image.

【００１０】[0010]

【発明が解決しようとする課題】上述したホログラフィ
ックディスプレイでは、視野を大きくするためにフィー
ルドレンズを用いるが、挿入されたフィールドレンズは
視域を狭くするように作用し、結局視野が大きくなった
分、視域が狭くなってしまうという問題が有った。In the above-mentioned holographic display, a field lens is used to increase the field of view, but the inserted field lens acts to narrow the visual field and eventually the field of view becomes large. There was a problem that the viewing zone became narrower.

【００１１】そこで、本発明は、この視域を拡大するこ
とを目的とする。Therefore, the object of the present invention is to expand this viewing zone.

【００１２】[0012]

【課題を解決するための手段】請求項１の発明は、空間
光変調器を実時間ホログラムとして用いたホログラフィ
ックディスプレイにおいて、読み出し光を空間光変調器
に対して走査する手段を備えることを特徴とする。According to a first aspect of the present invention, in a holographic display using a spatial light modulator as a real-time hologram, it is provided with means for scanning the read light with respect to the spatial light modulator. And

【００１３】また、請求項２の発明は、物体光を空間光
変調器に対して走査する手段を備えることを特徴とす
る。The invention of claim 2 is characterized in that it comprises means for scanning the object light with respect to the spatial light modulator.

【００１４】また、請求項３の発明は、空間光変調器を
ガルバノミラーのように振る手段を備えることを特徴と
する。Further, the invention of claim 3 is characterized by comprising means for swinging the spatial light modulator like a galvanometer mirror.

【００１５】[0015]

【作用】請求光１または２に記載の構成によれば、空間
光変調器を実時間ホログラムとして用いたホログラフィ
ックディスプレイにおいて、読み出し光または物体光は
空間光変調器に対して走査される。また、請求項３に記
載の構成によれば、空間光変調器自体がをガルバノミラ
ーのように振られる。これらによれば、読み出し光また
は物体光の少なくとも一方が光変調器に対して多方面に
入射され、その結果、視域の拡大を可能とする。According to the structure described in claim 1 or 2, in the holographic display using the spatial light modulator as a real-time hologram, the reading light or the object light is scanned with respect to the spatial light modulator. According to the third aspect of the invention, the spatial light modulator itself is swung like a galvanometer mirror. According to these, at least one of the reading light and the object light is incident on the optical modulator in various directions, and as a result, the viewing zone can be expanded.

【００１６】[0016]

【実施例】以下、図面を参照して、本発明にてなるホロ
グラフィックディスプレイの実施例を説明する。Embodiments of the holographic display according to the present invention will be described below with reference to the drawings.

【００１７】図１は、本発明のホログラフィックディス
プレイの第１の実施例の構成を示す。図１の実施例は、
空間光変調器６の書き込み面に対する参照光３１及び物
体光３２の入射系と、同じく空間光変調器６の読み込み
面に対する読み出し光３３の入射系とからなる。FIG. 1 shows the configuration of a first embodiment of the holographic display of the present invention. The embodiment of FIG.
The spatial light modulator 6 includes a reference light 31 and an object light 32 that are incident on the writing surface of the spatial light modulator 6, and a read light 33 that is incident on a reading surface of the spatial light modulator 6.

【００１８】参照光３１及び物体光３２の入射系は、書
き込み用Ｈｅ−Ｎｅレーザ１と、該レーザ１からのビー
ムの光路上に配置され、該ビームを所定の幅を有する平
行光束とするビームエキスパンダー２と、該平行光束に
対して概ね４５°の角度にて配置され、これをそのまま
直進する第１の光束（参照光３１）とそれに対して概ね
直交する第２の光束とに分割するハーフミラー３と、参
照光３１の光路上に配置された空間光変調器６と、第２
の光束を空間光変調器６の方に向けるミラー４と、ミラ
ー４によって反射された後の第２の光束の光路上に配置
された原画像５とから成る。An incident system of the reference light 31 and the object light 32 is arranged on the writing He-Ne laser 1 and an optical path of a beam from the laser 1, and is a beam for making the beam into a parallel light flux having a predetermined width. An expander 2 and a half that is arranged at an angle of approximately 45 ° with respect to the parallel light flux and divides this into a first light flux (reference light 31) that travels straight as it is and a second light flux that is substantially orthogonal to it. The mirror 3, the spatial light modulator 6 arranged on the optical path of the reference light 31, and the second
Of the light flux of the first light flux toward the spatial light modulator 6 and the original image 5 arranged on the optical path of the second light flux after being reflected by the mirror 4.

【００１９】また、読み出し光３３の入射系は、読み出
し用Ｈｅ−Ｎｅレーザ７と、該レーザ７からのビームの
光路上に配置され、該ビームを所定の幅を有する平行光
束とするビームエキスパンダー８と、該平行光束上に配
置された偏光板９と、偏光板９を通過してきた光束（読
み出し光３３）を空間光変調器６の方に向けるととも
に、揺動するガルバノミラー１０と、ガルバノミラー１
０からの光を空間光変調器６上に入射させるためのレン
ズ１１とから成る。Further, the incident system of the reading light 33 is arranged on the He-Ne laser for reading 7 and the beam expander 8 which is arranged on the optical path of the beam from the laser 7 and makes the beam a parallel light beam having a predetermined width. And a polarizing plate 9 arranged on the parallel luminous flux, and a galvano-mirror 10 and a galvano-mirror 10 which oscillate while directing the luminous flux (reading light 33) passing through the polarizing plate 9 toward the spatial light modulator 6. 1
And a lens 11 for making light from 0 incident on the spatial light modulator 6.

【００２０】空間光変調器６からの光の進路上にはフィ
ールドレンズ１２が配置されており、観測者の目１３に
は空間光変調器６からの光がフィールドレンズ１２を介
して入射される。A field lens 12 is arranged on the path of the light from the spatial light modulator 6, and the light from the spatial light modulator 6 enters the observer's eye 13 through the field lens 12. .

【００２１】上記の構成にて、書き込み用Ｈｅ−Ｎｅレ
ーザ１から分割された参照光３１と原画像５を透過した
物体光３２を空間光変調器６の書き込み面の同一場所に
入射させ、干渉縞として書き込む。同時に読み出し光３
３をガルバノミラー１０を介して、空間光変調器６の読
み出し面に多方向から入射させることにより、２次元ホ
ログラム像をより広い範囲から観察することができ、視
域が拡大する。With the above configuration, the reference light 31 split from the He-Ne laser 1 for writing and the object light 32 transmitted through the original image 5 are made incident on the same location on the writing surface of the spatial light modulator 6 to cause interference. Write as stripes. Read light 3 at the same time
By allowing 3 to enter the read-out surface of the spatial light modulator 6 from multiple directions via the galvano mirror 10, the two-dimensional hologram image can be observed from a wider range and the viewing area is expanded.

【００２２】図２は、本発明のホログラフィックディス
プレイの第２の実施例の構成を示す。図２の実施例は、
空間光変調器６の書き込み面に対する参照光３１及び物
体光３２の入射系と、同じく空間光変調器６の読み込み
面に対する読み出し光３３の入射系とからなる。FIG. 2 shows the configuration of the second embodiment of the holographic display of the present invention. The embodiment of FIG. 2 is
The spatial light modulator 6 includes a reference light 31 and an object light 32 that are incident on the writing surface of the spatial light modulator 6, and a read light 33 that is incident on a reading surface of the spatial light modulator 6.

【００２３】参照光３１及び物体光３２の入射系は、書
き込み用Ｈｅ−Ｎｅレーザ１と、該レーザ１からのビー
ムの光路上に配置され、該ビームを所定の幅を有する平
行光束とするビームエキスパンダー２と、該平行光束に
対して概ね４５°の角度にて配置され、これをそのまま
直進する第１の光束（参照光３１）とそれに対して概ね
直交する第２の光束とに分割するハーフミラー３と、参
照光３１の光路上に配置された空間光変調器６と、第２
の光束の進路上に配置された原画像５と、現画像を透過
してきた物体光３２を空間光変調器６の方に向けるとと
もに、揺動するガルバノミラー２４と、ミラー２４によ
って反射された後の物体光を空間光変調器６上に入射さ
せるレンズ１１とから成る。An incident system of the reference light 31 and the object light 32 is arranged on the writing He-Ne laser 1 and an optical path of a beam from the laser 1, and is a beam for converting the beam into a parallel light flux having a predetermined width. An expander 2 and a half that is arranged at an angle of approximately 45 ° with respect to the parallel light flux and divides this into a first light flux (reference light 31) that travels straight as it is and a second light flux that is substantially orthogonal to it. The mirror 3, the spatial light modulator 6 arranged on the optical path of the reference light 31, and the second
Of the original image 5 arranged on the path of the light flux of, and the object light 32 transmitted through the current image are directed toward the spatial light modulator 6 and oscillated by the galvano mirror 24 and after being reflected by the mirror 24. And the lens 11 for making the object light of (3) incident on the spatial light modulator 6.

【００２４】また、読み出し光３３の入射系は、読み出
し用Ｈｅ−Ｎｅレーザ７と、該レーザ７からのビームの
光路上に配置され、該ビームを所定の幅を有する平行光
束とするビームエキスパンダー８と、該平行光束上に配
置された偏光板９と、偏光板９を通過してきた光束（読
み出し光３３）を空間光変調器６の方に向けるミラー２
０とから成る。Further, the incident system of the reading light 33 is arranged on the reading He-Ne laser 7 and the beam expander 8 which is arranged on the optical path of the beam from the laser 7 and makes the beam a parallel light beam having a predetermined width. And a polarizing plate 9 arranged on the parallel luminous flux, and a mirror 2 for directing the luminous flux (reading light 33) passing through the polarizing plate 9 toward the spatial light modulator 6.
It consists of 0 and.

【００２５】空間光変調器６からの光の進路上にはフィ
ールドレンズ１２が配置されており、観測者の目１３に
は空間光変調器６からの光がフィールドレンズ１２を介
して入射される。A field lens 12 is arranged on the path of the light from the spatial light modulator 6, and the light from the spatial light modulator 6 is incident on the observer's eye 13 through the field lens 12. .

【００２６】上記の構成にて、書き込み用Ｈｅ−Ｎｅレ
ーザ１から分割された参照光３１と、原画像５を透過し
た物体光３２をガルバノミラー２４を介して多方向から
空間光変調器６の書き込み面の同一場所に入射させ、干
渉縞として書き込む。同時に読み出し光３３を空間光変
調器６の読み出し面に入射させれば、２次元ホログラム
像をより広い範囲から観察することができ、視域が拡大
する。With the above structure, the reference light 31 split from the writing He-Ne laser 1 and the object light 32 transmitted through the original image 5 are transmitted from the multi-direction spatial light modulator 6 through the galvano mirror 24. The light is made incident on the same place on the writing surface and written as interference fringes. At the same time, if the reading light 33 is made incident on the reading surface of the spatial light modulator 6, the two-dimensional hologram image can be observed from a wider range and the viewing area is expanded.

【００２７】図３は、本発明のホログラフィックディス
プレイの第３の実施例の構成を示す。図３の実施例は、
空間光変調器６の書き込み面に対する参照光３１及び物
体光３２の入射系と、同じく空間光変調器６の読み込み
面に対する読み出し光３３の入射系とからなる。FIG. 3 shows the configuration of a third embodiment of the holographic display of the present invention. The embodiment of FIG.
The spatial light modulator 6 includes a reference light 31 and an object light 32 that are incident on the writing surface of the spatial light modulator 6, and a read light 33 that is incident on a reading surface of the spatial light modulator 6.

【００２８】参照光３１及び物体光３２の入射系は、書
き込み用Ｈｅ−Ｎｅレーザ１と、該レーザ１からのビー
ムの光路上に配置され、該ビームを所定の幅を有する平
行光束とするビームエキスパンダー２と、該平行光束に
対して概ね４５°の角度にて配置され、これをそのまま
直進する第１の光束（参照光３１）とそれに対して概ね
直交する第２の光束とに分割するハーフミラー３と、参
照光３１の光路上に配置されるとともにガルバノミラー
の如く揺動する光偏向機構付き空間光変調器２６と、第
２の光束を空間光変調器６の方に向けるミラー４と、ミ
ラー４によって反射された後の第２の光束の光路上に配
置された原画像５とから成る。The incident system of the reference light 31 and the object light 32 is arranged on the optical path of the He-Ne laser 1 for writing and the beam from the laser 1, and is a beam for making the beam into a parallel light flux having a predetermined width. An expander 2 and a half that is arranged at an angle of approximately 45 ° with respect to the parallel light flux and divides this into a first light flux (reference light 31) that travels straight as it is and a second light flux that is substantially orthogonal to it. A mirror 3, a spatial light modulator 26 with an optical deflection mechanism that is arranged on the optical path of the reference light 31 and swings like a galvanometer mirror, and a mirror 4 that directs a second light beam toward the spatial light modulator 6. , The original image 5 arranged on the optical path of the second light flux after being reflected by the mirror 4.

【００２９】また、読み出し光３３の入射系は、読み出
し用Ｈｅ−Ｎｅレーザ７と、該レーザ７からのビームの
光路上に配置され、該ビームを所定の幅を有する平行光
束とするビームエキスパンダー８と、該平行光束上に配
置された偏光板９と、偏光板９を通過してきた光束（読
み出し光３３）を空間光変調器６の方に向けるミラー２
０とから成る。The incident system of the reading light 33 is arranged on the reading He-Ne laser 7 and the beam path of the beam from the laser 7, and the beam expander 8 for converting the beam into a parallel light beam having a predetermined width. And a polarizing plate 9 arranged on the parallel luminous flux, and a mirror 2 for directing the luminous flux (reading light 33) passing through the polarizing plate 9 toward the spatial light modulator 6.
It consists of 0 and.

【００３０】空間光変調器２６からの光の進路上にはフ
ィールドレンズ１２が配置されており、観測者の目１３
には空間光変調器２６からの光がフィールドレンズ１２
を介して入射される。The field lens 12 is arranged on the path of the light from the spatial light modulator 26, and the field lens 12 is arranged in the eyes 13 of the observer.
Light from the spatial light modulator 26 is included in the field lens 12
Is incident through.

【００３１】上記の構成にて、書き込み用Ｈｅ−Ｎｅレ
ーザ１から分割された参照光３１と原画像５を透過した
物体光３２を空間光変調器２６の書き込み面の同一場所
に多方向から入射させ、干渉縞として書き込む。同時に
読み出し光３３を光偏向機構付き空間光変調器２６の読
み出し面に多方向から入射させることにより、２次元ホ
ログラム像をより広い範囲から観察することができる。With the above configuration, the reference light 31 split from the writing He-Ne laser 1 and the object light 32 transmitted through the original image 5 are made incident on the same location on the writing surface of the spatial light modulator 26 from multiple directions. And write as interference fringes. At the same time, the two-dimensional hologram image can be observed from a wider range by making the readout light 33 incident on the readout surface of the spatial light modulator with a light deflection mechanism 26 from multiple directions.

【００３２】[0032]

【発明の効果】以上詳細に説明したように、本発明のホ
ログラフィックディスプレイは、ガルバノミラーを用い
て読み出し光、または書き込み光を空間光変調器に対し
て走査する、または空間光変調器をガルバノミラーのよ
うに振ることにより、物体光または読み出し光を空間光
変調器に対して多方向から入射させ、ホログラム像を観
察できる範囲、すなわち視域を拡大することができる。As described in detail above, the holographic display of the present invention scans the reading light or the writing light with respect to the spatial light modulator by using the galvano mirror, or the spatial light modulator by the galvanometer. By swinging like a mirror, the object light or the readout light can be made incident on the spatial light modulator from multiple directions, and the range in which the hologram image can be observed, that is, the visual range can be expanded.

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

【図１】本発明のホログラフィックディスプレイの第１
の実施例の構成図である。FIG. 1 is a first holographic display of the present invention.
It is a block diagram of the Example of.

【図２】本発明のホログラフィックディスプレイの第２
の実施例の構成図である。FIG. 2 is a second holographic display of the present invention.
It is a block diagram of the Example of.

【図３】本発明のホログラフィックディスプレイの第３
の実施例の構成図である。FIG. 3 is a third holographic display of the present invention.
It is a block diagram of the Example of.

【図４】従来のホログラフィックディスプレイの構成図
である。FIG. 4 is a configuration diagram of a conventional holographic display.

【図５】視野と視域の定義を説明するための説明図であ
る。FIG. 5 is an explanatory diagram for explaining definitions of a visual field and a visual field.

【図６】従来の空間光変調器の構成図である。FIG. 6 is a configuration diagram of a conventional spatial light modulator.

【符号の説明】[Explanation of symbols]

１ 書き込み用Ｈｅ−Ｎｅレーザ ２、８ ビームエキスパンダー ３ ハーフミラー ４、２０ ミラー ５ 原画像 ６、２６ 空間光変調器 ７ 読み出し用Ｈｅ−Ｎｅレーザ ９ 偏光板 １０、２４ ガルバノミラー １１ レンズ １２ フィールドレンズ １３ 眼 １４ ホログラム再生像 ３１ 参照光 ３２ 物体光 ３３ 読み出し光 ３４ １次回折光 ３５ 反射光（０次回折光） ４１ 物体 ４２ 視野幅 ４３ 物体の見込み角 ４４ 視域幅 ４５ 物体から見た広がり角 ６１、６２ ガラス基板 ６３、６４ 透明電極 ６５ 光導電層 ６６ 誘電体ミラー ６７ 液晶層 ６８ 交流電圧 1 He-Ne laser for writing 2, 8 Beam expander 3 Half mirror 4, 20 Mirror 5 Original image 6, 26 Spatial light modulator 7 He-Ne laser for reading 9 Polarizing plate 10, 24 Galvano mirror 11 Lens 12 Field lens 13 Eye 14 Hologram reconstructed image 31 Reference light 32 Object light 33 Readout light 34 First-order diffracted light 35 Reflected light (0th-order diffracted light) 41 Object 42 Field-of-view width 43 Object's angle of view 44 Viewing area width 45 View angle from the object 61, 62 Glass substrate 63, 64 Transparent electrode 65 Photoconductive layer 66 Dielectric mirror 67 Liquid crystal layer 68 AC voltage

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 空間光変調器を実時間ホログラムとして
用いたホログラフィックディスプレイにおいて、 読み出し光を空間光変調器に対して走査する手段を備え
ることを特徴とするホログラフィックディスプレイ。1. A holographic display using a spatial light modulator as a real-time hologram, comprising a means for scanning read light with respect to the spatial light modulator. 【請求項２】 空間光変調器を実時間ホログラムとして
用いたホログラフィックディスプレイにおいて、 書き込み光を空間光変調器に対して走査する手段を備え
ることを特徴とするホログラフィックディスプレイの視
域拡大方法。2. A holographic display using a spatial light modulator as a real-time hologram, comprising a means for scanning writing light with respect to the spatial light modulator. 【請求項３】 空間光変調器を実時間ホログラムとして
用いたホログラフィックディスプレイにおいて、 空間光変調器をガルバノミラーのように振る手段を備え
ることを特徴とするホログラフィックディスプレイ。3. A holographic display using a spatial light modulator as a real-time hologram, comprising a means for swinging the spatial light modulator like a galvanometer mirror.
JP94893A 1993-01-07 1993-01-07 Holographic display Pending JPH06202575A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP94893A JPH06202575A (en) 1993-01-07 1993-01-07 Holographic display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP94893A JPH06202575A (en) 1993-01-07 1993-01-07 Holographic display

Publications (1)

Publication Number Publication Date
JPH06202575A true JPH06202575A (en) 1994-07-22

Family

ID=11487905

Family Applications (1)

Application Number Title Priority Date Filing Date
JP94893A Pending JPH06202575A (en) 1993-01-07 1993-01-07 Holographic display

Country Status (1)

Country Link
JP (1) JPH06202575A (en)

Cited By (11)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100754083B1 (en) * 2004-06-07 2007-08-31 삼성전기주식회사 Optical recording apparatus using scanning mirror for controlling 2D light
JP2009524095A (en) * 2006-01-20 2009-06-25 シーリアル テクノロジーズ ソシエテ アノニム Projector for holographic reconstruction of scenes
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JP2011209335A (en) * 2010-03-29 2011-10-20 National Institute Of Information & Communication Technology Apparatus and method for reproducing electronic holography
US9851580B2 (en) 2010-09-07 2017-12-26 Dai Nippon Printing Co., Ltd. Projection type image display apparatus
US10802444B2 (en) 2010-09-07 2020-10-13 Dai Nippon Printing Co., Ltd. Illumination apparatus using a coherent light source
US10523902B2 (en) 2010-09-07 2019-12-31 Dai Nippon Printing Co., Ltd. Scanner device and device for measuring three-dimensional shape of object
US10156732B2 (en) 2010-09-07 2018-12-18 Dai Nippon Printing Co., Ltd. Projection type image display apparatus
US10051243B2 (en) 2010-09-07 2018-08-14 Dai Nippon Printing Co., Ltd. Scanner device and device for measuring three-dimensional shape of object
US9134700B2 (en) 2011-04-27 2015-09-15 Panasonic Intellectual Property Management Co., Ltd. Display device
US9460647B2 (en) 2011-10-20 2016-10-04 Panasonic Intellectual Management Co., Ltd. Image display apparatus
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US9135847B2 (en) 2011-10-20 2015-09-15 Panasonic Intellectual Property Management Co., Ltd. Image display apparatus
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