JP3269168B2 - Amplitude and phase modulator - Google Patents
Amplitude and phase modulatorInfo
- Publication number
- JP3269168B2 JP3269168B2 JP07242493A JP7242493A JP3269168B2 JP 3269168 B2 JP3269168 B2 JP 3269168B2 JP 07242493 A JP07242493 A JP 07242493A JP 7242493 A JP7242493 A JP 7242493A JP 3269168 B2 JP3269168 B2 JP 3269168B2
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- Japan
- Prior art keywords
- liquid crystal
- phase
- amplitude
- light
- 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.)
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Description
【０００１】[0001]
【産業上の利用分野】本発明は光の振幅を変調する液晶
空間光変調器および光の振幅と位相を独立に変調する振
幅位相変調器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal spatial light modulator for modulating light amplitude and an amplitude / phase modulator for independently modulating light amplitude and phase.
【０００２】[0002]
【従来の技術】従来の液晶空間光変調器は光の振幅を変
調する際、光の位相も変化させるものであった。2. Description of the Related Art A conventional liquid crystal spatial light modulator changes the phase of light when modulating the amplitude of light.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の液晶空
間光変調器はこれを波面制御や光シャッターに応用しよ
うとしても位相歪のためにうまく利用できないという問
題があった。また従来の液晶空間光変調器を用いた従来
の振幅位相変調器は振幅と位相を完全には光の振幅と位
相を独立に変調できないという問題があった。本発明
は、このような問題点を解決するものであって、その目
的は、簡便な手段により高性能な振幅位相変調器を提供
するところにある。However, there is a problem that the conventional liquid crystal spatial light modulator cannot be used well due to phase distortion even if it is applied to wavefront control or optical shutter. Further, the conventional amplitude and phase modulator using the conventional liquid crystal spatial light modulator has a problem that the amplitude and the phase cannot be completely modulated independently of the light. The present invention has been made to solve such a problem, and an object of the present invention is to provide a high-performance amplitude / phase modulator by simple means.
【０００４】[0004]
【課題を解決するための手段】本発明の振幅位相変調器
は、光の振幅及び位相を変調する振幅位相変調器におい
て、ホモジニアス配向した液晶を含み、且つ電界制御複
屈折モードである位相変調手段、ねじれ配向した液晶
と、前記液晶に揃って配向した２色性色素と、を含む振
幅変調手段、及び前記振幅変調手段の光入射側に設けら
れた偏光板を具備し、前記偏光板の透過軸と、前記位相
変調手段の液晶のダイレクタ方向と、が平行であり、前
記位相変調手段の液晶のダイレクタ方向と、前記振幅変
調手段の光入射側に位置する液晶のダイレクタ方向と、
が直交することを特徴とする。 SUMMARY OF THE INVENTION An amplitude-phase modulator according to the present invention is an amplitude-phase modulator for modulating the amplitude and phase of light.
Containing a homogeneously aligned liquid crystal and
Phase modulation means in refraction mode, twisted liquid crystal
And a dichroic dye aligned with the liquid crystal.
A width modulation unit, and a light modulation unit provided on the light incident side of the amplitude modulation unit.
The polarizing plate, the transmission axis of the polarizing plate, the phase
The director direction of the liquid crystal of the modulating means is parallel and
The liquid crystal director direction of the phase modulation means and the amplitude change
Director direction of the liquid crystal positioned on the light incident side of the adjusting means,
Are orthogonal to each other.
【０００５】[0005]
【実施例】以下、本発明の参考例としての液晶空間光変
調器の詳細を示す。 （参考例） 図１に本発明の液晶空間光変調器の構成を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a liquid crystal spatial light modulator as a reference example of the present invention will be described.
The details of the controller are shown. ( Reference Example ) FIG. 1 shows a configuration of a liquid crystal spatial light modulator of the present invention.
【０００６】ＴＮモードの液晶空間光変調器の液晶層１
０５に２色性色素１０７を加えた。この液晶に添加され
た色素は液晶ダイレクタ１０６に沿って配向する。Liquid crystal layer 1 of TN mode liquid crystal spatial light modulator
05 was added with dichroic dye 107. The dye added to the liquid crystal is aligned along the liquid crystal director 106.
【０００７】入射側の偏光板１０３の透過軸１１０をＴ
Ｎモードの液晶空間光変調器の入射側の配向方向と直交
させた。The transmission axis 110 of the polarizing plate 103 on the incident side is set to T
The direction was perpendicular to the alignment direction on the incident side of the N-mode liquid crystal spatial light modulator.
【０００８】本実施例では出射側の偏光板１０９は入射
偏光板と透過軸が平行になるように配置した。In this embodiment, the exit-side polarizing plate 109 is arranged so that the transmission axis is parallel to the incident polarizing plate.
【０００９】従来のＴＮモードの液晶空間光変調器では
印加電圧を変えると透過率だけでなく光の位相も変化さ
せる。これを説明する。In a conventional TN mode liquid crystal spatial light modulator, changing the applied voltage changes not only the transmittance but also the phase of light. This will be described.
【００１０】電圧印加時には図２のように液晶ダイレク
タ２０４が入射光の偏光方向２０２に対して垂直になる
ので、どのような偏光も常屈折率のみを感じ、出射光の
位相は一定である。When a voltage is applied, the liquid crystal director 204 is perpendicular to the polarization direction 202 of the incident light as shown in FIG. 2, so that any polarized light has only the ordinary refractive index and the phase of the emitted light is constant.
【００１１】ところが電圧無印加時にはどのような偏光
に対しても電圧印加時に比べて位相がずれる。However, when no voltage is applied, the phase of any polarized light is shifted as compared with when a voltage is applied.
【００１２】図３に従来のＴＮモードの液晶空間光変調
器で位相変化が起こる原理を示す。偏光板を透過した光
３０２は図３（ａ）のようにＴＮモードの液晶空間光変
調器の入射面の液晶ダイレクタ３０１に垂直な方向に偏
光している。すなわちこの光は常光である。FIG. 3 shows the principle that a phase change occurs in a conventional TN mode liquid crystal spatial light modulator. The light 302 transmitted through the polarizing plate is polarized in a direction perpendicular to the liquid crystal director 301 on the incident surface of the TN mode liquid crystal spatial light modulator as shown in FIG. That is, this light is ordinary light.
【００１３】ところがＴＮセルでは液晶がねじれて配向
されているのでこの光３０２に対して液晶ダイレクタが
傾いていく。このため図３（ｂ）のように、常光成分３
０４の他に異常光成分３０５があらわれる。この異常光
は常光に対して位相がずれている。However, in the TN cell, the liquid crystal is twisted and oriented, so that the liquid crystal director tilts with respect to the light 302. Therefore, as shown in FIG.
04, an extraordinary light component 305 appears. This extraordinary light is out of phase with the ordinary light.
【００１４】更に光が進むと更に液晶ダイレクタが傾
き、図３（ｃ）のように、常光成分３０４からは常光成
分３０７と異常光成分３０８、図３（ｄ）のように、異
常光成分３０５からは常光成分３０９と異常光成分３１
０があらわれる。As the light further travels, the liquid crystal director tilts further, and as shown in FIG. 3C, the ordinary light component 307 and the extraordinary light component 308 are converted from the ordinary light component 304, and as shown in FIG. From the ordinary light component 309 and the extraordinary light component 31
0 appears.
【００１５】もともと異常光成分３０５は常光成分３０
４と位相がずれていたので、常光成分３０７と３０９も
位相がずれている。The extraordinary light component 305 is originally the ordinary light component 30
4, the ordinary light components 307 and 309 are also out of phase.
【００１６】このようにして次々に位相のずれた光が重
なってくるので、出射光の位相は常屈折率のみを感じた
場合に比べてずれている。As described above, since the lights whose phases are shifted one after another overlap, the phase of the emitted light is shifted as compared with the case where only the ordinary refractive index is felt.
【００１７】以上は常光を入射した場合であるが、はじ
めから異常光の成分を含んでいれば位相が変化するのは
上の説明からも明らかであろう。The above description is for the case where ordinary light is incident. It will be apparent from the above description that the phase changes if an extraordinary light component is included from the beginning.
【００１８】従来のＴＮセルではこの位相変化は８分の
１波長から波長程度の大きさになる。In a conventional TN cell, this phase change becomes as large as 1/8 wavelength to about wavelength.
【００１９】一方、本発明の液晶空間光変調器では、印
加電圧を変えても光の位相を変化させない。On the other hand, in the liquid crystal spatial light modulator of the present invention, the phase of light does not change even when the applied voltage is changed.
【００２０】まず、電圧印加時には図４のように液晶ダ
イレクタ４０４が入射光の偏光方向に対して垂直になる
ので、入射光は常屈折率のみを感じる。このとき２色性
色素４０７も液晶と一緒に配向するが、位相変化も与え
ないし、光を吸収することもない。First, when a voltage is applied, the liquid crystal director 404 is perpendicular to the polarization direction of the incident light as shown in FIG. 4, so that the incident light feels only the ordinary refractive index. At this time, the dichroic dye 407 also aligns with the liquid crystal, but does not change the phase and does not absorb light.
【００２１】電圧無印加時には、液晶を透過して現れた
異常光は直ちに２色性色素によって吸収される。このた
め従来のＴＮモードの液晶空間光変調器のように常光に
位相のずれた成分が重なるというようなことがなく、出
射光は常屈折率のみを感じた場合（電圧印加時）と同じ
位相で出射される。When no voltage is applied, the extraordinary light that appears through the liquid crystal is immediately absorbed by the dichroic dye. Therefore, unlike the conventional TN mode liquid crystal spatial light modulator, the component having a phase shift does not overlap with the ordinary light, and the emitted light has the same phase as that in the case where only the ordinary refractive index is felt (when voltage is applied). Is emitted.
【００２２】すなわち本参考例のＴＮモードの液晶空間
光変調器では位相変化を伴わずに光の振幅のみを変化さ
せることができる。That is, in the TN mode liquid crystal spatial light modulator of the present embodiment , only the amplitude of light can be changed without a phase change.
【００２３】本参考例では、偏光板の配置は平行ニコル
（電圧無印加時に消光状態となるノーマリーブラック）
であり、染料の吸収によってコントラスト比も向上す
る。直交ニコルの場合でも入射側の偏光板が本発明の配
置であれば光の位相は変化しない。In this embodiment , the polarizing plate is arranged in a parallel Nicol state (normally black, which is in an extinction state when no voltage is applied).
The contrast ratio is also improved by the absorption of the dye. Even in the case of orthogonal Nicols, the phase of light does not change if the incident side polarizing plate is arranged according to the present invention.
【００２４】なお、本参考例では２色性色素として三井
東圧染料（株）製のＳ−３４４を使用した。In the present embodiment , S-344 manufactured by Mitsui Toatsu Dye Co., Ltd. was used as the dichroic dye.
【００２５】本参考例のＴＮモードの液晶空間光変調器
をローマン（Ｌｏｈｍａｎｎ）型やリー（Ｌｅｅ）型の
ような振幅ホログラムの記録に利用すれば位相歪のない
良好な再生像が得られる。If the TN mode liquid crystal spatial light modulator of this embodiment is used for recording an amplitude hologram such as a Lohmann type or a Lee type, a good reproduced image without phase distortion can be obtained.
【００２６】また、本参考例のＴＮモードの液晶空間光
変調器を用いると波面を乱さない液晶シャッターが実現
する。これは各種情報処理や画像処理に応用できる。 （実施例） 図５に実施例に係る振幅位相変調器の構成を示す。When the TN mode liquid crystal spatial light modulator of this embodiment is used, a liquid crystal shutter which does not disturb the wavefront is realized. This can be applied to various information processing and image processing. Shows the structure of (Example) amplitude and phase modulator according to the embodiment in FIG.
【００２７】本発明の振幅位相変調器は実施例１のＴＮ
モードの液晶空間光変調器５０３とホモジニアス配向型
ＥＣＢ（電界制御複屈折）モードの液晶空間光変調器５
０２を画素を揃えてはりあわせたものである。The amplitude and phase modulator according to the present invention employs the TN
Mode liquid crystal spatial light modulator 503 and homogeneous alignment type ECB (electric field controlled birefringence) mode liquid crystal spatial light modulator 5
02 is obtained by aligning the pixels.
【００２８】ＥＣＢモードの液晶空間光変調器は理想的
には光の振幅を変化させることなく位相を変調できる。
しかし実際には図６に示すような透過率変化をおこす場
合がある。An ECB mode liquid crystal spatial light modulator can ideally modulate the phase without changing the amplitude of light.
However, the transmittance may actually change as shown in FIG.
【００２９】本実施例の振幅位相変調器はこのようなＥ
ＣＢモードの液晶空間光変調器を用いても光の振幅と位
相を独立に変調することを可能にするものである。The amplitude and phase modulator of the present embodiment has such an E
Even if a CB mode liquid crystal spatial light modulator is used, the amplitude and phase of light can be independently modulated.
【００３０】図７に本実施例の振幅位相変調器の液晶ダ
イレクタと偏光板の配置を示す。本実施例の振幅位相変
調器はＥＣＢモードの液晶空間光変調器を光の入射側に
配置する。入射側の偏光板７０３は透過軸７１０がＥＣ
Ｂモードの液晶空間光変調器の液晶ダイレクタ７０４に
平行になるようにする。入射光はＥＣＢモードの液晶空
間光変調器によって位相変調をうける。このとき偏光状
態は変化しない。従って、ＴＮモードの液晶空間光変調
器に入射するときも直線偏光のままである。FIG. 7 shows the arrangement of the liquid crystal director and the polarizing plate of the amplitude and phase modulator of the present embodiment . In the amplitude and phase modulator according to the present embodiment, an ECB mode liquid crystal spatial light modulator is arranged on the light incident side. The transmission axis 710 of the polarizing plate 703 on the incident side is EC
The liquid crystal is set to be parallel to the liquid crystal director 704 of the B mode liquid crystal spatial light modulator. The incident light undergoes phase modulation by an ECB mode liquid crystal spatial light modulator. At this time, the polarization state does not change. Therefore, even when the light enters the TN mode liquid crystal spatial light modulator, it remains linearly polarized.
【００３１】ＴＮモードの液晶空間光変調器の入射側の
液晶ダイレクタ１０６はこの偏光方向（すなわちＥＣＢ
モードの液晶空間光変調器のダイレクタの方向）に直交
するようにしてある。このため参考例の場合と同様に、
入射光は位相変調を受けることなく振幅変調される。The liquid crystal director 106 on the incident side of the TN mode liquid crystal spatial light modulator has this polarization direction (that is, ECB).
Mode (the direction of the director of the liquid crystal spatial light modulator). Therefore, as in the case of the reference example ,
The incident light is amplitude-modulated without undergoing phase modulation.
【００３２】光の振幅と位相を独立に変調するために
は、振幅位相変調器に入力するデータを修正する。In order to independently modulate the amplitude and phase of light, data input to the amplitude / phase modulator is modified.
【００３３】液晶空間光変調器の駆動装置はあらかじめ
求めておいたＥＣＢモードの液晶空間光変調器の透過率
変化と位相変化を記憶している。The driving device of the liquid crystal spatial light modulator stores a change in transmittance and a change in phase of the liquid crystal spatial light modulator in the ECB mode which have been obtained in advance.
【００３４】この駆動装置は位相データを受け取ると、
記憶内容をもとに、透過率の補正量を求め、この透過率
に対応する駆動信号をＴＮモードの液晶空間光変調器に
入力する。When the driving device receives the phase data,
A correction amount of the transmittance is obtained based on the stored contents, and a drive signal corresponding to the transmittance is input to a TN mode liquid crystal spatial light modulator.
【００３５】これによって与えられた振幅・位相データ
どおりの正確な変調ができた。このため本実施例の振幅
位相変調器を３次元像再生に応用すると、ノイズの少な
い良好な再生像が得られた。またこの振幅位相変調器を
各種情報処理や画像処理、波面計測、波面補正などのあ
らゆる分野に応用できるようになった。As a result, accurate modulation was performed according to the given amplitude / phase data. Therefore, when the amplitude and phase modulator of the present embodiment was applied to three-dimensional image reproduction, a good reproduced image with less noise was obtained. Further, the amplitude and phase modulator can be applied to various fields such as various information processing, image processing, wavefront measurement, and wavefront correction.
【００３６】なお、本実施例では一体型の振幅位相変調
器について述べたが、この他にもアフォーカル光学系で
ＴＮモードの液晶空間光変調器とＥＣＢモードの液晶空
間光変調器を接続するような構成も可能である。In this embodiment, the integrated amplitude / phase modulator has been described. In addition, a TN mode liquid crystal spatial light modulator and an ECB mode liquid crystal spatial light modulator are connected by an afocal optical system. Such a configuration is also possible.
【００３７】本実施例の振幅位相変調器は透過率変化を
起こすＥＣＢモードの液晶空間光変調器を用いても光の
振幅と位相を独立に変調することを可能にするため、素
子設計の自由度が向上する。The amplitude and phase modulator of this embodiment can freely modulate the amplitude and phase of light even if an ECB mode liquid crystal spatial light modulator that causes a change in transmittance is used. The degree improves.
【００３８】以上本発明の実施例について述べてきた
が、本発明はこのほかにも、広く表示装置などに応用が
可能である。Although the embodiments of the present invention have been described above, the present invention can be widely applied to other display devices and the like.
【００３９】[0039]
【発明の効果】本発明の振幅位相変調器によれば、ホモ
ジニアス配向型であるＥＣＢモードである位相変調手段
を有し、偏光板の透過軸と、位相変調手段の液晶のダイ
レクタ方向と、が平行であるので、偏光板を透過した光
の位相変調が可能となる。そして、ねじれ配向した液晶
に揃うように配向した２色性色素を含む振幅変調手段を
有し、その位相変調手段の液晶のダイレクタ方向と振幅
変調手段の光入射側に位置する液晶のダイレクタ方向
と、が直交するので、位相変調された光の位相を再び変
調することなく振幅変調することができる。 According to the amplitude phase modulator of the present invention according to the present invention, homo
Phase modulation means of an ECB mode of a genuine orientation type
Having a transmission axis of a polarizing plate and a liquid crystal die of a phase modulating means.
The light transmitted through the polarizing plate is parallel to the
Is possible. And the liquid crystal with twist alignment
Amplitude modulating means containing dichroic dyes aligned so that
And the director direction and amplitude of the liquid crystal of the phase modulating means
The director direction of the liquid crystal located on the light incident side of the modulation means
And are orthogonal, so the phase of the phase-modulated light is changed again.
The amplitude can be modulated without tuning.
【００４０】すなわち、振幅変調と位相変調とが各々独That is, each of the amplitude modulation and the phase modulation is independent.
立して行われるので、振幅を調整するときは振幅変調手When adjusting the amplitude, use the amplitude modulation method.
段を、位相を変調するときは振幅変調手段を、各々制御Controls the stages and the amplitude modulation means when modulating the phase
すればよいので、高精度な光波面制御が可能となる。As a result, highly accurate light wavefront control can be performed.
【図１】 参考例に係る液晶空間光変調器の構成を示す
斜視図である。FIG. 1 is a perspective view illustrating a configuration of a liquid crystal spatial light modulator according to a reference example .
【図２】 従来の液晶空間光変調器の電圧印加時の様子
を示す側面図である。FIG. 2 is a side view showing a state when a voltage is applied to a conventional liquid crystal spatial light modulator.
【図３】 従来のＴＮモードの液晶空間光変調器で位相
変化が起こる原理を示す図である。FIG. 3 is a diagram showing a principle of a phase change occurring in a conventional TN mode liquid crystal spatial light modulator.
【図４】 本発明の参考例に係る液晶空間光変調器の電
圧印加時の様子を示す側面図である。FIG. 4 is a side view showing a state when a voltage is applied to a liquid crystal spatial light modulator according to a reference example of the present invention .
【図５】 本発明の実施例に係る振幅位相変調器の構成
を示す側面図である。FIG. 5 is a side view showing a configuration of the amplitude and phase modulator according to the embodiment of the present invention .
【図６】 本発明の実施例に係るＥＣＢモードの液晶空
間光変調器の振幅および位相変調特性を示す図である。FIG. 6 is a diagram showing amplitude and phase modulation characteristics of an ECB mode liquid crystal spatial light modulator according to an embodiment of the present invention .
【図７】 本発明の実施例に係る振幅位相変調器の構成
を示す斜視図である。FIG. 7 is a perspective view illustrating a configuration of an amplitude and phase modulator according to an embodiment of the present invention .
１０１ 入射側偏光板の透過軸に垂直な偏光成分 １０２ 入射側偏光板の透過軸に平行な偏光成分 １０３ 入射側の偏光板 １０４ 偏光板を透過した光 １０５ 液晶層 １０６ 液晶ダイレクタ １０７ ２色性色素 １０８ 液晶によって変調された光 １０９ 出射側の偏光板 １１０ 偏光板の透過軸 ２０１ 偏光板 ２０２ 入射光の偏光方向 ２０３ 電極 ２０４ 液晶ダイレクタ ２０５ 電極 ２０６ 偏光板 ３０１ 入射面の液晶ダイレクタ ３０２ 偏光板を透過した光 ３０３ 液晶ダイレクタ ３０４ 常光成分 ３０５ 異常光成分 ３０６ 液晶ダイレクタ ３０７ 常光成分 ３０８ 異常光成分 ３０９ 常光成分 ３１０ 異常光成分 ４０１ 偏光板 ４０２ 入射光の偏光方向 ４０３ 電極 ４０４ 液晶ダイレクタ ４０５ 電極 ４０６ 偏光板 ４０７ ２色性色素 ５０１ 偏光板 ５０２ ＴＮモードの液晶空間光変調器 ５０３ ＥＣＢモードの液晶空間光変調器 ５０４ 偏光板 ７０１ 入射側偏光板の透過軸に垂直な偏光成分 ７０２ 入射側偏光板の透過軸に平行な偏光成分 ７０３ 入射側の偏光板 ７０４ 液晶ダイレクタ ７０８ 液晶によって変調された光 ７０９ 出射側の偏光板 ７１０ 偏光板の透過軸 101 Polarization component perpendicular to the transmission axis of the incident-side polarizing plate 102 Polarization component parallel to the transmission axis of the incident-side polarizing plate 103 Incident-side polarizing plate 104 Light transmitted through the polarizing plate 105 Liquid crystal layer 106 Liquid crystal director 107 Dichroic dye 108 light modulated by liquid crystal 109 outgoing side polarizer 110 transmission axis of polarizer 201 polarizer 202 polarization direction of incident light 203 electrode 204 liquid crystal director 205 electrode 206 polarizer 301 liquid crystal director 302 on incident surface transmitted through polarizer Light 303 liquid crystal director 304 ordinary light component 305 extraordinary light component 306 liquid crystal director 307 ordinary light component 308 extraordinary light component 309 ordinary light component 310 extraordinary light component 401 polarizing plate 402 polarization direction of incident light 403 electrode 404 liquid crystal director 405 electrode 406 polarizing plate 407 2 colors Sex dye 501 Polarizing plate 502 TN mode liquid crystal spatial light modulator 503 ECB mode liquid crystal spatial light modulator 504 Polarizing plate 701 Polarized component perpendicular to transmission axis of incident side polarizing plate 702 Polarized component parallel to transmission axis of incident side polarizing plate 703 Incident side polarizing plate 704 Liquid crystal director 708 Light modulated by liquid crystal 709 Outgoing side polarizing plate 710 Transmission axis of polarizing plate
フロントページの続き (56)参考文献 特開 平４−226426（ＪＰ，Ａ) 特開 昭62−89027（ＪＰ，Ａ) 特開 昭58−224332（ＪＰ，Ａ) 特開 昭58−70213（ＪＰ，Ａ) 特開 平４−204828（ＪＰ，Ａ) 特開 平４−158332（ＪＰ，Ａ) 特開 平４−293013（ＪＰ，Ａ) 特開 平５−66377（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02F 1/13 G02F 1/1347 G02F 1/137 Continuation of front page (56) References JP-A-4-226426 (JP, A) JP-A-62-89027 (JP, A) JP-A-58-224332 (JP, A) JP-A-58-70213 (JP, A) JP-A-4-204828 (JP, A) JP-A-4-158332 (JP, A) JP-A-4-29313 (JP, A) JP-A-5-66377 (JP, A) (58) Field surveyed (Int.Cl. 7 , DB name) G02F 1/13 G02F 1/1347 G02F 1/137
Claims (1)
器において、 ホモジニアス配向した液晶を含み、且つ電界制御複屈折
モードである位相変調手段、 ねじれ配向した液晶と、前記液晶に揃って配向した２色
性色素と、を含む振幅変調手段、及び前記振幅変調手段
の光入射側に設けられた偏光板を具備し、 前記偏光板の透過軸と、前記位相変調手段の液晶のダイ
レクタ方向と、が平行であり、 前記位相変調手段の液晶のダイレクタ方向と、前記振幅
変調手段の光入射側に位置する液晶のダイレクタ方向
と、が直交することを特徴とする振幅位相変調器。 An amplitude and phase modulation for modulating the amplitude and phase of light.
, Containing homogeneously aligned liquid crystal and electric field controlled birefringence
Mode modulating means, twisted liquid crystal, and two colors aligned with the liquid crystal
Amplitude modulating means including a sex dye, and the amplitude modulating means
And a transmission axis of the polarizing plate and a liquid crystal die of the phase modulating means.
The direction of the liquid crystal of the phase modulating means and the amplitude
The director direction of the liquid crystal located on the light incident side of the modulation means
And an orthogonal phase modulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07242493A JP3269168B2 (en) | 1993-03-30 | 1993-03-30 | Amplitude and phase modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07242493A JP3269168B2 (en) | 1993-03-30 | 1993-03-30 | Amplitude and phase modulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06289353A JPH06289353A (en) | 1994-10-18 |
| JP3269168B2 true JP3269168B2 (en) | 2002-03-25 |
Family
ID=13488902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07242493A Expired - Fee Related JP3269168B2 (en) | 1993-03-30 | 1993-03-30 | Amplitude and phase modulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3269168B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007028371B4 (en) * | 2007-06-13 | 2012-05-16 | Seereal Technologies S.A. | Device for light modulation |
| US10248081B2 (en) | 2017-03-10 | 2019-04-02 | Microsoft Technology Licensing, Llc | Holographic phase and amplitude spatial light modulation |
-
1993
- 1993-03-30 JP JP07242493A patent/JP3269168B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06289353A (en) | 1994-10-18 |
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