JPS60169825A - Reflection type optical shutter array - Google Patents
Reflection type optical shutter arrayInfo
- Publication number
- JPS60169825A JPS60169825A JP2499784A JP2499784A JPS60169825A JP S60169825 A JPS60169825 A JP S60169825A JP 2499784 A JP2499784 A JP 2499784A JP 2499784 A JP2499784 A JP 2499784A JP S60169825 A JPS60169825 A JP S60169825A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- light
- optical shutter
- shutter array
- polarizing plate
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/03—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/055—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect the active material being a ceramic
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Nonlinear Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は電気光学効果を有するＰＬＺＴ等の素材を用い
た光シヤツタアレイに関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an optical shutter array using a material such as PLZT having an electro-optic effect.
〈従来技術〉
一般に、ＰＬＺＴは光学的に透明な電気光学セラミック
ス（Ｐａ、Ｌａ）（Ｚｒ、Ｔｉ）０３ （Ｄ 略称で、
その性質を用いた光シャッタへの応用がなされている。<Prior art> In general, PLZT is an optically transparent electro-optic ceramic (Pa, La) (Zr, Ti) 03 (D abbreviation:
This property has been applied to optical shutters.
従来、この種の光シャッタでは、第１図のように偏光方
向が互いに直交する２枚の偏光板（１）’（２）’の間
にＰＬＺＴ素子（３）′を配置して偏光板（２）“から
出光する直進光をＯＮ、ＯＦＦする直進型光シャッタア
レイが知られている。Conventionally, in this type of optical shutter, as shown in FIG. 2) A linear optical shutter array is known that turns on and off the linear light emitted from the light source.
しかるに、この直進型光シャッタアレイによると、直進
出光をスイッチングすることばできでも、光源側へ反射
させる場合のスイッチングは不可能である。すなわち、
出光側に反射板（５）°を置いた場合、Ｐ Ｌ Ｚ Ｔ
（３）’の電圧がＯのときこれを通過する入射光は偏
光板（２）゛により阻止され出光はＯＦＦされている。However, according to this straight type optical shutter array, although it is possible to switch straight light, it is impossible to switch when the light is reflected toward the light source. That is,
When a reflector plate (5)° is placed on the light output side, P L Z T
When the voltage of (3)' is O, the incident light passing through it is blocked by the polarizing plate (2)' and the light output is turned off.
一方Ｐ Ｌ Ｚ Ｔ （３）’に電圧を印加するとこれ
を通過する入射光は偏光板（２）°を通過するが、反射
板（５）゛によりそのま〜の振動面で反射した復路光は
偏光板（２）“およびＰ Ｌ Ｚ Ｔ （３）’を通過
できても透過軸の異なる偏光板（１）“は通過できない
。従って、光源側から見ると、ＰＬ Ｚ Ｔ （３）“
の電圧変化に関係なく常に暗視野であり、スイッチング
作用はないものである。On the other hand, when a voltage is applied to P L Z T (3)', the incident light that passes through it passes through the polarizing plate (2), but the return light is reflected by the reflection plate (5) on the same vibration plane. Although it can pass through the polarizing plate (2) and P L Z T (3)', it cannot pass through the polarizing plate (1), which has a different transmission axis. Therefore, when viewed from the light source side, PL Z T (3) “
It is always a dark field regardless of voltage changes, and there is no switching effect.
〈発明の目的・構成・作用〉
本発明は上記のように不可能であった反射光のスイッチ
ングを可能とするために提供された全く新規の発明であ
り、その目的は円偏光板と、電気光学セラミックス板と
、反射板とを順次配列することにより、反射光をスイッ
チング可能に設けてなる反射型光シャッタアレイ、によ
って達成される。<Purpose, structure, and operation of the invention> The present invention is a completely new invention provided to enable switching of reflected light, which has been impossible as described above. This is achieved by a reflective optical shutter array in which reflected light can be switched by sequentially arranging optical ceramic plates and reflective plates.
次に、本発明を第２図以下により更に詳しく説明するこ
ととする。Next, the present invention will be explained in more detail with reference to FIG. 2 and subsequent figures.
第２図、第３図には本発明の構成模式図が示されており
、（１）は光軸Ｘ、Ｙを第２図のように４５６傾斜させ
て偏光方向を矢印（Ｋ）方向とした直線偏光膜、（４）
は％波長位相差板であり、直線偏光板（１）との組合せ
で円偏光板（１０）を形成している。（３）は櫛型電極
を上記矢印（Ｋ）方向に灯して４５°の角度で交叉する
ように配置したＰＬＺＴ、（５）は金属、ガラス等を素
材とする反射板である。FIGS. 2 and 3 show schematic diagrams of the configuration of the present invention, and (1) shows that the optical axes X and Y are tilted by 456 degrees as shown in FIG. linear polarizing film, (4)
is a % wavelength retardation plate, which forms a circularly polarizing plate (10) in combination with the linearly polarizing plate (1). (3) is a PLZT in which comb-shaped electrodes are illuminated in the direction of the arrow (K) and arranged so as to intersect at an angle of 45°, and (5) is a reflective plate made of metal, glass, or the like.
尚、該反射板（５）は偏光性を妨げないものを用いるも
のとする。Note that the reflecting plate (5) should be one that does not interfere with polarization.
いま、第３図においてＰ Ｌ Ｚ Ｔ （３）の電圧を
Ｏとしたとき、光源からの入射光（Ａ）は直線偏光膜（
１）により光波のうちＹ軸の振動面（Ｂ）のみが通過し
、次いで、複屈折体よりなる％波長位相差板（４）を通
過すると反時計方向回りの局位相差円偏光波（ＣＩ）と
なってＰＬＺ Ｔ （３）に向う。このときＰ Ｌ Ｚ
Ｔ （３）は分極を生じていないので該円偏光波（Ｃ
１）はそのまま通過（円偏光波（０２）） ｌ、反射板
（５）に至る。該反射板（５）で反射した該円偏光波（
Ｃ３）は電波反位相差ではあるが回転方向は逆となって
時計方向回りに進行しそのままＰＬＺＴ（３）を通過（
円偏光波（０４）） した後、％位相差板（４）に至る
。而して、該位相差板（４）を通過するとき、進行光は
更に％波長のずれを生じるので透過後は合計展波長の位
相差の常光線と異常光線となる。すなわち、両光線の合
成光波（Ｄ）はＺ軸を振動面とする直線偏光となり、Ｙ
軸を透過軸とする偏光膜（１）を逆通過することはでき
ない。従って、反射光はＯＦＦされて反射板（５）面は
暗視野となる。 次に、Ｐ Ｌ Ｚ Ｔ （３）に電圧
を印加すると、円偏光波（Ｃ１）は４５°＝％の位相捩
りが加えられた円偏光波（Ｃ２）となって反射板（５）
で反射する。反射した逆回転円偏光波（Ｃ３）は％位相
が捩られたまま再度Ｐ Ｌ Ｚ Ｔ （３）を通過し、
このとき更に４５°＝只の位相捩りが加えられてＰ Ｌ
Ｚ Ｔ （３）の往復で合計局＝９０°の位相捩りが
加えられた円偏光波（Ｃ４）となって、再び位相差板（
４）を透過する。ここで、常光線と異常光線の位相差は
％波長位相差板（４）の往復により％波長位相差となっ
てその合成波が直線偏光（Ｄｏ）として生じるが、すで
にＰ Ｌ Ｚ Ｔ （３）の往復通過により局の位相捩
りがなされているので、その振動面％＋％＝ １すなわ
ち１８０６捩られたＹ軸となる。従って、Ｙ軸を透過軸
とする直線偏光板（１）を逆通過できるので、反射光は
ＯＮとなり、反射板（５）面は明視野となる。Now, in Fig. 3, when the voltage of P L Z T (3) is O, the incident light (A) from the light source is reflected by the linearly polarizing film (
1), only the Y-axis vibration plane (B) of the light wave passes through, and then when it passes through the % wavelength retardation plate (4) made of a birefringent material, it becomes a counterclockwise local phase difference circularly polarized wave (CI ) and heads for PLZ T (3). At this time P L Z
T (3) is not polarized, so the circularly polarized light wave (C
1) passes through as it is (circularly polarized wave (02)) l and reaches the reflection plate (5). The circularly polarized light wave (
C3) has a radio wave anti-phase difference, but the rotation direction is reversed, and it travels clockwise and passes through PLZT (3) as it is (
After the circularly polarized light wave (04), it reaches the retardation plate (4). When passing through the retardation plate (4), the traveling light further undergoes a % wavelength shift, so that after passing through the light, the light becomes an ordinary ray and an extraordinary ray with a phase difference of the total extended wavelength. In other words, the combined light wave (D) of both rays becomes linearly polarized light with the Z-axis as the vibration plane, and Y
It is not possible to reversely pass through the polarizing film (1) whose axis is the transmission axis. Therefore, the reflected light is turned off and the surface of the reflector (5) becomes a dark field. Next, when a voltage is applied to P L Z T (3), the circularly polarized light wave (C1) becomes a circularly polarized light wave (C2) with a phase twist of 45°=%, and the circularly polarized light wave (C2) is applied to the reflector plate (5).
reflect. The reflected counter-rotating circularly polarized light wave (C3) passes through P L Z T (3) again with its % phase twisted,
At this time, a phase twist of only 45° is added and P L
Z
4). Here, the phase difference between the ordinary ray and the extraordinary ray becomes a % wavelength phase difference due to the reciprocation of the % wavelength retardation plate (4), and the synthesized wave is generated as linearly polarized light (Do), but it is already P L Z T (3 ), the phase of the station is twisted by the reciprocating passage of ), so the vibration plane %+%=1, that is, the Y axis is twisted by 1806. Therefore, since the light can pass through the linear polarizing plate (1) whose transmission axis is the Y-axis in the reverse direction, the reflected light is turned on and the surface of the reflecting plate (5) becomes a bright field.
上記の構成・作用により、Ｐ Ｌ Ｚ Ｔ （３）の電
源の開閉により反射面からの反射光をＯＮ。With the above configuration and operation, the light reflected from the reflective surface is turned on by opening and closing the power supply of P L Z T (3).
ＯＦＦスイッチングすることができるものである。It can be turned off.
〈実施例〉
本発明は第１に、第３図に示すように各構成部材を光の
進行方向に対して直角に配置することにより、反射板（
５）面を鏡として用い、該鏡面をＯＮ、ＯＦＦする場合
に適用される。 第２に、第４図に示すように、光の進
行方向に対して各構成部材を傾斜して配置することによ
り、カメラ、ビデオ撮影機、その他の光学系の一部に適
用し、受光面（７）への光シャッタとすることができる
。図中（６）は集光レンズである。<Example> Firstly, the present invention provides a reflection plate (
5) Applicable when a surface is used as a mirror and the mirror surface is turned on and off. Second, as shown in Figure 4, by arranging each component at an angle with respect to the direction in which light travels, it can be applied to cameras, video cameras, and other optical systems, and the light-receiving surface (7) It can be used as a light shutter. In the figure, (6) is a condenser lens.
尚、上記構成部材（１）、（４）、（３）、（５）を個
別に配列すること、又はその全部もしくは一部を一体的
に固着配列することは選択的実施例である。It should be noted that arranging the constituent members (1), (4), (3), and (5) individually, or arranging all or part of them integrally, is an optional embodiment.
く効果〉
本発明によれば、従来不可能とされた反射復路光のスイ
ッチングが可能となるものである。しかも、円偏光板に
おけるＯＦＦ時の往復透過率（ｆ）はｆ＜０．．００４
であるので極めて良好なスイッチング効果を持つもので
ある。Effects> According to the present invention, it becomes possible to switch reflected return light, which was previously considered impossible. Moreover, the round trip transmittance (f) of the circularly polarizing plate when it is OFF is f<0. ．． 004
Therefore, it has an extremely good switching effect.
第１図は従来の光シヤツタアレイを示す構成模式図、第
２図および第３図は本発明に係る反射型光シャッタアレ
イを示す構成模式図、第４図は光学系に適用した実施例
を示す構成模式図である。
（１）・・・・・・直線偏光板、
（４）・・・・・・嵐波長位相差板、
（３）・・・・・・ＰＬＺＴ、（５）・・・・・・反射
板、（１０）・・・・・・円偏光板。
第１図
第２図Fig. 1 is a schematic configuration diagram showing a conventional optical shutter array, Figs. 2 and 3 are schematic configuration diagrams showing a reflective optical shutter array according to the present invention, and Fig. 4 shows an embodiment applied to an optical system. It is a configuration schematic diagram. (1)...Linear polarizing plate, (4)...Arashi wavelength retardation plate, (3)...PLZT, (5)...Reflector plate , (10)...Circularly polarizing plate. Figure 1 Figure 2
Claims (1)
を順次配列することにより、反射光をスイッチング可能
に設けてなる反射型光シャッタアレイ。 ２、円偏光板と、電気光学セラミックス板と、反射板と
を一体的に固着せしめてなる前記特許請求の範囲第１項
記載の反射型光シャッタアレイ。 ３、円偏光板が、直線偏光膜と％波長位相差板により形
成されてなる前記特許請求の範囲第１項又は第２項のい
ずれかに記載の反射型光シャッタアレイ。[Scope of Claims] 1. A reflective optical shutter array in which reflected light can be switched by sequentially arranging a circularly polarizing plate, an electro-optic ceramic plate, and a reflecting plate. 2. A reflective optical shutter array according to claim 1, which comprises a circularly polarizing plate, an electro-optic ceramic plate, and a reflecting plate that are integrally fixed. 3. The reflective optical shutter array according to claim 1 or 2, wherein the circularly polarizing plate is formed of a linearly polarizing film and a % wavelength retardation plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2499784A JPS60169825A (en) | 1984-02-15 | 1984-02-15 | Reflection type optical shutter array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2499784A JPS60169825A (en) | 1984-02-15 | 1984-02-15 | Reflection type optical shutter array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60169825A true JPS60169825A (en) | 1985-09-03 |
Family
ID=12153613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2499784A Pending JPS60169825A (en) | 1984-02-15 | 1984-02-15 | Reflection type optical shutter array |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60169825A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0248634A (en) * | 1988-07-05 | 1990-02-19 | Kaiser Aerospace & Electron Corp | Stereoscopic display device |
| KR20030087093A (en) * | 2002-05-06 | 2003-11-13 | 현대자동차주식회사 | Light-exclusion glass for low voltage |
-
1984
- 1984-02-15 JP JP2499784A patent/JPS60169825A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0248634A (en) * | 1988-07-05 | 1990-02-19 | Kaiser Aerospace & Electron Corp | Stereoscopic display device |
| KR20030087093A (en) * | 2002-05-06 | 2003-11-13 | 현대자동차주식회사 | Light-exclusion glass for low voltage |
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