JPH0372961B2 - - Google Patents
Info
- Publication number
- JPH0372961B2 JPH0372961B2 JP57122641A JP12264182A JPH0372961B2 JP H0372961 B2 JPH0372961 B2 JP H0372961B2 JP 57122641 A JP57122641 A JP 57122641A JP 12264182 A JP12264182 A JP 12264182A JP H0372961 B2 JPH0372961 B2 JP H0372961B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- film
- flat plate
- transparent flat
- emitted
- 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.)
- Expired - Lifetime
Links
- 230000010287 polarization Effects 0.000 claims description 30
- 238000000926 separation method Methods 0.000 claims description 26
- 239000010408 film Substances 0.000 description 35
- 239000011521 glass Substances 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Description
【発明の詳細な説明】
(a) 発明の技術分野
本発明は、光回路素子に係り、とくに光スイツ
チ、光サーキユレーター等に用いられる偏光素子
に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to optical circuit elements, and particularly to polarizing elements used in optical switches, optical circulators, and the like.
(b) 技術の背景
現在実用化されている光回路においては、第１
図に示すような偏光素子１および２とフアラデー
回転素子３から成る光スイツチが用いられてい
る。またこれらの組合せを基本として成る光サー
キユレーター等も用いられている。(b) Background of the technology In optical circuits currently in practical use, the first
An optical switch consisting of polarizing elements 1 and 2 and a Faraday rotation element 3 as shown in the figure is used. Optical circulators and the like based on a combination of these are also used.
第１図において、偏光素子１にＸ１の方向から
入射した光は偏光分離膜１１によつて実線表示の
水平偏波と破線表示の垂直偏波とに分離される。 In FIG. 1, light incident on the polarizing element 1 from the direction X1 is separated by the polarization separation film 11 into horizontally polarized light shown by a solid line and vertically polarized light shown by a broken line.
すなわち、通常、入射光に含まれる水平偏波は
偏光分離膜を透過するのに対し、垂直偏波は該偏
光分離膜によつて反射されるためである。 That is, normally, horizontally polarized waves contained in incident light are transmitted through the polarization separation film, whereas vertically polarized waves are reflected by the polarization separation film.
第１図において、水平偏波は偏光分離膜１１を
透過し、偏光素子１の反射面１２によつて反射さ
れた後、フアラデー回転素子３に入射し、一方、
垂直偏波は偏光分離膜１１によつて反射されフア
ラデー回転素子３に入射する。 In FIG. 1, the horizontally polarized wave passes through the polarization separation film 11, is reflected by the reflective surface 12 of the polarizing element 1, and then enters the Faraday rotation element 3;
The vertically polarized wave is reflected by the polarization separation film 11 and enters the Faraday rotation element 3.
これら分離された光は、フアラデー回転素子３
によつてその偏光面を回転されない時にはフアラ
デー偏光回転素子３をそのまま透過し、偏光素子
２に入射する。この場合、偏光素子２の偏光分離
膜２１に入射した前記水平偏波はこれを透過し、
Ｙ１の方向に出射し、また前記垂直偏波は偏光素
子２の反射面２２により反射され偏光分離膜２１
に入射するが、ここで再び反射されＹ１の方向に
出射する。 These separated lights are transferred to the Faraday rotation element 3
When the plane of polarization is not rotated by the beam, the light passes through the Faraday polarization rotation element 3 as it is and enters the polarization element 2. In this case, the horizontally polarized wave incident on the polarization separation film 21 of the polarizing element 2 is transmitted,
The vertically polarized wave is emitted in the direction of Y1, and the vertically polarized wave is reflected by the reflective surface 22 of the polarizing element 2 and passes through the polarized light separating film 21.
However, it is reflected again and emitted in the direction of Y1.
上記において、偏光素子１により分離された光
がフアラデー回転素子３によつてその偏光面を90
度回転される時には、フアラデー回転素子３に入
射した水平偏波は垂直偏波になり、これは偏光素
子２の偏光分離膜２１により反射されＹ２の方向
に出射し、同様にしてフアラデー回転素子３に入
射した垂直偏波は水平偏波になり、これは偏光素
子２の反射面２２で反射された後偏光分離膜２１
を透過してＹ２の方向に出射する。 In the above, the light separated by the polarizing element 1 is changed by the Faraday rotator 3 to change its plane of polarization by 90 degrees.
When rotated, the horizontally polarized wave incident on the Faraday rotator 3 becomes a vertically polarized wave, which is reflected by the polarization separation film 21 of the polarizing element 2 and emitted in the Y2 direction, and similarly, the Faraday rotator 3 The vertically polarized wave that has entered becomes horizontally polarized wave, which is reflected by the reflective surface 22 of the polarizing element 2 and then passes through the polarization separation film 21.
It passes through and is emitted in the direction of Y2.
このように、偏光素子１により入射光を分離
し、フアラデー回転素子３によりこれら分離され
た光の偏光面を回転制御することによつて偏光素
子２からの光の出射方向を切り換えることができ
る。 In this way, the direction of light output from the polarizing element 2 can be switched by separating the incident light using the polarizing element 1 and controlling the rotation of the polarization plane of the separated lights using the Faraday rotation element 3.
また、偏光素子１にＸ２の方向から入射する光
についても同様のことが可能であり、これによつ
て出射方向の異なる２つの光を選択的に取り出す
こともできる。 Further, the same thing can be done for the light that enters the polarizing element 1 from the direction of X2, and thereby it is also possible to selectively extract two lights having different emission directions.
(c) 従来技術と問題点
従来、上記偏光素子１により分離された水平偏
波と垂直偏波の光路間の距離ｄ（第１図参照）は
10mm前後であつた。(c) Prior art and problems Conventionally, the distance d between the optical paths of the horizontally polarized wave and the vertically polarized wave separated by the polarizing element 1 (see Figure 1) is
It was around 10mm.
これは偏光素子１の幾何学的寸法、すなわち偏
光分離膜１１の面と反射面１２との間の距離に基
づくものであつて、従来の偏光素子の構造および
その製造方法では偏光素子を小型にするためこの
距離を１mm以下にすることはきわめて困難であ
り、またこれを実現するためには、製造コストが
高くなる欠点があつた。 This is based on the geometric dimensions of the polarizing element 1, that is, the distance between the surface of the polarization separation film 11 and the reflecting surface 12. Therefore, it is extremely difficult to reduce this distance to 1 mm or less, and achieving this has the drawback of increasing manufacturing costs.
すなわち、従来の構造の偏光素子は、第２図に
示すＡの部分とＢの部分とから成り、これらは別
箇に製作され、Ａの部分に偏光分離膜１１を設け
た後Ｂの部分と貼り合わせることによつて製作さ
れていた。しかも、これらにおいて、面４と面５
は正確に平行が保たれ、また面６と面７は正確に
同一平面上に在るように組立られ、かつ面６，
７，８および９には精密平面研磨加工が施されて
いることが必要であり、このような構造によれ
ば、偏光素子が小型になる程取り扱いおよび精度
の維持が困難になるためである。 That is, a polarizing element with a conventional structure consists of a part A and a part B shown in FIG. It was made by gluing it together. Moreover, in these, surface 4 and surface 5
are assembled so that they are exactly parallel, surfaces 6 and 7 are exactly on the same plane, and surfaces 6,
7, 8, and 9 must be subjected to precision surface polishing, and with such a structure, the smaller the polarizing element becomes, the more difficult it becomes to handle and maintain precision.
(d) 発明の目的
本発明は、従来の偏光素子の構造とは異なつ
て、小型化、低コスト化が可能な新規な構造を有
する偏光素子を提供することを目的とする。(d) Object of the Invention An object of the present invention is to provide a polarizing element having a novel structure that is different from the structure of conventional polarizing elements and can be made smaller and lower in cost.
(e) 発明の構成
本発明は、２面が平行平面の透明平板３１の一
方の面の一部に偏光分離膜３２を、他方の面の一
部に光反射膜３３を互いに斜め方向に位置ずれさ
せて設けた偏光素子であつて、前記偏光分離膜３
２と前記光反射膜３３は、水平偏波と垂直偏波を
含む入射光Ｘ３が前記透明平板３１の前記他方の
面における前記反射膜３３が設けられていない部
分に対し斜め方向より入射し、前記透明平板３１
を通つて前記偏光分離膜３２に斜め方向より入射
した場合には、前記水平偏波は前記偏光分離膜３
２を透過し前記透明平板３１より出射して第１出
射光Ｘ３となり、前記垂直偏波は前記偏光分離膜
３２で反射し、前記透明平板３１を通つて前記光
反射膜３３で反射し、前記透明平板３１を通つて
前記一方の面における前記偏光分離膜３２が設け
られていない部分より出射して前記第１出射光Ｙ
３と近接し且つ平行な第２出射光Ｙ４となり、水
平偏波と垂直偏波を含む入射光Ｘ４が前記透明平
板３１の前記一方の面における前記偏光分離膜３
２に斜め方向より入射した場合には、前記水平偏
波は前記偏光分離膜３２を透過し前記透明平板３
１を通つて前記光反射膜３３で反射し、前記透明
平板３１を通つて前記一方の面における前記偏光
分離膜３２が設けられていない部分より出射して
第２出射光Ｙ４となり、前記垂直偏波は前記偏光
分離膜３２で反射され前記透明平板３１外へ出射
して前記第２出射光Ｙ４と近接し且つ平行な第１
出射光Ｙ３となるように、設けられていることを
特徴とする。(e) Structure of the Invention The present invention provides a transparent flat plate 31 having two parallel planes, with a polarization separation film 32 on a part of one face and a light reflection film 33 on a part of the other face, which are positioned obliquely to each other. The polarization separation film 3 is a polarization element provided in a shifted manner.
2 and the light reflective film 33, the incident light X3 including horizontally polarized waves and vertically polarized waves is incident from an oblique direction onto a portion of the other surface of the transparent flat plate 31 where the reflective film 33 is not provided, The transparent flat plate 31
If the horizontally polarized light enters the polarization separation film 32 from an oblique direction through the polarization separation film 3
The vertically polarized wave is reflected by the polarization separation film 32, passes through the transparent flat plate 31, is reflected by the light reflection film 33, and is emitted from the transparent flat plate 31 to become the first output light X3. The first emitted light Y passes through the transparent flat plate 31 and is emitted from a portion of the one surface where the polarized light separation film 32 is not provided.
The incident light X4, which includes horizontally polarized waves and vertically polarized waves, becomes a second emitted light Y4 that is close to and parallel to the polarized light separation film 3 on the one surface of the transparent flat plate 31.
2 from an oblique direction, the horizontally polarized light passes through the polarization separation film 32 and passes through the transparent flat plate 3.
1, is reflected by the light reflecting film 33, passes through the transparent flat plate 31, and is emitted from a portion of the one surface where the polarized light separating film 32 is not provided, becoming a second emitted light Y4, which is the vertically polarized light Y4. The wave is reflected by the polarized light separation film 32 and emitted to the outside of the transparent flat plate 31, and is emitted into a first wave that is close to and parallel to the second emitted light Y4.
It is characterized in that it is provided so that the emitted light Y3 is generated.
(f) 発明の実施例
以下本発明の実施例を図面を参照して説明す
る。(f) Embodiments of the invention Examples of the invention will be described below with reference to the drawings.
第３図は本発明による偏光素子の一実施例を示
す模式図である。 FIG. 3 is a schematic diagram showing an embodiment of a polarizing element according to the present invention.
同図において、３１は厚さが１mm程度であり、
平行平面を有する透明平板であるガラス板であ
る。このガラス板３１の一方の面の一部に誘電体
多層膜から成る偏光分離膜３２を形成し、他の面
の一部に反射膜３３（金属薄膜または誘電体多層
膜から成る）を形成する。これらの膜の形成は通
常の真空蒸着あるいはスパツタリングとフオトエ
ツチングの技術を用いて行えばよい。 In the same figure, 31 has a thickness of about 1 mm,
This is a glass plate that is a transparent flat plate with parallel planes. A polarization separation film 32 made of a dielectric multilayer film is formed on a part of one surface of the glass plate 31, and a reflective film 33 (made of a metal thin film or a dielectric multilayer film) is formed on a part of the other surface. . These films may be formed using conventional vacuum deposition or sputtering and photoetching techniques.
上記のようにして得られた偏光素子にＸ３の方
向から入射した光は、従来の偏光素子におけると
同様に分離され、同図の実線の経路にしたがつて
水平偏波はＹ３に、垂直偏波はＹ４に出射する。 The light incident on the polarizing element obtained as described above from the direction The wave is emitted at Y4.
また、Ｘ４の方向から入射した光は、破線の径
路にしたがつて分離され、水平偏波はＹ４に、垂
直偏波はＹ３に出射する。 Further, the light incident from the direction of X4 is separated along the path indicated by the broken line, and the horizontally polarized wave is outputted to Y4, and the vertically polarized wave is outputted to Y3.
尚、水平偏波と垂直偏波の出射光は一方が第１
出射光、他方が第２出射光となり、これらは互い
に近接し且つ平行な出射光となる。 Note that one of the horizontally polarized and vertically polarized output lights is the first.
The emitted light and the other become the second emitted light, and these become emitted lights that are close to each other and parallel to each other.
これらの場合、出射光Ｙ３とＹ４の間の距離ｄ
１は、偏光素子に対するＸ３方向の光の入射角を
ｉ、ガラス板３１の厚さをｔまたその屈折率をｎ
とすると
ｄ１＝2t・cosi・sini／（n2−sin2ｉ）1/2
であるから、ｔ＝１mm、ｉ＝45°、ｎ＝1.5とする
と ｄ１≒1.26mmとなる。 In these cases, the distance d between the output beams Y3 and Y4
1 is the angle of incidence of light in the X3 direction on the polarizing element, t is the thickness of the glass plate 31, and n is the refractive index of the glass plate 31.
Then, d1=2t・cosi・sini/(n 2 − sin 2 i) 1/2 , so if t=1 mm, i=45°, and n=1.5, then d1≒1.26 mm.
本発明によれば、ガラス板３１の両面の平行度
が保たれていればその厚さはさらに薄いものでも
実施可能であり、この厚さに比例してｄ１の値を
さらに小さくすることができる。 According to the present invention, as long as the parallelism of both sides of the glass plate 31 is maintained, the thickness of the glass plate 31 can be even thinner, and the value of d1 can be further reduced in proportion to this thickness. .
第４図は本発明の実施例を示す模式図である。 FIG. 4 is a schematic diagram showing an embodiment of the present invention.
同図に示す偏光素子は、第３図と同様にして偏
光分離膜３２と反射膜３３を設けられたガラス板
３１を、該ガラス板３１と同じ屈折率を有する直
角プリズム４１および４２で両側から挾むように
して貼り合せ一体化してものであり、同図Ａは貼
り合せ前の斜視図、Ｂは貼り合せ後の断面図であ
る。 In the polarizing element shown in the same figure, a glass plate 31 provided with a polarization separation film 32 and a reflective film 33 in the same manner as in FIG. They are integrally bonded together in a manner such that they are sandwiched together, and FIG.
本構造の偏光素子の場合には、第４図Ｂから明
らかなように、Ｘ５およびＸ６から入射する光は
偏光素子のそれぞれの面４３および４４に対しほ
ぼ垂直に入射するために、入射面４３あるいは４
４における反射損失が少なくなり、また、偏光分
離膜３２とガラス板３１との界面における光の入
射角および出射角が大きくなるために、２つの偏
波に対する分離性能を向上することができる。 In the case of the polarizing element of this structure, as is clear from FIG. Or 4
Since the reflection loss at 4 is reduced and the incident and exit angles of light at the interface between the polarization separation film 32 and the glass plate 31 are increased, the separation performance for two polarized waves can be improved.
(g) 発明の効果
本発明によれば、偏光素子により分離された出
射光の間の距離を小さくすることが容易であり、
これによつてフアラデー回転素子を小型化でき、
その動作効率（一定の印加電圧によつて可能な偏
光面の回転角の大さ）を向上でき、また高速動作
を可能にする効果がある。さらにまた、構造およ
びその加工が比較的簡単であるため、低コストで
量産可能な偏光素子を提供できる効果がある。(g) Effects of the invention According to the invention, it is easy to reduce the distance between the emitted lights separated by the polarizing element,
This allows the Faraday rotation element to be miniaturized,
It has the effect of improving its operating efficiency (the degree of rotation angle of the plane of polarization that is possible with a constant applied voltage) and enabling high-speed operation. Furthermore, since the structure and processing thereof are relatively simple, it is possible to provide a polarizing element that can be mass-produced at low cost.
第１図は偏光素子を用いた光スイツチの概要を
説明するための図、第２図は従来の偏光素子の構
造を示す図、第３図および第４図は本発明による
偏光素子の構造を示す模式図である。
図において１および２は偏光素子、３はフアラ
デー回転素子、４，５，６，７，８および９は
面、１１，２１および３２は偏光分離膜、１２お
よび２２は反射面、３１はガラス板、３３は反射
膜、４１および４２は直角プリズム、４３および
４４は入射面、４５は出射面、Ｘ１…Ｘ６は光の
入射方向、Ｙ４…Ｙ６は光の出射方向、ｄおよび
ｄ１は偏波間の距離である。
Figure 1 is a diagram for explaining the outline of an optical switch using a polarizing element, Figure 2 is a diagram showing the structure of a conventional polarizing element, and Figures 3 and 4 are diagrams showing the structure of a polarizing element according to the present invention. FIG. In the figure, 1 and 2 are polarizing elements, 3 is a Faraday rotation element, 4, 5, 6, 7, 8, and 9 are surfaces, 11, 21, and 32 are polarization separation films, 12 and 22 are reflective surfaces, and 31 is a glass plate. , 33 is a reflective film, 41 and 42 are right-angle prisms, 43 and 44 are incident surfaces, 45 is an exit surface, X1...X6 are light incident directions, Y4...Y6 are light exit directions, d and d1 are polarization differences It is distance.
Claims (1)
に偏光分離膜を、他方の面の一部に光反射膜を互
いに斜め方向に位置ずれさせて設けた偏光素子で
あつて、 前記偏光分離膜と前記光反射膜は、 水平偏波と垂直偏波を含む入射光が前記透明平
板の前記他方の面における前記反射膜が設けられ
ていない部分に対し斜め方向より入射し、前記透
明平板を通つて前記偏光分離膜に斜め方向より入
射した場合には、前記水平偏波は前記偏光分離膜
を透過し前記透明平板より出射して第１出射光と
なり、前記垂直偏波は前記偏光分離膜で反射し、
前記透明平板を通つて前記光反射膜で反射し、前
記透明平板を通つて前記一方の面における前記偏
光分離膜が設けられていない部分より出射して前
記第１出射光と近接し且つ平行な第２出射光とな
り、 水平偏波と垂直偏波を含む入射光が前記透明平
板の前記一方の面における前記偏光分離膜に斜め
方向より入射した場合には、前記水平偏波は前記
偏光分離膜を透過し前記透明平板を通つて前記光
反射膜で反射し、前記透明平板を通つて前記一方
の面における前記偏光分離膜が設けられていない
部分より出射して第２出射光となり、前記垂直偏
波は前記偏光分離膜で反射され前記透明平板外へ
出射して前記第２出射光と近接し且つ平行な第１
出射光となるように、 設けられていることを特徴とした偏光素子。[Claims] 1. Polarized light obtained by providing a polarized light separating film on a part of one surface of a transparent flat plate with two parallel planes and a light reflecting film on a part of the other surface with their positions shifted in an oblique direction from each other. In the element, the polarization separation film and the light reflection film are arranged so that incident light including horizontally polarized waves and vertically polarized waves is directed in an oblique direction with respect to a portion of the other surface of the transparent flat plate where the reflection film is not provided. If the horizontally polarized light is incident on the polarized light separating film from an oblique direction through the transparent flat plate, the horizontally polarized light passes through the polarized light separating film and exits from the transparent flat plate to become the first output light, The vertically polarized wave is reflected by the polarization separation film,
The light passes through the transparent flat plate, is reflected by the light reflecting film, passes through the transparent flat plate, and is emitted from a portion of the one surface where the polarized light separating film is not provided, and is close to and parallel to the first emitted light. When the incident light, which becomes second output light and includes horizontally polarized waves and vertically polarized waves, enters the polarized light separating film on the one surface of the transparent flat plate from an oblique direction, the horizontally polarized light is removed from the polarized light separating film. The light passes through the transparent flat plate, is reflected by the light reflecting film, passes through the transparent flat plate, and is emitted from a portion of the one surface where the polarization separation film is not provided, becoming a second outgoing light, and the vertical light The polarized light is reflected by the polarized light separating film and emitted to the outside of the transparent flat plate, and the polarized light is emitted from the first light beam, which is close to and parallel to the second light beam.
A polarizing element characterized by being provided so as to emit light.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12264182A JPS5913224A (en) | 1982-07-14 | 1982-07-14 | Polarizing element |
| DE8383304027T DE3378140D1 (en) | 1982-07-14 | 1983-07-11 | Polarizing elements |
| EP83304027A EP0100178B1 (en) | 1982-07-14 | 1983-07-11 | Polarizing elements |
| US06/815,279 US4641926A (en) | 1982-07-14 | 1985-12-26 | Polarizing element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12264182A JPS5913224A (en) | 1982-07-14 | 1982-07-14 | Polarizing element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5913224A JPS5913224A (en) | 1984-01-24 |
| JPH0372961B2 true JPH0372961B2 (en) | 1991-11-20 |
Family
ID=14840992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12264182A Granted JPS5913224A (en) | 1982-07-14 | 1982-07-14 | Polarizing element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5913224A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6138934A (en) * | 1984-07-30 | 1986-02-25 | Yamaichi Electric Mfg Co Ltd | Switch of optical path |
| EP1031868B1 (en) * | 1999-02-26 | 2003-05-14 | Dr. Johannes Heidenhain GmbH | Compensated parallel beam splitter with two plates and interferometer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56137329A (en) * | 1980-03-28 | 1981-10-27 | Fujitsu Ltd | Polarized and separated light control device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5699538U (en) * | 1979-12-27 | 1981-08-06 |
-
1982
- 1982-07-14 JP JP12264182A patent/JPS5913224A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56137329A (en) * | 1980-03-28 | 1981-10-27 | Fujitsu Ltd | Polarized and separated light control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5913224A (en) | 1984-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0100178B1 (en) | Polarizing elements | |
| JPH0230490B2 (en) | ||
| JPH0372961B2 (en) | ||
| JP2825037B2 (en) | Optical connection device and optical system for optical connection device | |
| JPH0139561B2 (en) | ||
| JPH0357459B2 (en) | ||
| US4553229A (en) | Apparatus for reading information | |
| JP2000180789A (en) | Optical isolator | |
| JPH06324289A (en) | Polarization beam splitter and optical circulator using this splitter and optical switch | |
| JPH0830789B2 (en) | Polarization splitting prism | |
| JP2775103B2 (en) | Polarizing prism | |
| JPS60238813A (en) | Optical isolator | |
| JPS5996551A (en) | Reproducing device of photomagnetic recording body | |
| JPS6030734Y2 (en) | High reverse loss compact optical isolator | |
| JPH0738049B2 (en) | Optical device | |
| JP2003185836A (en) | Polarizing beam splitter and optical isolator optical system | |
| JPH06281886A (en) | Optical isolator and optical device using optical isolator | |
| JPS62200319A (en) | Optical fiber circuit device | |
| JPS63280217A (en) | Optical circuit | |
| JP3263501B2 (en) | Polarization separation element | |
| JP2002287093A (en) | Optical isolator | |
| JPH08166561A (en) | Optical element for optical isolator and optical isolator | |
| JPH09325215A (en) | Polarization beam splitter and module therefor | |
| JPH1138400A (en) | Liquid crystal element | |
| JPS63183402A (en) | Polarized light separating and synthesizing prism for optical device |