JPS58123501A - Optical switch - Google Patents
Optical switchInfo
- Publication number
- JPS58123501A JPS58123501A JP581882A JP581882A JPS58123501A JP S58123501 A JPS58123501 A JP S58123501A JP 581882 A JP581882 A JP 581882A JP 581882 A JP581882 A JP 581882A JP S58123501 A JPS58123501 A JP S58123501A
- Authority
- JP
- Japan
- Prior art keywords
- light
- fiber
- fibers
- signals
- windows
- 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
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/351—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements
- G02B6/353—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being a shutter, baffle, beam dump or opaque element
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
- G02B6/3544—2D constellations, i.e. with switching elements and switched beams located in a plane
- G02B6/3548—1xN switch, i.e. one input and a selectable single output of N possible outputs
- G02B6/3552—1x1 switch, e.g. on/off switch
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
- G02B6/3554—3D constellations, i.e. with switching elements and switched beams located in a volume
- G02B6/3556—NxM switch, i.e. regular arrays of switches elements of matrix type constellation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
Description
【発明の詳細な説明】 チに関する。[Detailed description of the invention] Regarding chi.
一般に接点を断続させる機械的スイッチは接点の品質を
維持するため、高精度のプレス作業を必要としたり、あ
るいは接点に銀メッキなどを施す必要があるうえ、耐摩
耗性、接触安定性などで問題がある。Mechanical switches that make and break contacts generally require high-precision press work or silver plating to maintain the quality of the contacts, and they also have problems with wear resistance, contact stability, etc. There is.
そこで、接点を必要としないスイッチとして光スィッチ
が開発されている。この光スィッチは光信号をＯＮ，Ｏ
ＦＦ処理するものであり、接点式のスイッチに比べ耐寿
命性、品質特性の点で優れているものである。Therefore, optical switches have been developed as switches that do not require contacts. This optical switch turns the optical signal ON and OFF.
It undergoes FF processing and is superior to contact type switches in terms of lifespan and quality characteristics.
第１図〜第３図は従来の光スィッチの基本的構造を示し
ているものである。第１図の光スイ”ソチはファイバ１
ｐ端面に２本のファイバ２と３を対向サセ、この一方の
ファイバ１のポジションｅａとｂとに移動して光の伝送
経路を２段に切換えるようにしだものである。第２図の
光スィッチは送光側ファイバ４の両側に受光側ファイバ
５と６を配置して各ファイバ４， ５． ６の端部
にレンズ４ａ、５ａ、６ａ’に設けている。そして、プ
リズム７をレンズ４ａと５ａの間またはレンズ４ａと６
ａの間に移動できるようにして、ファイバ４から送られ
る光の経路をファイバ５と６とに２段切換えできるよう
にしだものである。また、第３図の光スィッチは１本の
ファイバ８と２本のファイバ９，１０．！：の間にセル
フオツフレンズ１１を介在させ、このセルフオツフレン
ズ１１のポジションをａとｂとに移動することにより、
光の伝送経路を２段に切換えるようにしたものである。1 to 3 show the basic structure of a conventional optical switch. The optical switch in Figure 1 “Sochi is fiber 1”
Two fibers 2 and 3 are arranged opposite each other on the p end face, and one of the fibers 1 is moved to positions ea and b to switch the optical transmission path into two stages. The optical switch shown in FIG. 2 has light-receiving fibers 5 and 6 arranged on both sides of a light-transmitting fiber 4, so that each fiber 4, 5. The lenses 4a, 5a, and 6a' are provided at the ends of the lens 6. Then, the prism 7 is placed between the lenses 4a and 5a or between the lenses 4a and 6.
a, so that the path of light sent from fiber 4 can be switched between fibers 5 and 6 in two stages. The optical switch shown in FIG. 3 has one fiber 8 and two fibers 9, 10 . ! By interposing the self-off lens 11 between : and moving the position of this self-off lens 11 between a and b,
The optical transmission path is switched into two stages.
ところが、上記従来の光スィッチはいずれも光の伝送経
路を切換えるだけであり、１本のファイバより成る伝送
経路で信号をＯＮ、ＯＦＦして２進コードを発生させる
ことはできなかった。However, all of the above-mentioned conventional optical switches only switch optical transmission paths, and cannot generate binary codes by turning signals on and off through a transmission path consisting of a single fiber.
本発明は光スィッチによって新だな機能を発揮させるも
のであり、無接点の１本の伝送経路にてＯＮ、ＯＦＦ信
号を発生すること、：のできる光スィッチを提供するこ
とを目的とするものである。The present invention allows an optical switch to exhibit a new function, and an object of the present invention is to provide an optical switch that can generate ON and OFF signals through a single non-contact transmission path. It is.
本発明は送光側と受光側の一対のファイバを同芯上に対
向させ、この対向端面における光の授受を断続させるこ
とにより、受光側ファイバから光のＯＮ、ＯＦＦ信号を
取り出せるようにしたことを特徴とするものである。In the present invention, a pair of fibers on the light transmitting side and the light receiving side are coaxially opposed to each other, and by intermittent transmission and reception of light at the opposing end faces, it is possible to extract light ON and OFF signals from the light receiving side fiber. It is characterized by:
以下、本発明の実施例を第４図以下の図面によって説明
する。Hereinafter, embodiments of the present invention will be described with reference to the drawings from FIG. 4 onwards.
第４図は本発明による光スィッチを斜視図によって示し
だものである。FIG. 4 shows a perspective view of an optical switch according to the invention.
図中の符号２１，２２，２３，２４．２５は送光側のプ
ラスチックファイバ（光ファイバ）であり、符号３１，
３２，３３，３４．３５は受光側のプラスチックファイ
バ（光ファイバ）である。このファイバ２１と３１．２
２と３２．２３と３３゜２４と３４．２５と３５は互い
に同芯上に配置されているものである。また、各ファイ
バの端面２１ａと３１ａ、２２ａと３２ａ、２３ａと３
３ａ。Reference numbers 21, 22, 23, 24, and 25 in the figure are plastic fibers (optical fibers) on the light transmission side;
32, 33, 34, and 35 are plastic fibers (optical fibers) on the light receiving side. This fiber 21 and 31.2
2, 32, 23, 33, 24, 34, 25, and 35 are arranged concentrically with each other. Also, the end faces 21a and 31a, 22a and 32a, 23a and 3 of each fiber are
3a.
２４ａと３４ａ、２５ａと３５ａ（図では２１ａ。24a and 34a, 25a and 35a (21a in the figure).
３１ ａ’、 ２５ ａ’、 ３５ ａのみを示し
他は省略している）どうしは互いに間隙を有して対向し
ている。31 a', 25 a', 35 a are shown and the others are omitted) are opposed to each other with a gap between them.
また、送光側のファイバ２１〜２５の他端面２１ｂ〜２
５ｂには発光ダイオード、レーザ装置などの発光源２６
が各々対向しており、受光側のファイバ３１〜３５の他
端面３１ｂ〜３５ｂにはフォトトランジスタなどの受光
素子３６が各々対向している。そして、送光側のファイ
バ２１〜２５と受光側のファイバ３１〜３５の対向間隙
部には遮光板４１．４２．４３．４４．４５が介在して
いる。In addition, the other end surfaces 21b to 2 of the fibers 21 to 25 on the light transmission side
5b is a light emitting source 26 such as a light emitting diode or a laser device.
are facing each other, and light receiving elements 36 such as phototransistors are facing the other end surfaces 31b to 35b of the fibers 31 to 35 on the light receiving side, respectively. A light shielding plate 41, 42, 43, 44, 45 is interposed between the fibers 21 to 25 on the light transmitting side and the fibers 31 to 35 on the light receiving side.
この各遮光板４１〜４５はファイバに対して直交する方
向へ摺動動作できるようになっているものである。まだ
、各遮光板４１〜４５の摺動動作は、各々一体に設けら
れているツマ ４１ａ〜４５ａを操作することによって
、各遮光板ごとに独立して行えるようになっているもの
である。前記各遮光板４１〜４５には単数あるいは複数
の窓４６が開口している。各遮光板４１〜４５には異な
る・（ターンにて窓４６が開口しているが、容態４６は
いずれも送光側ファイバ２１〜２５と受光側ファイバ３
１〜３５の芯線Ｘの延長上に位置できるようになってい
る。Each of the light shielding plates 41 to 45 is capable of sliding movement in a direction perpendicular to the fiber. However, the sliding movement of each of the light shielding plates 41 to 45 can be performed independently for each light shielding plate by operating knobs 41a to 45a that are provided integrally with each other. One or more windows 46 are opened in each of the light shielding plates 41 to 45. Each of the light shielding plates 41 to 45 has a different window 46 that is open at the turn, but the condition 46 is that the light transmitting side fibers 21 to 25 and the light receiving side fiber 3
It can be positioned on an extension of the core lines X from 1 to 35.
次に、上記構成による光スィッチの動作について説明す
る。Next, the operation of the optical switch with the above configuration will be explained.
発光素子２６から発せられる光は送光側ファイバ２１〜
２５内を伝わる。そして、例えば、ファイバ２１の端面
２１ａとファイバ３１の端面３１ａとの対向間隙部分に
各遮光板４１〜４５の窓４６が全て集中していれば、こ
の窓４６を通してファイバ２１とファイバ３１との間に
て光の授受が行われ、ファイバ３１の端面３１ｂに対向
している受光素子３６によって光が検知され、受光素子
３６に接続されている回路によって電気信号に変換され
る。逆に、ファイバ２１の端面２１ａとファイバ３１の
端面３１ａとの対向間隙部分に遮光板４１〜４５の窓４
６でない部分が１枚でも介在していれば、ファイバ２１
とファイバ３１の間の光の授受は断たれ、受光素子３６
は光を検知しない。すなわち、ファイバ２１とファイバ
３１の対向間隙部分に窓４６が集中しているか否かによ
って、１個の受光素子３６からＯＮ、ＯＦＦ信号を２進
コードとして取出すことができる。図示の実施例では複
数のファイバ２１〜２５と３１〜３５を並列に配置し、
各ファイバごとに受光素子３６を設けているので、各フ
ァイバの対向間隙部における窓４６の存在の有無により
、複数（図では５組）の２進コ一ド信号をパラレルに取
出すことができるものである。また、各受光素子３６か
ら得られるＯＮ、 ＯＦＦ信号の組合わせはツマミ４１
ａ〜４５ａ′ｆ：操作することによって行われる。この
ツマミ４１ａ〜４５ａを操作することにより、各遮光板
４１〜４５を移動させ、ファイバ２１〜２５と３１〜３
５との対向間隙部に位置する窓４６の組合せを数種類選
択して設定できるものである。The light emitted from the light emitting element 26 is transmitted through the light transmitting fiber 21~
25 is transmitted. For example, if the windows 46 of each of the light shielding plates 41 to 45 are all concentrated in the opposing gap between the end face 21a of the fiber 21 and the end face 31a of the fiber 31, the window 46 can be passed between the fiber 21 and the fiber 31. The light is exchanged at the fiber 31, the light is detected by the light receiving element 36 facing the end face 31b of the fiber 31, and is converted into an electrical signal by a circuit connected to the light receiving element 36. Conversely, the windows 4 of the light shielding plates 41 to 45 are formed in the opposing gap between the end surface 21a of the fiber 21 and the end surface 31a of the fiber 31.
If even one part other than 6 is present, the fiber 21
The transmission and reception of light between the fiber 31 and the light receiving element 36 is cut off.
does not detect light. That is, depending on whether the windows 46 are concentrated in the opposing gap between the fibers 21 and 31, ON and OFF signals can be extracted from one light receiving element 36 as a binary code. In the illustrated embodiment, a plurality of fibers 21 to 25 and 31 to 35 are arranged in parallel,
Since a light receiving element 36 is provided for each fiber, it is possible to extract a plurality of (5 sets in the figure) binary code signals in parallel depending on the presence or absence of a window 46 in the opposing gap of each fiber. It is. Further, the combination of ON and OFF signals obtained from each light receiving element 36 is controlled by a knob 41.
a to 45a'f: Performed by operation. By operating the knobs 41a to 45a, each of the light shielding plates 41 to 45 is moved, and the fibers 21 to 25 and 31 to 3 are
It is possible to select and set several types of combinations of the windows 46 located in the gap facing the window 5.
この窓４６の組合わせを設定することにより、各受光素
子３６によって検知され電気変換されるＯＮ、 ＯＦＦ
信号の組合せを任意に選択できるものである。By setting the combination of these windows 46, the ON and OFF signals detected and electrically converted by each light receiving element 36 are set.
The combination of signals can be arbitrarily selected.
なお、図示の実施例では両ファイバ間に介在する遮光板
４１〜４５に窓４６を開口しているが、逆に、遮光板４
１〜４５を透明板によって形成し、この透明板上に印刷
あるいは塗装などにより不透明部を複数設け、この不透
明部が両ファイバの間に存在しているか否かによって受
光素子３６による光検知をＯＮ、ＯＦＦさせるようにし
てもよい。In the illustrated embodiment, the windows 46 are opened in the light shielding plates 41 to 45 interposed between both fibers, but on the contrary, the windows 46 are opened in the light shielding plates 41 to 45 interposed between both fibers.
1 to 45 are formed from a transparent plate, a plurality of opaque parts are provided on this transparent plate by printing or painting, and light detection by the light receiving element 36 is turned on depending on whether or not this opaque part exists between both fibers. , it may be turned off.
次に、第５図（平面図）、第６図（第５図の■矢視図）
は他の実施例を示すものである。Next, Figure 5 (plan view), Figure 6 (view from the ■ arrow in Figure 5)
shows another embodiment.
この例では、下側に４本の送光側（あるいは受光側）の
プラスチックファイバ（光ファイバ）５１゜５２．５３
．５４を平行に配置し、上側には各ファイバ５１〜５４
と同芯上に対向する受光側（あるいは送光側）のプラス
チックファイバ（光ファイバ）６１〜６４（６４のみ図
示する）を配設している。また、各ファイバ５１〜５４
ならびに６１〜６４を固定しているベース７１には４本
の押圧部材７２ａ〜７２ａが挿入されており、各押圧部
材７２ａ〜７２ｄはスプリング７３ａ〜７３ｄによって
ベース７１内へ退行する方向へ付勢すれてイル。一方、
ベース７１の後方にはロータリーカム８１が回転自在に
設けられており、このロータ１、−ヵ４８１゜０１１部
に”ｕ−＋動。、。ッーオ、２が備えられている。そし
て、ロータリーカム８１の表面には複数の突起８１ａが
設けられている。In this example, there are four plastic fibers (optical fibers) on the light transmitting side (or receiving side) at the bottom 51°52.53
．． 54 are arranged in parallel, and each fiber 51 to 54 is arranged on the upper side.
Plastic fibers (optical fibers) 61 to 64 (only 64 is shown) on the light receiving side (or on the light transmitting side) are arranged coaxially and opposite to each other. In addition, each fiber 51 to 54
Four pressing members 72a to 72a are inserted into the base 71 that fixes 61 to 64, and each pressing member 72a to 72d is urged in the direction of retraction into the base 71 by springs 73a to 73d. Teil. on the other hand,
A rotary cam 81 is rotatably provided at the rear of the base 71, and a rotor 1 is provided with a "u-+ movement...2" at the -481°011 portion of the rotor 1. A plurality of protrusions 81a are provided on the surface of 81.
まだ、第４図に示したものと同様に、送光側のファイバ
５１〜５４の下端面には各々発光素子が対設されており
、受光側のファイバ６１〜６４の上端面には受光素子が
対設されている。Similarly to the one shown in FIG. 4, light emitting elements are provided on the lower end surfaces of the fibers 51 to 54 on the light transmitting side, and light receiving elements are provided on the upper end surfaces of the fibers 61 to 64 on the light receiving side. are set up opposite each other.
次に上記実施例による光スィッチの動作について説明す
る。Next, the operation of the optical switch according to the above embodiment will be explained.
発光素子から発せられる光はファイバ５１〜５４の各々
を通り、これと同芯上に対設されているファイバ６１〜
６４へ授受され、各ファイバ６１〜６４の上端面に対向
している受光素子によって検知される。ところが、ツマ
ミ８２を操作してロータリーカム８１を回転させ、突起
８１ａを例えば押圧部材７２ｄの後端に当接させると、
突起８１ａに押された押圧部材７２ｄはベース１１から
突出する。そして、この抑圧部材７２ｄが下側のファイ
バ５４の上端部を押し曲げ、ファイバ５４は上側のファ
イバ６４の軸芯から外れる。その結果、ファイバ５４と
ファイバ６４との間の光の授受は断たれ、ファイバ６４
の上端面に対向している受光素子による光の検知が行わ
れなくなる。さらにロータリーカム８１が回転して突起
８１ａが押圧部材７２ａの後端から外れると、抑圧部材
７２ａはスプリング７３ｄのカにょってベース１１内へ
退行する。よって、ファイバ５４の上部の押し曲げ力は
除かれ、ファイバ５４は自らの弾性ニよって復元し、再
び上下のファイバ５４と６４は同芯上に対向し、ファイ
バ６４の上端の受光素子によって光が検知される。すな
わち、抑圧部材７２ｄによってファイバ５４の上部を押
し曲げているが否かによって、受光素子による光検知は
断続され、受光素子に接続されている回路によって電気
変換されるＯＮ、ＯＦＦの２進コ一ド信号を得ることが
できる。第４図の場合と同様この信号は４組のファイバ
５１〜５４．６１〜６４の各々からパラレルに散出され
る。そして、ロータリーカム８１の表面に複数の突起８
１ａをパターン化して設け、これを回転させることによ
り、各組のファイバから取出されるＯＮ、 ＯＦＦ’信
号の組合せを自由に設定することができるものである。The light emitted from the light emitting element passes through each of the fibers 51 to 54, and the fibers 61 to 61 which are coaxially opposed to the fibers 51 to 54.
64, and is detected by a light receiving element facing the upper end surface of each fiber 61-64. However, when the knob 82 is operated to rotate the rotary cam 81 and the protrusion 81a is brought into contact with the rear end of the pressing member 72d, for example,
The pressing member 72d pressed by the projection 81a projects from the base 11. Then, the suppressing member 72d presses and bends the upper end of the lower fiber 54, and the fiber 54 deviates from the axis of the upper fiber 64. As a result, the transmission and reception of light between the fiber 54 and the fiber 64 is cut off, and the fiber 64
Detection of light by the light receiving element facing the upper end surface is no longer performed. When the rotary cam 81 further rotates and the projection 81a comes off from the rear end of the pressing member 72a, the suppressing member 72a retreats into the base 11 by the force of the spring 73d. Therefore, the pushing and bending force on the upper part of the fiber 54 is removed, the fiber 54 returns to its original state due to its own elasticity, and the upper and lower fibers 54 and 64 again coaxially face each other, and the light receiving element at the upper end of the fiber 64 emits light. Detected. In other words, depending on whether or not the upper part of the fiber 54 is pressed and bent by the suppressing member 72d, light detection by the light receiving element is interrupted, and a binary signal of ON and OFF is electrically converted by a circuit connected to the light receiving element. You can get the code signal. As in the case of FIG. 4, this signal is emitted in parallel from each of the four sets of fibers 51-54 and 61-64. A plurality of protrusions 8 are provided on the surface of the rotary cam 81.
1a is provided in a pattern and by rotating it, the combination of ON and OFF' signals taken out from each set of fibers can be freely set.
なお、図示の実施例では下側のファイバの上端をピスト
ン状の押圧部材７２ａ〜７２ｄによって押して曲げるよ
うし、また、ファイバの復帰をファイバ自体の弾性によ
って行うようにしているが、他の例として、ファイバの
上部を押圧部材７２ａ〜７２ｄの先部によって保持し、
押圧部材７２ａ〜７２ｄを戻すスプリング７３ａ〜７３
ｄの力によってファイバの上部を復帰させるようにして
もよい。In the illustrated embodiment, the upper ends of the lower fibers are pressed and bent by piston-shaped pressing members 72a to 72d, and the fibers are returned to their original positions by the elasticity of the fibers themselves. , the upper part of the fiber is held by the tips of the pressing members 72a to 72d,
Springs 73a to 73 that return the pressing members 72a to 72d
The upper part of the fiber may be returned to its original position by a force of d.
以上のように本発明によれば、無接点構造によってＯＮ
、 ＯＦＦの２進コ一ド信号を発するスイッチを実現で
き、耐寿命性、信頼性の点で従来のメカ接点式スイッチ
よりも大幅に品質を向上させることができる。さらに、
無接点構造であるためノイズも発生せず、使用場所の制
約を受けず、汎用性も向上されるなどの効果がある。As described above, according to the present invention, the non-contact structure allows the ON
It is possible to realize a switch that emits a binary code signal of OFF, and the quality can be significantly improved in terms of lifespan and reliability compared to conventional mechanical contact type switches. moreover,
Since it has a non-contact structure, it does not generate noise, is not subject to restrictions on where it can be used, and has the advantage of improved versatility.
第１図、第２図、第３図は従来の光スィッチの構造説明
図、第４図は本発明に、よｌる光スィッチの斜視図、第
５図は本発明の他の実施例を示す平面図、第６図は第５
図の■矢視図である。1, 2, and 3 are structural explanatory diagrams of a conventional optical switch, FIG. 4 is a perspective view of an optical switch according to the present invention, and FIG. 5 is a diagram showing another embodiment of the present invention. The plan view shown in Figure 6 is
It is a view in the direction of the ■ arrow in the figure.
Claims (3)
面どうしを対向はせて配置し、また、一方のファイバの
他端面には入力光を導き、他方のファイバの他端面から
は出力光を出力をせ、さらに、両ファイバの端面対向部
に、両ファイバ間の光の授受を断続する機構を設けて成
る光スィッチ。(1) A pair of fibers are arranged concentrically with the end faces of both fibers facing each other, and the input light is guided to the other end face of one fiber, and the output light is guided from the other end face of the other fiber. An optical switch that outputs light and is further provided with a mechanism on the opposing end surfaces of both fibers to interrupt the transmission and reception of light between the two fibers.
ァイバの端面対向部に介装される遮光板であることを特
徴とする特許請求の範囲第（１）項記載の光スィッチ。(2) The optical switch according to claim (1), wherein the mechanism for intermittent transmission and reception of light between both fibers is a light-shielding plate interposed between opposing end surfaces of both fibers.
のファイバの対向側端部分押し曲げて他方のファイバの
軸芯から外れさせる抑圧部材であることを特徴とする特
許請求の範囲第（１）項記載の光スィッチ。(3) The mechanism for intermittent transmission and reception of light between both fibers is a suppressing member that presses and bends the opposing end portion of one fiber to deviate from the axis of the other fiber. The optical switch described in (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP581882A JPS58123501A (en) | 1982-01-18 | 1982-01-18 | Optical switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP581882A JPS58123501A (en) | 1982-01-18 | 1982-01-18 | Optical switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58123501A true JPS58123501A (en) | 1983-07-22 |
Family
ID=11621657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP581882A Pending JPS58123501A (en) | 1982-01-18 | 1982-01-18 | Optical switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58123501A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5993404A (en) * | 1982-11-20 | 1984-05-29 | Matsushita Electric Ind Co Ltd | Multichannel optical switch |
| US6347168B1 (en) | 1999-01-28 | 2002-02-12 | Nec Corporation | Optical switch and optical switch system |
-
1982
- 1982-01-18 JP JP581882A patent/JPS58123501A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5993404A (en) * | 1982-11-20 | 1984-05-29 | Matsushita Electric Ind Co Ltd | Multichannel optical switch |
| US6347168B1 (en) | 1999-01-28 | 2002-02-12 | Nec Corporation | Optical switch and optical switch system |
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