JPH02171044A - Structure of optical system for terminal equipment of optical transmission system - Google Patents

Abstract

PURPOSE:To attain the reception of a wide angle of optical signal, long range transmission, to improve the reliability and to make the size small through the use of a light receiving element with a small light receiving area by forming a recessed part to a bottom face of a convex lens for light reception and providing a 2nd curved face lens. CONSTITUTION:A light receiving element 1 is arranged in the middle of a amount plate 5, four light emitting elements 3 are arranged at an equal interval on a concentric circle around the element 1 and 8 light emitting elements 8 are arranged at an equal interval on the concentric circle of the outer circumference. Moreover, a convex lens 6 of an elliptic shape is used as a wide angular lens to the light receiving face of the element 1 and arranged to the front part of the light receiving face of the element 1. Then a 2nd curved face lens whose concaved part 21 is formed to a bottom face corresponding to the light receiving face of the element 1 and even if an incident angle theta of an optical signal (x) is large, the light is refracted toward the light receiving face at the border between the concaved part 21 and the convex lens 5. Thus, even if the element 1 with a small light receiving area is in use, a wide angle application is attained, the long range transmission of the light projection section is attained, the reliability is improved and the size is made small.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は光空間伝送を用いた光線式伝送システムの端末
器の光学系構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an optical system structure of a terminal device of a light beam transmission system using optical space transmission.

（従来の技術） 第１８図は光空間伝送による光線式伝送システムを示し
ており、このシステムでは地上側に設けた複数のワーク
ステーションＳｌ＋・・・群を有線ラインＬ１・・で接
続しており、ある有線ライン、例えばＬｌに接続したワ
ークステーションＳｌ＋より有線系の伝送信号が送信さ
れると、有線ラインＬ１を通じて他のワークステーショ
ンＳｌ□、Ｓ９．で伝送信号が受信されるとともに、当
該有線ラインＬ、に接続しである光空間伝送のための端
末器Ｔ１を通じて光伝送系の光信号に変換され、端末器
Ｔ１の投光部から天井部に設けである端末器Ｔ６１に向
けて送信される。天井側に設けである対応する端末器Ｔ
０１では光信号を受光部で受光して再び有線系の伝送信
号に変換して天井側の有線ラインＬ０を通じて天井側に
設けてる他の端末器Ｔ０２・・・へ送信し、これらの端
末器Ｔ。２・・・で再び光伝送系の光信号に変換して地
上側の対応する端末器Ｔ、・・・へ投光部より送信する
。そして対応する地上側の端末器Ｔ２・・・では受光部
で光信号を受光して再度有線系の信号に変換し、端末器
Ｔ２・・・を接続した有線ラインＬ２・・・を通じて有
線ラインＬ２・・・に接続しであるワークステーション
Ｓ２１・・・に信号を送信する。(Prior art) Fig. 18 shows an optical beam transmission system using optical space transmission. In this system, a plurality of workstations Sl+... set on the ground side are connected by wired line L1... , when a wired transmission signal is transmitted from a workstation Sl+ connected to a wired line, for example Ll, to other workstations Sl□, S9 . At the same time, the transmission signal is received by the wired line L, and is converted into an optical signal for the optical transmission system through the terminal device T1 for optical space transmission connected to the wired line L, and is transmitted from the light projection part of the terminal device T1 to the ceiling. It is transmitted to the terminal device T61. Corresponding terminal device T installed on the ceiling side
In 01, the optical signal is received by the light receiving unit, converted back into a wired transmission signal, and sent through the wired line L0 on the ceiling to other terminals T02 installed on the ceiling, and these terminals T . 2..., the signal is again converted into an optical signal for the optical transmission system and transmitted from the light projector to the corresponding terminal device T,... on the ground side. Then, in the corresponding terminal device T2... on the ground side, the optical signal is received by the light receiving section, converted into a wired signal again, and then passed through the wired line L2... connected to the terminal device T2... . . and transmits a signal to the workstation S21 .

このような伝送システムを採用することにより地上と天
井との間の有線ラインの配線を無くすことができ、施工
上の利点とともに美観上の問題を解決している。第１９
図は地上側の端末器Ｔが机り上に配設されている状態を
示している。By adopting such a transmission system, it is possible to eliminate the need for wired lines between the ground and the ceiling, which not only provides construction advantages but also solves aesthetic problems. 19th
The figure shows a state in which the terminal device T on the ground side is placed on a desk.

ところで各端末器Ｔ、・・・、ＴＯ＋・・・は第２０図
（ａ）（ｂ）に示すように従来では受光部と投光部を並
設し、受光部では受光素子１の前に凸レンズ２を配置し
、又投光部では４個の発光素子３の前に凸レンズ４を配
置していた。また入射角θの大きな光信号Ｘでも受光が
できるように第２２図（ａ）（ｂ）に示す用に受光部の
受光素子数を増やして受光面積を大きくしていた。第２
２図（ｅ）は受光部の回路を示している。By the way, as shown in FIGS. 20(a) and 20(b), each terminal T, ..., TO+, ... conventionally has a light receiving section and a light emitting section arranged side by side, and the light receiving section has a light receiving section in front of the light receiving element 1. A convex lens 2 was disposed, and a convex lens 4 was disposed in front of the four light emitting elements 3 in the light projecting section. In addition, in order to be able to receive even the optical signal X having a large incident angle θ, the number of light receiving elements in the light receiving section was increased to increase the light receiving area as shown in FIGS. 22(a) and 22(b). Second
Figure 2(e) shows the circuit of the light receiving section.

（発明が解決しようとする課題） 従って従来例では受光素子１が並列に接続されるため容
量が増加して応答時間が長くなり、出力信号Ｓの波形に
歪が生じ、又太陽光などの影響により直流バイアスが加
わり、出力信号Ｓが正確に出力されなくなるなどの問題
点があった。(Problem to be solved by the invention) Therefore, in the conventional example, since the light receiving elements 1 are connected in parallel, the capacitance increases, the response time becomes longer, the waveform of the output signal S is distorted, and the influence of sunlight etc. This causes problems such as a direct current bias being added and the output signal S not being accurately output.

又長距離伝送を行なうために発光素子３の数を増したと
き発光レンズ径が第２１図のように小さいと矢印で示す
ように発光方向が偏光されて効率が悪くなるので、各発
光素子３の発光方向を同一方向とするのに大きなレンズ
径のレンズが必要となり、端末器が大型化するという問
題があった。Furthermore, when increasing the number of light emitting elements 3 for long-distance transmission, if the diameter of the light emitting lens is small as shown in Fig. 21, the light emitting direction will be polarized as shown by the arrow, resulting in poor efficiency. In order to make the light emitting directions in the same direction, a lens with a large lens diameter is required, which poses a problem of increasing the size of the terminal device.

また従来の端末器の構造では受光光軸、発光光軸が端末
器に対して一定に固定されているが、仮に調整可能なも
のでも垂直方向または水平方向の一部のみに調整範囲が
限られているなめ、発光光軸、受光光軸を任意の方向に
自由に調整することができなかった。In addition, in the structure of conventional terminal devices, the receiving optical axis and the emitting optical axis are fixed to the terminal device, but even if they are adjustable, the adjustment range is limited to only a part of the vertical or horizontal direction. Because of this, it was not possible to freely adjust the light emitting and receiving optical axes in any direction.

本発明は上述の問題点に鑑みて為されたもので、小さな
受光面積で広角的に光信号を受光できる受光部を備えた
光空間伝送システムの端末器の光学系構造を提供するこ
とを目的とし、更には投光部の長距離伝送を可能とし、
また伝送信頼性の向上と、小型化が図れる光空間伝送シ
ステムの端末器の光学系構造を提供することを目的とし
、また更にレンズの実装が簡単に行え且つ伝送特性のば
らつきも少なくなる光空間伝送システムの端末器の光学
系構造を提供することを目的とする。The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an optical system structure of a terminal device of an optical space transmission system equipped with a light receiving section that can receive optical signals from a wide angle with a small light receiving area. Furthermore, it enables long-distance transmission of the light emitting part,
In addition, the purpose is to provide an optical system structure for a terminal device of an optical space transmission system that can improve transmission reliability and reduce the size of the optical space. The purpose of this invention is to provide an optical system structure for a terminal device of a transmission system.

（課題を解決する手段） 請求項１記載の発明は発明は光信号を相手側の端末器に
向けて投光部より送信し、相手側の端末器からの光信号
を受光する受光部を備え、光空間伝送により伝送信号を
伝送する光線式伝送システｌ＼の端末器において、中央
に受光部の受光素子を配置し、該受光素子の周部に投光
部の複数の発光素子を等間隔に配設し、受光素子の前方
に受光用の広角レンズを配置して成ることを特徴とする
ものである。(Means for Solving the Problems) The invention according to claim 1 includes a light receiving unit that transmits an optical signal from a light projecting unit toward a terminal on the other side and receives an optical signal from the terminal on the other side. In a terminal device of an optical transmission system l\ that transmits a transmission signal by optical space transmission, a light receiving element of a light receiving part is arranged in the center, and a plurality of light emitting elements of a light projecting part are arranged at equal intervals around the light receiving element. The device is characterized in that a wide-angle lens for receiving light is arranged in front of the light receiving element.

請求項２記載の発明は光信号を相手側の端末器に向けて
投光部より送信し、相手側の端末器からの光信号を受光
する受光部を備え、光空間伝送により伝送信号を伝送す
る光線式伝送システムの端末器において、中央に受光部
の受光素子を配置し、該受光素子の周部に投光部の複数
の発光素子を等間隔に配設し、受光素子の前方に受光用
の広角レンズを配置し且つ各発光素子の前方に集光レン
ズを配設して成ることを特徴とするものである。The invention according to claim 2 includes a light receiving section that transmits an optical signal from a light projector toward a terminal on the other side and receives an optical signal from the terminal on the other side, and transmits the transmission signal by optical space transmission. In a terminal device for an optical transmission system, a light-receiving element of a light-receiving part is arranged in the center, a plurality of light-emitting elements of a light-emitting part are arranged at equal intervals around the light-receiving element, and a light-receiving element is arranged in front of the light-receiving element. The device is characterized in that a wide-angle lens is disposed for the light emitting device, and a condensing lens is disposed in front of each light emitting element.

請求項３記載の発明は請求項１又は２記載の発明におい
て受光用の広角レンズを楕円レンズで構成したものであ
る。The invention according to claim 3 is the invention according to claim 1 or 2, in which the wide-angle lens for light reception is constituted by an elliptical lens.

請求項４記載の発明は請求項１又は２記載の発明におい
て受光用の広角レンズを裏面中心部に凹所を設けた第２
曲面レンズで構成したものである。The invention according to claim 4 is the invention according to claim 1 or 2, in which the wide-angle lens for light reception is provided with a second lens having a recess at the center of the back surface.
It is composed of curved lenses.

請求項５記載の発明は請求項１又は２記載の発明におい
て受光用の広角レンズ及び集光レンズを上下２枚の保持
枠で挟持固定したものである。The invention according to claim 5 is the invention according to claim 1 or 2, in which the wide-angle lens for light reception and the condensing lens are clamped and fixed between two upper and lower holding frames.

請求項６記載の発明は請求項２記載の発明において受光
用の広角レンズ及び集光レンズの夫々のレンズ形状を形
成した一枚のレンズ板を用いたものである。The invention according to claim 6 is the invention according to claim 2, in which a single lens plate is used in which the lens shapes of the wide-angle lens for light reception and the condensing lens are respectively formed.

請求項７記載の発明は請求項２又は６記載の発明におい
て、受光用の広角レンズ及び集光レンズの夫々のレンズ
形状を夫々フレネルレンズで形成した一枚のレンズ板を
用いたものである。The invention according to claim 7 is the invention according to claim 2 or 6, in which a single lens plate is used in which each of the wide-angle lens for light reception and the condensing lens is formed by a Fresnel lens.

（作用） しかして対応する端末器からの光信号は受光用の広角レ
ンズを介して受光部の受光素子に受光されるため、大き
な入射角θの光信号でも受光素子で受光できるのである
。(Function) Since the optical signal from the corresponding terminal device is received by the light receiving element of the light receiving section through the wide-angle lens for light reception, even an optical signal having a large incident angle θ can be received by the light receiving element.

また各発光素子の前方にレンズを配置することにより偏
光することなく光信号を伝送することもできる。Furthermore, by arranging a lens in front of each light emitting element, optical signals can be transmitted without being polarized.

更に受光用の広角レンズと集光レンズとを並設する場合
に、広角レンズと集光レンズとを共に挟持する保持枠を
用いたり、あるいは一枚のレンズ板でこれらレンズを一
体に形成することにより、実装作業が簡単になるもので
ある。Furthermore, when a wide-angle lens for light reception and a condensing lens are arranged side by side, it is possible to use a holding frame that holds both the wide-angle lens and the condensing lens, or to form these lenses integrally with a single lens plate. This simplifies the implementation work.

（実施例） 以下本発明を実施例により説明する。(Example) The present invention will be explained below with reference to Examples.

火ル■ユ 木実絶倒は第１図（ａ）（ｂ）に示すように取付板５の
中央に受光素子１を配置し、この受光素子１の周部に受
光素子１を中心とした同心円周上に４個の発光素子３を
等間隔で配置し、更にこの外周部に更に同心円周上に８
個の発光素子３を等間隔に配置しである。各発光素子３
は受光素子１の受光光軸に対して外斜め方向となるよう
に発光光軸を設定して放射状に発光送信ができるように
しである。As shown in Fig. 1 (a) and (b), the light receiving element 1 is placed in the center of the mounting plate 5, and the light receiving element 1 is placed around the periphery of the light receiving element 1. Four light emitting elements 3 are arranged at equal intervals on a concentric circumference, and further 8 light emitting elements 3 are arranged on a concentric circumference on the outer circumference.
The light emitting elements 3 are arranged at equal intervals. Each light emitting element 3
The light emitting optical axis is set so as to be diagonal outward with respect to the light receiving optical axis of the light receiving element 1, so that light emission can be transmitted radially.

受光素子１の受光面には１枚の楕円形状の凸レンズ６を
受光素子１の受光面の前部に配置したもので、第２図に
図示するように入射角θが大きな光信号Ｘでも受光素子
１に受光させることができるようにしである。A single elliptical convex lens 6 is placed in front of the light-receiving surface of the light-receiving element 1, and as shown in FIG. This allows the element 1 to receive light.

第３図、第４図は上記光学系の構造を採用した端末器に
内蔵するプリント基板からなる取付板５への実装状態を
示しており、凸レンズ６は円環状の取付枠７に嵌められ
て取付枠７の周壁を貫通させたねじ孔８に螺入させる固
定ねじ９にて取付枠７に締め付は固定されるもので取付
枠７は取付片７ａに設けたねじ孔１０を押通させた固定
ねじ１２で取付板５に固定される。FIGS. 3 and 4 show how the convex lens 6 is mounted on a mounting plate 5 made of a printed circuit board built into a terminal device employing the structure of the optical system described above. The mounting frame 7 is fastened to the mounting frame 7 with a fixing screw 9 that is screwed into a screw hole 8 that penetrates the peripheral wall of the mounting frame 7. It is fixed to the mounting plate 5 with a fixed screw 12.

取付部位には取付板５の下方から挿入口１１を通じて貫
設した受光信号を増幅するプリアンプなどを内蔵したア
ンプ部１３の上面に配設される受光素子の受光面が位置
するようになっている。The light-receiving surface of a light-receiving element disposed on the upper surface of an amplifier section 13 containing a built-in preamplifier and the like for amplifying the light-receiving signal penetrated from below the mounting plate 5 through the insertion port 11 is located at the mounting site. .

第５図は取付板５を実装した状態の天井取付用端末器の
断面を示しており、この端末器は第６図（ａ）、（ｂ）
に示す短円筒状のボディ１４内に第７図（ａ）、（ｂ）
に示す筒状の中ボディ１５を納装し、この中ボディ１５
の底部に形成された段部１６上に有線伝送系との間で信
号の授受を行うためのインターフェース回路を配線した
プリント基板１７を配設し、且つスペーサ１８を介して
プリント基板からなる取付板５を固定している。FIG. 5 shows a cross section of the ceiling-mounted terminal device with the mounting plate 5 mounted, and this terminal device is shown in FIGS. 6(a) and (b).
Inside the short cylindrical body 14 shown in FIGS. 7(a) and (b)
The cylindrical inner body 15 shown in FIG.
A printed circuit board 17 on which an interface circuit for exchanging signals with a wired transmission system is wired is disposed on a stepped portion 16 formed at the bottom of the mounting plate. 5 is fixed.

この時、アンプ部１３の後部はプリント基板１７中央部
を貫いて中ボディ１５の底部に至る。At this time, the rear part of the amplifier section 13 passes through the center of the printed circuit board 17 and reaches the bottom of the middle body 15.

中ボディ１５の底部には天井取付用のベース１９が嵌着
される開口部が開口している。ボディ１４の開口部には
不要な光が入光しないように所定の波長の光をカットす
るフィルター材からなるカバー２０を被着しており、こ
のカバー２０の周縁はボディ１４の開口縁と中ボデイエ
５の開口縁との間で挟持している。The bottom of the middle body 15 has an opening into which a ceiling mounting base 19 is fitted. The opening of the body 14 is covered with a cover 20 made of a filter material that cuts light of a predetermined wavelength to prevent unnecessary light from entering. It is held between the opening edge of the bodyier 5.

尚上記実施例１では凸レンズ６としては楕円状の広角レ
ンズを使用しているが、第８図（ａ）　　（ｂ）に示す
ように受光素子１の受光面に対応する底面に凹部２１を
形成した第２曲面レンズを使用しても良い、この場合図
示するように光信号Ｘの入射角θが大きくても凹部２１
と凸レンズ６との境界で受光面に向けて屈折させること
ができ、そのなめ実施例１と同様な受光面積の小さい受
光素子１を使用しても広角化が図れ、しかも楕円状の凸
レンズに比べて厚みを薄くできて、レンズの軽量化が図
れる。In the first embodiment, an elliptical wide-angle lens is used as the convex lens 6, but a recess 21 is formed on the bottom surface corresponding to the light receiving surface of the light receiving element 1, as shown in FIGS. In this case, as shown in the figure, even if the incident angle θ of the optical signal X is large, the concave portion 21
The light can be refracted toward the light-receiving surface at the boundary between the ellipsoid and the convex lens 6, and even if the light-receiving element 1 with a small light-receiving area, similar to that in Embodiment 1, is used, the angle of view can be widened, and compared to an elliptical convex lens. This allows the lens to be made thinner and lighter.

火夫自Ｉλ 上記実施例では発光素子３を外斜め方向に向けて広い範
囲で光信号を送信することができるようにしたものであ
るが、本実施例では第９図（ａ）、　（ｂ）に示すよう
に各発光素子３に夫々対応して集光用の凸レンズ２２を
発光素子３の前方に各別に配置して、発光素子３から出
た光信号Ｘを偏光されることなく対応する端末器に向け
て送信することができるようにしである。従って本実施
例では光信号Ｘの伝送効率を高め、伝送距離の延長が図
れる。尚凸レンズ２２の口径及び凸レンズ２２と発光素
子３との距離を変更することにより、発光側の指向性も
使用目的に合わせて自由に変更することができる。Fireman's Iλ In the above embodiment, the light emitting element 3 is directed outward in a diagonal direction so that optical signals can be transmitted over a wide range. ), a convex lens 22 for condensing light is placed in front of each light emitting element 3 in correspondence with each light emitting element 3, so that the optical signal X emitted from the light emitting element 3 is handled without being polarized. This allows it to be transmitted to the terminal. Therefore, in this embodiment, the transmission efficiency of the optical signal X can be increased and the transmission distance can be extended. By changing the aperture of the convex lens 22 and the distance between the convex lens 22 and the light emitting element 3, the directivity of the light emitting side can also be freely changed according to the purpose of use.

受光素子１の前方に配置した凸レンズ６は口径の大きい
広角レンズからなり、実施例１と同様に入射角θが大き
くなっても光信号Ｘを受光することができるようになっ
ている。The convex lens 6 disposed in front of the light-receiving element 1 is made of a wide-angle lens with a large aperture, and can receive the optical signal X even if the incident angle θ becomes large, as in the first embodiment.

第１０図は上記光学系構造の実装例を示しており、この
実施例の場合には上下２枚の保持枠２３ａ、２３ｂを使
用して各２枚合わの凸レンズ６と、集光用の凸レンズ２
２を一体に固定保持し、この保持した状態で受光素子１
及び発光素子３の前方に配設するようになっている。FIG. 10 shows an example of mounting the above optical system structure. In this embodiment, two upper and lower holding frames 23a and 23b are used to attach two convex lenses 6 and a condensing convex lens. 2
2 are fixed and held together, and in this held state, the light receiving element 1
and in front of the light emitting element 3.

保持枠２３ａ、２３ｂは第１１図に示すように中央に凸
レンズ６に対応する円孔２４を形成するとともに、この
円孔２４を中心としてこの円孔２４の回りに凸レンズ２
２を嵌め込む角孔２５を発光素子３の数だけ等間隔に形
成してあり、上側の保持枠２３ａの各孔２４，２５の裏
面側の開口縁には夫々凸レンズ６．２２の周縁が係合す
る段部２６、を形成しである。而して各凸レンズ６．２
２を一方の保持枠２３ａ又は２３ｂの対応する孔２４．
２５に裏面側から嵌め込んで、他方の保持枠２３ｂ又は
２３ａを重ね、保持枠２３ａ、２３ｂに穿設したねじ孔
２７を介して後述の固定金具２８に固定ビスを螺合締結
することにより各凸レンズ６．２２を保持枠２３ａ、２
３ｂ間に挟持させた形で固定できるのである。As shown in FIG. 11, the holding frames 23a and 23b have a circular hole 24 in the center corresponding to the convex lens 6, and the convex lens 2 is formed around the circular hole 24 around the circular hole 24.
Square holes 25 into which the lenses 6 and 2 are fitted are formed at equal intervals equal to the number of light emitting elements 3, and the peripheral edge of a convex lens 6 and 22 is engaged with the opening edge on the back side of each hole 24 and 25 of the upper holding frame 23a. A matching step portion 26 is formed. Therefore, each convex lens 6.2
2 into the corresponding hole 24.2 of one of the holding frames 23a or 23b.
25 from the back side, overlap the other holding frame 23b or 23a, and screw and fasten a fixing screw to a fixing fitting 28 (described later) through the screw hole 27 drilled in the holding frames 23a, 23b. The convex lens 6.22 is held by the holding frame 23a, 2
It can be fixed by being sandwiched between 3b.

固定金具２８は両側片２８ａの中間部より内向き対向突
出させた突片２８ｂ間に、受光索子１を備えたアンプ部
１３を固持し発光素子３を配線したプリント基板からな
る取付板５を配置固定しており、上記保持枠２３ａ、２
３ｂは固定金具２８の両側片２８ａ先端に内向き対向突
出させた突片２８ｃ間に配置固定されて、各凸レンズ６
．２２が受光素子１、発光素子３の前方に位置するので
ある。The fixing fitting 28 has a mounting plate 5 made of a printed circuit board, which holds the amplifier part 13 equipped with the light receiving cable 1 and has the light emitting element 3 wired therebetween, between protruding pieces 28b that project inwardly from the intermediate parts of the side pieces 28a. The arrangement is fixed, and the holding frames 23a, 2
3b is arranged and fixed between protruding pieces 28c which are made to protrude inwardly from the ends of both side pieces 28a of the fixing fitting 28, and each convex lens 6
．． 22 is located in front of the light receiving element 1 and the light emitting element 3.

第１３図（ａ）、（ｂ）は上述のように光字系ｍ造と、
回路素子とを配置固定した固定金が３２８を実装する端
末器を示しており、この端末器は第１４図に示すように
基部のベース５０と、このベース５０に対して０″〜３
６０°の範囲で水平方向に回転自在に収り付けられたボ
ディ２９と２このボディ２９の前部から頂部に至るよう
に穿設した開口窓３１に嵌着された透光性のカバー３０
とから構成される。FIGS. 13(a) and 13(b) show the optical character system m structure as described above,
The fixing metal 328 on which the circuit elements are arranged and fixed represents a terminal device in which the terminal device 328 is mounted, and as shown in FIG.
A translucent cover 30 is fitted into an opening window 31 drilled from the front to the top of the body 29 and the body 29, which are housed so as to be freely rotatable in the horizontal direction within a range of 60 degrees.
It consists of

机上等は固定されるベース５０は外形が円柱状に形成さ
れ、上面周部には全周に亘って凹溝３２を設け、上面中
央には孔３３を穿孔しである。ボデイ２９は前部から頂
部に至るようにカバー３０を嵌着する開口窓３１を形成
した有底筒状のもので、底部はボディ２９の上記孔３３
に対して００〜３６０°の範囲で水平方向に回転自在に
係合した軸体を備えた押え板３４に固定され、ベース２
８に対して水平方向に回転自在となっている。そして底
面には上記凹溝３２の内壁面に沿うように嵌まる突片３
５を外周縁に突設しているベース板３６を固定している
。The base 50, which is fixed on a desk or the like, has a cylindrical outer shape, has a groove 32 around the entire circumference of the upper surface, and has a hole 33 bored in the center of the upper surface. The body 29 has a cylindrical shape with a bottom and has an opening window 31 into which a cover 30 is fitted from the front to the top, and the bottom is connected to the hole 31 of the body 29.
The base 2
It is rotatable in the horizontal direction with respect to 8. A protrusion 3 that fits along the inner wall surface of the groove 32 is provided on the bottom surface.
5 is fixed to a base plate 36 protruding from the outer peripheral edge.

またボディ９内には上述した構成の固定金具２８を００
〜９０°の範囲で垂直方向に回転自在に枢支しである。Furthermore, a fixing fitting 28 having the above-mentioned structure is installed inside the body 9.
It is pivotably supported for rotation in the vertical direction within a range of ~90°.

一方の側片２８ａにはボディ２９の一方の内側側面より
突設した軸３７を回転自在に貫通させ、他方の側片２７
ｂの外面に取り付けた回転つまみ３８をボディ２９の他
方の側面に開口した孔３９に内側から回転自在に嵌挿し
て回転つまみ３８をボディ２９の外側に露呈させ、ボデ
ィ２９に対して固定金具２８を垂直方向に回転できるよ
うに枢支しである。そして第１５図（ａ）　（ｂ）に示
すようにこの回転つまみ３８の基部周縁に設けた鍔部３
８ａには０°〜９０゛の範囲で複数の溝４０を等間隔で
周方向に列設し、この満４０に対応するボディ３９の内
側側面には係合突起４１を設けである。カバー３０はボ
ディ２９の開口窓３１の上端周縁に設けた係止片４６の
満４７に内周縁を係合させてボディ２９に固定される。A shaft 37 protruding from one inner side surface of the body 29 is rotatably passed through one side piece 28a, and the other side piece 27
The rotary knob 38 attached to the outer surface of the body 29 is rotatably inserted from the inside into the hole 39 opened on the other side of the body 29 to expose the rotary knob 38 to the outside of the body 29. It is pivoted so that it can be rotated vertically. As shown in FIGS. 15(a) and 15(b), a flange 3 is provided on the periphery of the base of the rotary knob 38.
8a, a plurality of grooves 40 are arranged circumferentially at equal intervals in the range of 0° to 90°, and engagement protrusions 41 are provided on the inner side surface of the body 39 corresponding to the grooves 40. The cover 30 is fixed to the body 29 by engaging the inner circumferential edge thereof with a locking piece 46 provided at the upper edge of the opening window 31 of the body 29.

而して端末器の光学系を対応する端末器に向ける当たっ
ては、まず水平方向にボディ２９を回転させて方位を定
める。この際回転位置を固定するためにベース５０の周
壁より螺入させた固定螺子４２の先端でボディ２９の底
面に突設した突片３５を押圧して突片３５を凹溝３２の
内周壁面と固定螺子４２との間で固定し、ボディ２９の
回転を規制する。In order to direct the optical system of the terminal device toward the corresponding terminal device, first, the body 29 is rotated in the horizontal direction to determine the orientation. At this time, in order to fix the rotational position, the tip of the fixing screw 42 screwed into the peripheral wall of the base 50 presses the protruding piece 35 protruding from the bottom surface of the body 29, and the protruding piece 35 is attached to the inner circumferential wall surface of the groove 32. and a fixing screw 42 to restrict rotation of the body 29.

次に光学系を相手側の端末器方向に向けるため回転つま
み３８をボディ２９の外部より回転させて固定金具２７
を所定の角度に回転する。Next, in order to orient the optical system toward the other party's terminal device, rotate the rotary knob 38 from the outside of the body 29 and
Rotate to a specified angle.

ここで軸３７にはボディ９の内側側面と取付金具２７の
側片２７との間において押さえばね４３を縮設しである
から、回転させる際には押さえばね４３の弾発力に抗す
るように回転つまみ３８を押さえ込み、係合突起４１と
溝４０との係合を外した状態で回転つまみ３８を回転さ
せる。そして矢印４４の向きが丁度相手側の端末器に向
いたところで、回転つまみ３８の押さえを解除すれば押
さえばね４３の弾発力で回転つまみ３８の鍔部３８ａが
ボディ３９の内側側面に圧接し、１１４４０と係合突起
４１とが係合して回転位置を固定する。Here, since a presser spring 43 is compressed on the shaft 37 between the inner side surface of the body 9 and the side piece 27 of the mounting bracket 27, it is necessary to resist the elastic force of the presser spring 43 when rotating. The rotary knob 38 is pressed down, and the rotary knob 38 is rotated while the engagement protrusion 41 and the groove 40 are disengaged. Then, when the direction of the arrow 44 is exactly facing the terminal device on the other side, when the pressure on the rotary knob 38 is released, the flange 38a of the rotary knob 38 is pressed against the inner side surface of the body 39 by the elastic force of the presser spring 43. , 11440 and the engagement protrusion 41 engage to fix the rotational position.

以上のようにして本実施例では光学系を水平方向で３６
０°回転させることができ、また垂直方向で９０°回転
させることができ、受光部と投光部の光軸を任意の方向
に向けることができるのである。As described above, in this embodiment, the optical system is
It can be rotated by 0° or 90° in the vertical direction, and the optical axes of the light receiving section and the light projecting section can be directed in any direction.

尚実施例２では凸レンズ６．２２として個別のレンズを
用いたが、第１６図（ａ）、（ｂ）に示すように透過率
のよいアクリル樹脂板などからなる材料を用い、受光素
子１、発光素子３に夫々対応する部位をレンズ形状に形
成して凸レンズ６゜２２を一枚のレンズ板４５として一
体化を図ってらよく、この場合レンズ板４５を固定金具
２８に直接固定する。またレンズ形状としては第１７図
（ａ）、（ｂ）のようにフレネルレンズとしてもよい。In Example 2, individual lenses were used as the convex lenses 6 and 22, but as shown in FIGS. The parts corresponding to the light emitting elements 3 may be formed into a lens shape, and the convex lenses 6.degree. 22 may be integrated as one lens plate 45. In this case, the lens plate 45 is directly fixed to the fixture 28. Further, the lens shape may be a Fresnel lens as shown in FIGS. 17(a) and 17(b).

これらレンズ一体化によつ゛て保持枠２３ａ、２３ｂが
不要となるばかりでなく、素子とレンズ部位との位置関
係のばらつきが少なくなり、伝送特性にばらつきが生じ
ない。By integrating these lenses, the holding frames 23a and 23b are not only unnecessary, but also variations in the positional relationship between the element and the lens portion are reduced, so that variations in transmission characteristics do not occur.

［発明の効果］ 請求項１記載の発明は発明は光信号を相手側の端末器に
向けて投光部より送信し、相手側の端末器からの光信号
を受光する受光部を備え、光空間伝送により伝送信号を
伝送する光線式伝送システムの端末器において、中央に
受光部の受光素子を配置し、該受光素子の周部に投光部
の複数の発光素子を等間隔に配設し、受光素子の前方に
受光用の広角レンズを配置しであるから、対応する端末
器からの光信号は受光用の広角レンズを介して受光部の
受光素子に受光されるため、大きな入射角の光信号でも
１個の受光素子で受光でき、また広角であるから多少の
光軸のずれがあっても光信号の受光を確実にするという
効果がある。また請求項２記載の発明は各発光素子の前
方に集光レンズを配設しであるから、偏光することなく
光信号を伝送することもできる。[Effects of the Invention] The invention as claimed in claim 1 is a method for transmitting an optical signal from a light projecting unit toward a terminal on the other side, and a light receiving unit for receiving an optical signal from the terminal on the other side, In a terminal device of an optical transmission system that transmits a transmission signal by spatial transmission, a light receiving element of a light receiving part is arranged in the center, and a plurality of light emitting elements of a light projecting part are arranged at equal intervals around the light receiving element. Since a wide-angle lens for light reception is placed in front of the light-receiving element, the optical signal from the corresponding terminal device is received by the light-receiving element of the light-receiving section via the wide-angle lens for light reception, so it is difficult to detect large angles of incidence. Even an optical signal can be received by a single light receiving element, and since it has a wide angle, it is effective in ensuring that the optical signal is received even if there is some deviation of the optical axis. Furthermore, since the invention as claimed in claim 2 has a condenser lens disposed in front of each light emitting element, it is also possible to transmit an optical signal without polarization.

請求項３記載の発明は請求項１又は２記載の発明におい
て受光用の広角レンズを楕円レンズで構成したものであ
るから、受光用に使用するレンズが一枚で済み、特に請
求項４記載の発明は請求項受光用の広角レンズを裏面中
心部に凹所を設けた第２曲面レンズで構成したものであ
るから、レンズの軽量化、薄肉化が図れる。The invention according to claim 3 is the invention according to claim 1 or 2, in which the wide-angle lens for receiving light is constituted by an elliptical lens, so that only one lens is required for receiving light. In the invention, the wide-angle lens for light reception as claimed in the claims is constituted by a second curved lens having a recess at the center of the back surface, so that the lens can be made lighter and thinner.

また請求項５記載の発明は受光用の広角レンズ及び集光
レンズを上下２枚の保持枠で挟持固定したものであるか
ら、レンズの装着が簡単に行えるものである。Further, in the invention as set forth in claim 5, since the wide-angle lens for light reception and the condensing lens are clamped and fixed between two upper and lower holding frames, the lenses can be easily attached.

また更に請求項６又は７記載の発明は集光レンズと広角
レンズとを一体に形成した一枚のレンズ板を用いたもの
であるから、保持枠などの部品を必要とせず、端末器の
軽量化と低コスト化が図れ、更に組み立ても簡単となる
という効果があり、更にまた各レンズ間のばらつきもな
いから各素子との対応関係にずれが生じに＜＜、伝送の
信頼性も高くなるという効果がある。Furthermore, since the invention according to claim 6 or 7 uses a single lens plate in which the condensing lens and the wide-angle lens are integrally formed, parts such as a holding frame are not required, and the terminal device is lightweight. This has the effect of reducing costs and making it easier to assemble.Furthermore, since there is no variation between lenses, there is no misalignment in the correspondence with each element, and the reliability of transmission is increased. There is an effect.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図（ａ）及び（ｂ）は本発明の実施例１の一部破断
省略した上面図及び側断面図、第２図は同上使用の凸レ
ンズの拡大側面図、第３図は同上の凸レンズの取付構造
の要部の一部破断省略した上面図、第４図は同上の凸レ
ンズの取付構造の要部の一部省略した側面図、第５図は
同上使用の端末器の断面図、第６図（ａ）、（ｂ）は同
上端末器使用のボディの縮小上面図、一部破断した縮小
側面図、第７図（ａ）及び（ｂ）は同上端末器使用の中
ボディの縮小上面図、縮小側断面図、第８図（ａ）。 （ｂ）は同上の凸レンズの別の例の上面図、断面図、第
９図（ａ）、（ｂ）は本発明の実施例２の一部破断省略
した上面図及び側断面図、第１０図は同上の取付説明用
の分解断面図、第１１図は同上使用の保持枠の上面図、
第１２図は同上使用の固定金具の上面図、第１３図（ａ
＞、（ｂ）は同上使用の端末器の縮小正面図、縮小側面
図、第１４図は同上使用の端末器の断面図、第１５図は
（ａ）及び（ｂ）は同上端末器の要部の一部破断省略し
た拡大斜視図及び正面図、第１６図（ａ）、（ｂ）は同
上使用のレンズ構成の別例の敢面図、上面図、第１７図
（ａ）、（ｂ）は同上使用のレンズ構成の他側の上面図
、断面図、第１８図は光線式伝送システムの構成図、第
１９図は同上の端末器の配置側温、第２０図（ａ）及び
（ｂ）は従来例の端末器の光学系の構造を示す一部破断
省略した上面図及び側断面図、第２１図は同上の動作説
明図、第２２図（ａ）、（ｂ）及び（ｅ）は複数の受光
素子を用いた受光部の構成を示す一部破断省略した上面
図、側断面図及び回路図である。 １は受光素子、３は発光素子、６．２２は凸レンズ、４
５はレンズ板である。 代理人　弁理士　石　ｆＩＩ　　長　上第２図 第３図 第４ｒ２１ 第５ 図 第６図 （ｂ） 第８図 （Ｇ） （ｂ） 第９図 （ｂ） 第１ｏ図 第１３図 ＣＧ） （ｂ） 第１１図 第１２図 第１４１１ 第１５図 （Ｇ） （ｂ） （ｂ） 第旧図 第１９図 第１７図 （Ｇ） （ｂ） 第に図 第２１図1(a) and (b) are a top view and a partially cutaway side sectional view of Example 1 of the present invention, FIG. 2 is an enlarged side view of a convex lens used in the above, and FIG. 3 is a convex lens in the same as above. FIG. 4 is a partially cut-away top view of the main part of the mounting structure for the convex lens, FIG. 5 is a cross-sectional view of the terminal device used in the above, and FIG. Figures 6 (a) and (b) are a reduced top view and partially cutaway side view of the body using the same terminal device, and Figures 7 (a) and (b) are reduced top views of the middle body using the same terminal device. Figure, reduced side sectional view, FIG. 8(a). (b) is a top view and a sectional view of another example of the same convex lens as above; FIGS. The figure is an exploded sectional view for explaining the installation of the same as above, and Figure 11 is a top view of the holding frame used in the above.
Figure 12 is a top view of the fixing bracket used as above, Figure 13 (a
＞, (b) is a reduced front view and a reduced side view of the terminal device used in the above, FIG. 14 is a sectional view of the terminal device used in the above, and FIG. 16(a) and (b) are a perspective view and a top view of another example of the lens configuration used in the above, and FIGS. 17(a) and (b). ) is a top view and cross-sectional view of the other side of the lens configuration used in the above, FIG. 18 is a configuration diagram of the optical transmission system, FIG. b) is a partially cutaway top view and side sectional view showing the structure of the optical system of a conventional terminal device, FIG. 21 is an explanatory diagram of the same operation as above, and FIGS. ) is a partially cutaway top view, side sectional view, and circuit diagram showing the configuration of a light receiving section using a plurality of light receiving elements. 1 is a light receiving element, 3 is a light emitting element, 6.22 is a convex lens, 4
5 is a lens plate. Agent Patent Attorney Ishi fII Chief Figure 2 Figure 3 Figure 4r21 Figure 5 Figure 6 (b) Figure 8 (G) (b) Figure 9 (b) Figure 1o Figure 13 CG) (b ) Figure 11 Figure 12 Figure 1411 Figure 15 (G) (b) (b) Old Figure 19 Figure 17 (G) (b) Figure 21 Figure 21

Claims (7)

【特許請求の範囲】[Claims] （１）光信号を相手側の端末器に向けて投光部より送信
し、相手側の端末器からの光信号を受光する受光部を備
え、光空間伝送により伝送信号を伝送する光線式伝送シ
ステムの端末器において、中央に受光部の受光素子を配
置し、該受光素子の周部に投光部の複数の発光素子を等
間隔に配設し、受光素子の前方に受光用の広角レンズを
配置して成ることを特徴とする光線式伝送システムの端
末器の光学系構造。(1) Optical beam transmission that transmits optical signals from a light emitter toward a terminal on the other side and includes a light receiving section that receives the optical signal from the terminal on the other side, and transmits the transmission signal by optical space transmission. In the terminal device of the system, a light-receiving element of the light-receiving part is arranged in the center, a plurality of light-emitting elements of the light-emitting part are arranged at equal intervals around the light-receiving element, and a wide-angle lens for light reception is placed in front of the light-receiving element. An optical system structure of a terminal device of a light beam transmission system, characterized by arranging. （２）光信号を相手側の端末器に向けて投光部より送信
し、相手側の端末器からの光信号を受光する受光部を備
え、光空間伝送により伝送信号を伝送する光線式伝送シ
ステムの端末器において、中央に受光部の受光素子を配
置し、該受光素子の周部に投光部の複数の発光素子を等
間隔に配設し、受光素子の前方に受光用の広角レンズを
配置し且つ各発光素子の前方に集光レンズを配設して成
ることを特徴とする光線式伝送システムの端末器の光学
系構造。(2) Optical beam transmission that transmits an optical signal from a light emitter toward a terminal on the other side and includes a light receiving section that receives the optical signal from the terminal on the other side, and transmits the transmission signal by optical space transmission. In the terminal device of the system, a light-receiving element of the light-receiving part is arranged in the center, a plurality of light-emitting elements of the light-emitting part are arranged at equal intervals around the light-receiving element, and a wide-angle lens for light reception is placed in front of the light-receiving element. 1. An optical system structure of a terminal device of a light beam transmission system, characterized in that a condenser lens is arranged in front of each light emitting element. （３）受光用の広角レンズを楕円レンズで構成して成る
ことを特徴とする請求項１又は２記載の光線式伝送シス
テムの端末器の光学系構造。(3) The optical system structure of a terminal device of a light beam transmission system according to claim 1 or 2, wherein the wide-angle lens for receiving light is constituted by an elliptical lens. （４）受光用の広角レンズを裏面中心部に凹所を設けた
第２曲面レンズで構成して成ることを特徴とする請求項
１又は２記載の光線式伝送システムの端末器の光学系構
造。(4) Optical system structure of a terminal device of a light beam transmission system according to claim 1 or 2, characterized in that the wide-angle lens for light reception is constituted by a second curved lens having a recess at the center of the back surface. . （５）受光用の広角レンズ及び集光レンズを上下２枚の
保持枠で挟持固定して成ることを特徴とする請求項２記
載の光線式伝送システムの端末器の光学系構造。(5) The optical system structure of a terminal device of a light beam transmission system according to claim 2, characterized in that a wide-angle lens for receiving light and a condensing lens are sandwiched and fixed between two upper and lower holding frames. （６）受光用の広角レンズ及び集光レンズの夫々のレン
ズ形状を形成した一枚のレンズ板を用いたことを特徴と
する請求項２記載の光線式伝送システムの端末器の光学
系構造。(6) The optical system structure of a terminal device of a light beam transmission system according to claim 2, characterized in that a single lens plate is used in which the lens shapes of a wide-angle lens for light reception and a condensing lens are formed. （７）受光用の広角レンズ及び集光レンズの夫々のレン
ズ形状を夫々フレネルレンズで形成した一枚のレンズ板
を用いたことを特徴とする請求項２又は６記載の光線式
伝送システムの端末器の光学系構造。(7) The terminal of the optical beam transmission system according to claim 2 or 6, characterized in that the lens shape of each of the wide-angle lens for light reception and the condensing lens is formed by a single lens plate formed by a Fresnel lens. Optical structure of the device.