JP2519247B2 - Signal extractor for rotating drum - Google Patents
Signal extractor for rotating drumInfo
- Publication number
- JP2519247B2 JP2519247B2 JP62130248A JP13024887A JP2519247B2 JP 2519247 B2 JP2519247 B2 JP 2519247B2 JP 62130248 A JP62130248 A JP 62130248A JP 13024887 A JP13024887 A JP 13024887A JP 2519247 B2 JP2519247 B2 JP 2519247B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- axis
- light
- rotating drum
- electro
- 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 - Fee Related
Links
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、VTR等の回転ドラムより信号を取出す信号
取出装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a signal extracting device for extracting a signal from a rotary drum such as a VTR.
＜従来の技術＞ 回転している回転ドラムより信号を取出す場合、古く
はスリップリングとブラシ、最近では平盤形のフェライ
トコアを向い合せに配置したロータリートランスが用い
られる。<Prior Art> When extracting a signal from a rotating rotary drum, a slip ring and a brush are used in the old days, and a rotary transformer in which flat plate-shaped ferrite cores are arranged face to face is used recently.
しかしながら、スリップリングとブラシは接触ノイズ
が発生し、また信頼性に欠ける。ロータリートランスに
ついても、伝達損失があることや、クロストーク及び性
能を上げるためには、ギャップ幅を狭くし対向面積を広
くしなければならない。However, slip rings and brushes produce contact noise and are unreliable. Also in the rotary transformer, in order to have a transmission loss and to improve crosstalk and performance, it is necessary to narrow the gap width and widen the facing area.
そこで、第３図に示すように、回転ドラム１の回転軸
Ａ−Ａ′上に電光変換器２、また固定側に光電変換器３
を備えた信号取出装置が提案される。Therefore, as shown in FIG. 3, the electro-optical converter 2 is provided on the rotary shaft AA ′ of the rotary drum 1, and the photoelectric converter 3 is provided on the fixed side.
A signal extraction device provided with is proposed.
＜発明が解決しようとする問題点＞ しかしながら、第３図の場合も、１チャンネルしか使
用できない。あるいは、電光変換器２を回転ドラム１の
軸に取付けなければならない、等の機構、組立上の問題
点がある。<Problems to be Solved by the Invention> However, even in the case of FIG. 3, only one channel can be used. Alternatively, there are problems in the mechanism and assembly such that the electro-optical converter 2 must be attached to the shaft of the rotary drum 1.
本発明は、電光変換器を軸上以外に設けることがで
き、かつ多チャンネルの構成も容易な信号取出装置を提
供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a signal extraction device which can be provided with an electro-optical converter other than on the axis, and which has a simple multi-channel configuration.
＜問題点を解決するための手段＞ 本発明は、回転ドラムの軸と同軸にファイバの受光面
の軸を置いたファイバと、ファイバ受光面において、回
転ドラムの軸と任意のθなる角度に発光方向の軸を合わ
せるようにして回転ドラムに固定した電光変換器と、フ
ァイバ発光面においてファイバ発光面の軸にθなる角度
をなした位置に光電変換器を具備することを特徴とす
る。<Means for Solving Problems> The present invention is directed to a fiber in which the axis of the light-receiving surface of the fiber is coaxial with the axis of the rotating drum, and the fiber light-receiving surface emits light at an angle of θ with the axis of the rotating drum. It is characterized in that it is provided with an electro-optical converter fixed to a rotating drum so that the axes of the directions are aligned with each other, and a photoelectric converter at a position at an angle of θ with the axis of the fiber emitting surface on the fiber emitting surface.
＜作 用＞ ファイバは、一般に光がファイバ受光面の軸に対して
θなる角度で受光面に入射された時、ファイバ発光面の
軸に対してθなる角度で光が円錐状に出力されることが
知られている。特に、ステップインデックス型ファイバ
においては、出力光は円錐状の側面のみとなる。<Operation> In general, when light is incident on the light receiving surface at an angle of θ with respect to the axis of the fiber light receiving surface, the light is output as a cone at an angle of θ with respect to the axis of the fiber light emitting surface. It is known. Particularly, in the step index fiber, the output light is only the side surface of the conical shape.
上記信号取出装置において、電光変換器，ファイバ，
光電変換器からなり、電光変換器は回転ドラム上に位置
し、その発光方向は、回転ドラム軸と同軸に置いたファ
イバ受光面の軸にθなる角度で入射する位置に置くた
め、回転ドラム軸と離れた位置に置くことができる。ま
た、θなる角度をθ1,θ2,…，θｎとすることにより、
複数チャンネルにすることもできる。In the signal extraction device, an electro-optical converter, a fiber,
It consists of a photoelectric converter, and the electro-optical converter is located on the rotating drum, and its light emitting direction is set so as to be incident on the axis of the fiber light receiving surface coaxial with the rotating drum axis at an angle of θ. And can be placed in a remote position. Further, by setting the angle θ to be θ 1 , θ 2 , ..., θn,
There can be multiple channels.
＜実施例＞ 以下、図面を参照して本発明の一実施例を説明する。<Example> Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図において、回転ドラムの信号取出装置は回転ド
ラム１と電光変換器２とファイバ４と光電変換器３とを
備えてなる。In FIG. 1, the signal extraction device for the rotary drum comprises a rotary drum 1, an electro-optical converter 2, a fiber 4 and a photoelectric converter 3.
一点鎖線Ａ−Ａ′は回転ドラム１の軸であり、本実施
例においては、ファイバ４の軸でもある。電光変換器３
は、回転ドラム１に固定されてあり回転ドラム１と同様
に回転ドラム軸Ａ−Ａ′を中心に回転している。また電
光変換器２の発光方向の軸は、ファイバ受光面ａの中心
軸に向いている。この時、回転ドラム軸Ａ−Ａ′すなわ
ちファイバ受光面ａの軸と電光変換器２の発光方向の軸
となす角はθである。ファイバ４のファイバ受光面ａの
軸にθなる角度で入射された光は、前述したファイバの
作用により、ファイバ４の発光面ｂからファイバ発光面
ｂの軸、本実施例においては回転ドラム１の軸Ａ−Ａ′
からθなる角度で、円錐状に放射される。光電変換器３
は、この円錐状に放射された面の任意の１点に配置さ
れ、光電変換器３の受光軸は、ファイバ３の発光面ｂの
中心に向けておく。The alternate long and short dash line AA 'is the axis of the rotary drum 1, and in the present embodiment is also the axis of the fiber 4. Lightning converter 3
Is fixed to the rotary drum 1 and rotates about the rotary drum shaft AA ′ as in the rotary drum 1. The axis of the light emitting direction of the electro-optical converter 2 is oriented to the central axis of the fiber light receiving surface a. At this time, the angle formed by the rotary drum axis A-A ', that is, the axis of the fiber light receiving surface a and the axis of the light emitting direction of the electro-optical converter 2 is θ. The light incident on the axis of the fiber light-receiving surface a of the fiber 4 at an angle of θ is caused by the action of the fiber described above from the light-emitting surface b of the fiber 4 to the axis of the fiber light-emitting surface b, in this embodiment, the rotating drum 1. Axis A-A '
Is emitted in a conical shape at an angle of θ. Photoelectric converter 3
Are arranged at any one point on the surface radiated in a conical shape, and the light receiving axis of the photoelectric converter 3 is directed toward the center of the light emitting surface b of the fiber 3.
上記構成において、回転ドラム１とともに電光変換器
２が回転しても、電光変換器２の発光方向の軸とファイ
バ３の受光面ａの軸Ａ−Ａ′のなす角θは変化しない。
従って、電光変換器２がどの位置にあっても、光電変換
器４は固定したまま受光することができる。In the above configuration, even if the electro-optical converter 2 rotates together with the rotary drum 1, the angle θ formed by the axis of the light-emitting direction of the electro-optical converter 2 and the axis AA ′ of the light-receiving surface a of the fiber 3 does not change.
Therefore, regardless of the position of the electro-optical converter 2, the photoelectric converter 4 can receive light while being fixed.
第２図は他の実施例を示す図で、ファイバ４を屈曲さ
せ、また、電光変換器２及び光電変換器３をそれぞれ複
数個設けた例を示している。FIG. 2 is a view showing another embodiment, showing an example in which the fiber 4 is bent and a plurality of electro-optical converters 2 and photoelectric converters 3 are provided.
本例のようにファイバ４を屈曲しても動作には何ら支
障がなく、これによれば、回転ドラム１を含む信号取出
装置の高さを低くすることが可能である。また、回転ド
ラム１の軸Ａ−Ａ′すなわちファイバ４のファイバ受光
面ａの軸と電光変換器２−1,2−２の発光方向の軸とな
す角をそれぞれθ1,θ２とすることにより、２チャンネ
ルの信号取出を行なうことができる。Even if the fiber 4 is bent as in this example, there is no hindrance to the operation, and according to this, it is possible to reduce the height of the signal extraction device including the rotating drum 1. Further, to the shaft and electrooptical converter fiber receiving surface a of the axis A-A 'i.e. fiber 4 of the rotary drum 1 2 1, 2 2 of the emission direction of the axis and angle, respectively theta 1, and theta 2 Thus, it is possible to take out signals of two channels.
第２図において、一点鎖線Ａ−Ａ′は回転ドラム１の
軸であり、本実施例ではファイバ４の受光面ａの軸であ
る。電光変換器２−1,2−２の発光方向の軸はそれぞれ
ファイバ４の受光面ａの中心軸に向けられ、ファイバ４
の受光面ａの軸となす角がそれぞれθ1,θ２となる位置
に固定される。ファイバ４のファイバ受光面ａの軸にθ
１及びθ２なる角度で入射された光は、前述したファイ
バの作用により、ファイバ４の発光面ｂからファイバ４
の発光面ｂからファイバ発光面の軸，本実施例において
はＢ−Ｂ′からそれぞれθ１及びθ２なる角度で円錐状
に放射される。光電変換器３−1,3−２はこの円錐状に
放射された面の任意の点にそれぞれ配置され、光電変換
器３−1,3−２の受光軸はファイバ４の発光面ｂの中心
軸に向けられる。In FIG. 2, the alternate long and short dash line AA 'is the axis of the rotary drum 1, and in this embodiment is the axis of the light receiving surface a of the fiber 4. Electrooptical converter 2 1, directed to the center axis of the light receiving surface a of each axial direction of light emission of 2-2 fiber 4, the fiber 4
Are fixed at positions where the angles with respect to the axis of the light receiving surface a are θ 1 and θ 2 , respectively. Θ on the axis of the fiber receiving surface a of the fiber 4
The light incident at an angle of 1 and θ 2 is transmitted from the light emitting surface b of the fiber 4 to the fiber 4 by the action of the fiber described above.
The light is emitted in a conical shape from the light emitting surface b of the fiber, the axis of the fiber light emitting surface, and in the present embodiment from BB 'at angles of θ 1 and θ 2, respectively. The photoelectric converter 3-1, 3-2 are arranged on any point of the emitted plane to the cone, the photoelectric converter 3-1, the light receiving axis of the 3-2 of the light-emitting surface b of the fiber 4 center Oriented to the axis.
本例では２チャンネルであるが、電光変換器２、光電
変換器３及びθをそれぞれｎ個とすることで多チャンネ
ルも可能である。In this example, there are two channels, but it is possible to have multiple channels by setting the number of each of the electro-optical converter 2, the photoelectric converter 3, and θ to n.
＜発明の効果＞ 以上のように本発明によれば、回転ドラムの軸から離
れた所に電光変換器を取付けることができまた多チャン
ネルも可能な有益な信号取出装置が提供できる。<Effects of the Invention> As described above, according to the present invention, it is possible to provide a useful signal extraction device in which the electro-optical converter can be mounted at a position distant from the axis of the rotating drum and multi-channels are possible.
第１図は本発明の一実施例を示す装置概念図、第２図は
本発明の他の実施例を示す装置概念図、第３図は従来例
を示す装置概念図である。 １……回転ドラム、２……電光変換器、３……光電変換
器、４……ファイバ、ａ……ファイバ受光面、ｂ……フ
ァイバ発光面。FIG. 1 is a conceptual view of a device showing an embodiment of the present invention, FIG. 2 is a conceptual view of a device of another embodiment of the present invention, and FIG. 3 is a conceptual view of a device showing a conventional example. 1 ... rotating drum, 2 ... electro-optical converter, 3 ... photoelectric converter, 4 ... fiber, a ... fiber receiving surface, b ... fiber emitting surface.
Claims (1)
において、 回転ドラムの軸と同軸にファイバの受光面の軸を置いた
ステップインデックス型のファイバと、 前記ファイバの受光面において、回転ドラムの軸と互い
に異なる角度に発光方向の軸を合わすように配置した、
回転ドラム上に固定された複数の電光変換器と、 前記ファイバの発光面において、ファイバ発光面の軸と
のなす角度が、前記回転ドラムの軸と電光変換器の発光
方向の軸とがなす角度とほぼ等しくなるよう配置した複
数の光電変換器と、を具備することを特徴とする回転ド
ラムの信号取出装置。1. A signal extraction device for extracting a signal from a rotating drum, wherein a step index type fiber having an axis of a light receiving surface of the fiber coaxial with the axis of the rotating drum, and a shaft of the rotating drum at the light receiving surface of the fiber. And arranged so that the axes of the light emission direction are aligned at different angles from each other.
A plurality of electro-optical converters fixed on a rotating drum, and the angle between the axis of the rotating drum and the axis of the light-emitting direction of the electro-optical converter, the angle between the axis of the fiber emitting surface in the light-emitting surface of the fiber. And a plurality of photoelectric converters arranged so as to be substantially equal to the signal extraction device of the rotary drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62130248A JP2519247B2 (en) | 1987-05-26 | 1987-05-26 | Signal extractor for rotating drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62130248A JP2519247B2 (en) | 1987-05-26 | 1987-05-26 | Signal extractor for rotating drum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63293700A JPS63293700A (en) | 1988-11-30 |
| JP2519247B2 true JP2519247B2 (en) | 1996-07-31 |
Family
ID=15029693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62130248A Expired - Fee Related JP2519247B2 (en) | 1987-05-26 | 1987-05-26 | Signal extractor for rotating drum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2519247B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56105303A (en) * | 1980-01-21 | 1981-08-21 | Nec Corp | Rotary type magnetic recording mechanism |
| JPS56121361U (en) * | 1980-02-15 | 1981-09-16 |
-
1987
- 1987-05-26 JP JP62130248A patent/JP2519247B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63293700A (en) | 1988-11-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |