JPS59122911A - Encoder - Google Patents

Encoder

Info

Publication number
JPS59122911A
JPS59122911A JP23267282A JP23267282A JPS59122911A JP S59122911 A JPS59122911 A JP S59122911A JP 23267282 A JP23267282 A JP 23267282A JP 23267282 A JP23267282 A JP 23267282A JP S59122911 A JPS59122911 A JP S59122911A
Authority
JP
Japan
Prior art keywords
light
slit
disk
encoder
slits
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.)
Granted
Application number
JP23267282A
Other languages
Japanese (ja)
Other versions
JPH0457965B2 (en
Inventor
Kazuhisa Takahashi
和久 高橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP23267282A priority Critical patent/JPS59122911A/en
Publication of JPS59122911A publication Critical patent/JPS59122911A/en
Publication of JPH0457965B2 publication Critical patent/JPH0457965B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
    • G01D5/34715—Scale reading or illumination devices
    • G01D5/34723—Scale reading or illumination devices involving light-guides

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)

Abstract

PURPOSE:To make it possible to omit a lens and to miniaturize the device, by collecting light emitted from a light emitting element by using a lightguide. CONSTITUTION:An encoder comprises the following parts: a light emitting element 1; a slit disk 5, on the circumference of which light transmitting parts 3 and light shielding parts 4 are arranged; a slit plate 7, which has fixed slits 6 for obtaining light signals that have phase difference; a light receiving elements 2 comprising chips; and a lightguide 9. In order to obtain the light signals having the phase difference of 90 deg., two slits 6a and 6b are provided at the outer periphery of the slit plate 7. A slit 6c is provided at the inner side of the plate 7 in order to read the number of rotation of the slit disk 5. Slits are provided at the peripheral part of the slit disk 5, and the light transmitting parts 3 and the light shielding parts 4 are alternately formed. Only one light transmitting part 3b is provided at the inner side of the disk.

Description

【発明の詳細な説明】 〔技術分野〕 この発明はサーボモーター等に使用する２以上の光信号
を受光するエンコーダに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an encoder for receiving two or more optical signals used in a servo motor or the like.

〔背景技術〕[Background technology]

従来の透過光形エンコーダの構成は第３図に示すように
、光源としての発光ダイオード等の発光素子（１）、受
光素子（２）としてフォトトランジスタあるいはフォト
ダイオード、スリットでなる透光部（３）とその間隔で
なる遮光部（４］を持つ回転スリット円板（５）および
光信号に９０°の位相差をもたせる固定スリット（６）
を有するスリット板（７）から構成されており、発光素
子（１）及び受光素子（２）にはレンズ（８）がつけら
れ光が集光するようになっている。一般にこれらの素子
は、市販のものが用いられているが大きさが決まってお
り、エンコーダを小型化するのを制限している。一方、
第４図に示す如くエンコーダを小型化するためチップ化
された受光素子（２）及び発光素子（１）を使用しこれ
に対応する小型のレンズ（８）を使用することも可能で
あるが、これらの小型のガラスのレンズ（８）を加工す
るのは難しいという欠点がある。As shown in Fig. 3, the configuration of a conventional transmitted light encoder includes a light emitting element (1) such as a light emitting diode as a light source, a phototransistor or photodiode as a light receiving element (2), and a transparent part (3) consisting of a slit. ) and a rotating slit disk (5) with a light shielding part (4) formed by the interval therebetween, and a fixed slit (6) that provides a 90° phase difference to the optical signal.
A lens (8) is attached to the light emitting element (1) and the light receiving element (2) to condense light. Generally, these elements are commercially available, but their size is fixed, which limits miniaturization of the encoder. on the other hand,
As shown in FIG. 4, in order to miniaturize the encoder, it is possible to use a chip-shaped light receiving element (2) and light emitting element (1) and a corresponding small lens (8). A drawback is that it is difficult to process these small glass lenses (8).

〔発明の目的〕[Purpose of the invention]

この発明はレンズ系を用いず、２相以上の光信号を受光
するエンコーダにおいて、光信号相互間の影響をなくし
、正確な光信号を得ることができるようにし、小型化す
ることができるエンコーダを提供せんとするものである
。The present invention provides an encoder that receives optical signals of two or more phases without using a lens system, which eliminates the influence between optical signals, can obtain accurate optical signals, and can be miniaturized. This is what we intend to provide.

〔発明の構成〕[Structure of the invention]

この発明は上記欠点を除去せんとするものであり、その
要旨とするところは２以上の光信号を受光するエンコー
ダにおいて、回転するスリット円板に対応してスリット
板を固定配置し、各光信号を透過させるスリット板の各
スリットに対応してチップ化した受光素子を配し、スリ
ット板の各スリットと各受光素子間を各々貫通孔で接続
して成るエンコーダである。This invention aims to eliminate the above-mentioned drawbacks, and its gist is that in an encoder that receives two or more optical signals, a slit plate is fixedly arranged in correspondence with a rotating slit disk, and each optical signal is This encoder is constructed by disposing a chip-shaped light receiving element corresponding to each slit of a slit plate that transmits the light, and connecting each slit of the slit plate and each light receiving element with a through hole.

以下この発明を第１図及び第２図に図示せる一実施例に
基づき説明する。The present invention will be explained below based on an embodiment shown in FIGS. 1 and 2.

エンコーダの構成は第１図のごとく、発光ダイオード等
の発光素子＋１１、透光部（３）及び遮光部（４）を円
周上に配したスリット円板（５）、９０°の位相差をも
つ光信号を得るための固定スリット＋６＋４持つスリッ
ト板、チップでなる受光素子（２）及びライトガイド（
４）からなる。As shown in Figure 1, the encoder consists of a light emitting element such as a light emitting diode +11, a slit disk (5) with a transparent part (3) and a light shielding part (4) arranged on its circumference, and a phase difference of 90°. A slit plate with fixed slits + 6 + 4 to obtain an optical signal, a light receiving element (2) consisting of a chip, and a light guide (
4).

スリット板（７）には９０点の位相差をもつ光信号を得
るために外周側に２個のスリット（６ａ）。The slit plate (7) has two slits (6a) on the outer circumferential side to obtain an optical signal with a phase difference of 90 points.

（６ｂ）が近接して開設されると共にその内周側に１個
のスリット（６Ｃ）がスリット円板（５）の回転数を読
みとるために開設されている。(6b) are opened close to each other, and one slit (6C) is opened on the inner peripheral side of the slit disc (6C) for reading the rotational speed of the slit disc (5).

スリット円板（５）には、外周に等間隔でスリットを開
設し透光部（３）及び遮光部（４）が交互に形成される
と共にその内周側に透光部（３ｂ）が１個のみ開設され
ている。In the slit disk (5), slits are formed at equal intervals on the outer circumference, and light-transmitting parts (3) and light-blocking parts (4) are formed alternately, and one light-transmitting part (3b) is formed on the inner circumference side. Only one has been opened.

而してスリット円板（５）はサーボモータ等の回転軸（
１１）に取着され、該スリット円板（５１の透光部ｆ３
１．（３ｂ）に対応せしめてスリット板（７）が固定し
て配され、これに対応して反スリツト板（７）側に発光
ダイオードでなる発光素子ｆｉｌが透光ｍｆ３］。Therefore, the slit disk (5) is connected to a rotating shaft (of a servo motor, etc.).
11), and the transparent part f3 of the slit disk (51)
1. A slit plate (7) is fixedly disposed corresponding to (3b), and a light emitting element fil made of a light emitting diode is provided on the side opposite to the slit plate (7).

（３ｂ）に対応して配置されている。またスリット板（
７）側にスリット板（７）及び発光素子（１）に対応し
てチップでなる受光素子（２）が配されている。It is arranged corresponding to (3b). Also, slit plate (
On the 7) side, a light receiving element (2) made of a chip is arranged corresponding to the slit plate (7) and the light emitting element (1).

ライトガイド（９）は３個の貫通孔（ｌＯ）を有する短
かい筒体で、各貫通孔（１０）は一端が各受光素子（２
）に対応し、他端がスリット板（７）の各スリット（０
）に対応するように配置されているものである。The light guide (9) is a short cylinder having three through holes (lO), and each through hole (10) has one end connected to each light receiving element (2).
), and the other end corresponds to each slit (0
).

而して発光素子（１）力ごら発せられ透光部（３）及び
スリット（６）を通過する３条の光はライトガイド（９
）の各貫通孔（９１を介し、てチップでなる受光素子（
２）に導かれ、スリット円板（５）の回転方向、回転数
等を検出するのである。The three lines of light emitted from the light emitting element (1) and passing through the transparent part (3) and the slit (6) are transmitted through the light guide (9).
) through each through-hole (91), the light-receiving element (
2), the rotation direction, rotation speed, etc. of the slit disk (5) are detected.

〔発明の効果〕〔Effect of the invention〕

以上の如くこの発明におけるエンコータにおいては発光
素子の出す光を集光するためにライトガイドを使用する
ので、レンズを使用する必要がなく、またライトガイド
の各貫通孔内を通る光はそわぞれ相互にクロストークす
ることがないから、受光素子としてチップ化した受光素
子を使用することができ小型化できるものである。As described above, in the encoder according to the present invention, the light guide is used to collect the light emitted by the light emitting element, so there is no need to use a lens, and the light passing through each through hole of the light guide is different. Since there is no mutual crosstalk, a chip-shaped light receiving element can be used as the light receiving element, and the size can be reduced.

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

第１図及び第２図はこの発明の一実施例を示す斜視図、
第３図及び第４図は各々従来例を示す斜視図である。 特許出願人 松下電工株式会社 代理人弁理士　　竹　元　敏　丸 （ほか２名） 一団 第１図FIG. 1 and FIG. 2 are perspective views showing one embodiment of the present invention;
3 and 4 are perspective views each showing a conventional example. Patent applicant Matsushita Electric Works Co., Ltd. Representative patent attorney Toshimaru Takemoto (and 2 others) Group 1 Figure 1

Claims (1)

【特許請求の範囲】[Claims] （１）２以上の光信号を受光するエンコーダにおいて、
回転するスリット円板に対応してスリット板を固定配置
し、各光信９号を透過させるスリット板の各スリットに
対応してチップ化した受光素子を配し、スリット板の各
スリットと各受光素子間を各々貫通孔で接続して成るエ
ンコーダ。(1) In an encoder that receives two or more optical signals,
A slit plate is fixedly arranged corresponding to the rotating slit disk, and a light receiving element made into a chip is arranged corresponding to each slit of the slit plate through which each optical signal No. 9 is transmitted, and each slit of the slit plate and each light receiving element are arranged in a fixed manner. An encoder that is connected through holes between the two.
JP23267282A 1982-12-28 1982-12-28 Encoder Granted JPS59122911A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23267282A JPS59122911A (en) 1982-12-28 1982-12-28 Encoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23267282A JPS59122911A (en) 1982-12-28 1982-12-28 Encoder

Publications (2)

Publication Number Publication Date
JPS59122911A true JPS59122911A (en) 1984-07-16
JPH0457965B2 JPH0457965B2 (en) 1992-09-16

Family

ID=16942983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23267282A Granted JPS59122911A (en) 1982-12-28 1982-12-28 Encoder

Country Status (1)

Country Link
JP (1) JPS59122911A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5641208U (en) * 1979-09-06 1981-04-16

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5641208U (en) * 1979-09-06 1981-04-16

Also Published As

Publication number Publication date
JPH0457965B2 (en) 1992-09-16

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