JPH0457965B2 - - Google Patents
Info
- Publication number
- JPH0457965B2 JPH0457965B2 JP57232672A JP23267282A JPH0457965B2 JP H0457965 B2 JPH0457965 B2 JP H0457965B2 JP 57232672 A JP57232672 A JP 57232672A JP 23267282 A JP23267282 A JP 23267282A JP H0457965 B2 JPH0457965 B2 JP H0457965B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- slit
- encoder
- slit plate
- receiving element
- 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
- 230000003287 optical effect Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
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)
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.
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としてフオトトランジスタあ
るいはフオトダイオード、スリツトでなる透光部
３とその間隔でなる遮光部４を持つ回転スリツト
円板５および光信号に90°の位相差をもたせる固
定スリツト６を有するスリツト板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つている。一般
にこれらの素子は、市販のものが用いられている
が大きさが決まつており、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ツプ化された受光
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
かしいという欠点がある。
As shown in Fig. 3, the conventional transmitted light type encoder has a structure consisting of 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, a light transmitting part 3 made of a slit, and an interval between them. It is composed of a rotating slit disk 5 having a light shielding part 4 and a slit plate 7 having a fixed slit 6 that gives a 90° phase difference to the optical signal.
is attached to focus the light. Generally, these elements are commercially available, but their size is fixed, so it is possible to downsize the encoder.
It restricts what you can do. On the other hand, as shown in FIG. 4, in order to miniaturize the encoder, it is possible to use a chipped light receiving element 2 and light emitting element 1 and a corresponding small lens 8; A drawback is that it is difficult to process the glass lens 8.
この発明はレンズ系を用いず、２相以上の発信
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。
This invention eliminates the influence between optical signals in an encoder that receives emitted signals of two or more phases without using a lens system, makes it possible to obtain accurate optical signals, and provides an encoder that can be miniaturized. This is what we intend to provide.
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以上の光信号をレ
ンズ系を用いず受光するエンコーダにおいて、回
転するスリツト円板に対応してスリツト板を固定
配置し、各光信号を透過させるスリツト板の各ス
リツトに対応してチツプ化した受光素子を配し、
固定されたスリツト板の各スリツトと各受光素子
間を各々独立の真直な貫通孔を並設したライトガ
イド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 to fix a slit plate in correspondence with a rotating slit disk in an encoder that receives two or more optical signals without using a lens system. Then, chipped light-receiving elements are arranged corresponding to each slit of the slit plate through which each optical signal is transmitted.
This encoder is constructed by connecting each slit of a fixed slit plate and each light receiving element with a light guide in which independent straight through holes are arranged in parallel.
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１、透光部３及び遮光部４を
円周上に配したスリツト円板５、90°の位相差を
もつ光信号を得るための固定スリツト６を持つス
リツト板、チツプでなる受光素子２及びライトガ
イド９からなる。 As shown in Fig. 1, the encoder has a slit disk 5 in which a light emitting element 1 such as a light emitting diode, a light transmitting part 3, and a light shielding part 4 are arranged on the circumference, in order to obtain an optical signal with a phase difference of 90°. It consists of a slit plate having a fixed slit 6, a light receiving element 2 made of a chip, and a light guide 9.
スリツト板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個のスリツト６ａ，６ｂが
近接して開設されると共にその内周側に１個のス
リツト６ｃがスリツト円板５の回転数を読みとる
ために開設されている。 In order to obtain an optical signal with a phase difference of 90 points, the slit plate 7 has two slits 6a and 6b close to each other on the outer circumference side, and one slit 6c on the inner circumference side of the slit disk. It was established to read the rotation speed of 5.
スリツト円板５には、外周に等間隔でスリツト
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 periphery, and light-transmitting parts 3 and light-shielding parts 4 are formed alternately, and only one light-transmitting part 3b is formed on the inner periphery side.
而してスリツト円板５はサーボモータ等の回転
軸１１に取着され、該スリツト円板５の透光部
３，３ｂに対応せしめてスリツト板７が固定して
配され、これに対応してスリツト板５側に発光ダ
イオードでなる発光素子１が透光部３，３ｂに対
応して配置されている。またスリツト板７側にス
リツト板７及び発光素子１に対応してチツプでな
る受光素子２が配されている。 The slit disk 5 is attached to a rotating shaft 11 of a servo motor or the like, and the slit plate 7 is fixedly arranged in correspondence with the transparent parts 3, 3b of the slit disk 5. A light emitting element 1 made of a light emitting diode is arranged on the slit plate 5 side corresponding to the light transmitting parts 3 and 3b. Further, on the slit plate 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個の独立した真直な貫通孔
１０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、他端が固定されたスリ
ツト板７の各スリツト６に接触するように近接さ
せて対応配置されているものである。 The light guide 9 is a short cylinder having three independent straight through holes 10, one end of each through hole 10 corresponds to each light receiving element 2, and the other end corresponds to each slit 6 of a fixed slit plate 7. They are arranged in close proximity so as to be in contact with each other.
而して発光素子１から発せられ透光部３及びス
リツト６を通過する３条の光はライトガイド９の
各貫通孔１０を介してチツプでなる受光素子２に
導かれ、スリツト円板５の回転方向、回転数等を
検出するのである。 Three lines of light emitted from the light emitting element 1 and passing through the transparent part 3 and the slit 6 are guided to the light receiving element 2 made of a chip through each through hole 10 of the light guide 9, and are guided to the light receiving element 2 made of a chip. It detects the rotation direction, rotation speed, etc.
以上の如くこの発明におけるエンコーダにおい
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
れぞれ相互にクロストークすることがないから、
受光素子としてチツ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 mutually Because there is no crosstalk,
A chipped light-receiving element can be used as the light-receiving element, and the size can be reduced.
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。
1 and 2 are perspective views showing one embodiment of the present invention, and FIGS. 3 and 4 are perspective views showing conventional examples, respectively.
Claims (1)
エンコーダにおいて、回転するスリツト円板に対
応してスリツト板を固定配置し、各光信号を透過
させるスリツト板の各スリツトに対応してチツプ
化した受光素子を配し、固定されたスリツト板の
各スリツトと各受光素子間を各々独立の真直な貫
通孔を並設したライトガイドで接続して成るエン
コーダ。1. In an encoder that receives two or more optical signals without using a lens system, a slit plate is fixedly arranged in correspondence with a rotating slit disk, and a chip is formed corresponding to each slit of the slit plate through which each optical signal is transmitted. The encoder is constructed by arranging light-receiving elements, and connecting each slit of a fixed slit plate and each light-receiving element with a light guide having independent straight through-holes arranged in parallel.
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 JPS59122911A (en) | 1984-07-16 |
| JPH0457965B2 true 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5641208U (en) * | 1979-09-06 | 1981-04-16 |
-
1982
- 1982-12-28 JP JP23267282A patent/JPS59122911A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5641208U (en) * | 1979-09-06 | 1981-04-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59122911A (en) | 1984-07-16 |
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