JPS6184520A - Optical rotary encoder - Google Patents
Optical rotary encoderInfo
- Publication number
- JPS6184520A JPS6184520A JP20614884A JP20614884A JPS6184520A JP S6184520 A JPS6184520 A JP S6184520A JP 20614884 A JP20614884 A JP 20614884A JP 20614884 A JP20614884 A JP 20614884A JP S6184520 A JPS6184520 A JP S6184520A
- Authority
- JP
- Japan
- Prior art keywords
- light
- rotary plate
- optical
- reflected
- rotary
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 25
- 239000004065 semiconductor Substances 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 abstract description 2
- 239000013307 optical fiber Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
不発明は、光学式ロータリエンコーダに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The industrial application field of the invention relates to optical rotary encoders.
従来技術
第３図に示す工うに、光源となる発光ダイオードＩとス
リット２を有するスリット板３と回転方向に多数のスリ
ット４を有する回転板５とフォトダイオード６とを備え
、フォトダイオード６の受光する回数（ＯＮ 、 ＯＦ
Ｆする回数）で回転角を検出する光学式ロータリエンコ
ーダ。The prior art device shown in FIG. 3 includes a light emitting diode I serving as a light source, a slit plate 3 having slits 2, a rotary plate 5 having a large number of slits 4 in the rotational direction, and a photodiode 6. number of times (ON, OF
Optical rotary encoder that detects the rotation angle by the number of times
発明が解決し二うとする間頌点
回転板５の両側に発光ダイオード１とフォトダイオード
６とを配設したので、光源側の光学系と受光側の光学系
とが別々となシ、全体が複雑で大型化する。The problem solved by the invention is that the light emitting diode 1 and the photodiode 6 are arranged on both sides of the rotary plate 5, so that the optical system on the light source side and the optical system on the light receiving side are separate, and the whole Become complex and large.
回転板５のスリット４の間隔で検出精度が決定されると
共に、通常の大きさの回転板５には数十μｍ間隔でスリ
ット４を設けることが限界であシ、高精度とするには回
転板５の外径を大きくしなければならず、装置全体が大
型化して［７まう。Detection accuracy is determined by the spacing between the slits 4 on the rotary plate 5, and the limit is to provide the slits 4 at intervals of several tens of μm on a normal-sized rotary plate 5. The outer diameter of the plate 5 must be increased, making the entire device larger.
問題点を解決するための手段及び作用
光ディスクより成る回転板と対向し、て光ふと光検出器
とを、その光学系の一部が共用するように配設シフ、高
精度の光学式ロータリエンコーダを小型・＠量化できる
ようにしたもの。Means for Solving the Problems and Effects A high-precision optical rotary encoder is arranged opposite to a rotary plate consisting of an optical disk, and has a light beam and a photodetector so that a part of its optical system is shared. can be made small and quantifiable.
実施例
軸ＩＯには回転板１１が設けられ、この回転板１１はア
クリル樹脂などの透明基板１２上に反射率を異ならせる
ためのピット１３を形成し、その裏面に氾膜１４と保護
膜１５を設けたものであって光ディスクとなっている。Embodiment The rotary plate 11 is provided on the axis IO, and this rotary plate 11 has pits 13 formed on a transparent substrate 12 such as acrylic resin to vary the reflectance, and a flood film 14 and a protective film 15 on the back surface thereof. It is an optical disc.
１６は光源となる半導体レーザであり、その出力光はビ
ームスプリッタ１７を通過後絞シ込みレンズ１８に＝り
集束され前記回転板１１上に照射されて反射される。Reference numeral 16 denotes a semiconductor laser serving as a light source, and its output light passes through a beam splitter 17, is focused by an aperture lens 18, and is irradiated onto the rotary plate 11, where it is reflected.
この反射光は絞り込みＶンズ１８を透過後ビームスプリ
ッタＩ７にニジ反射されて光検出器１９に到達し、この
光検出器１９に二って光強度変化として検出される。This reflected light passes through the aperture V lens 18, is reflected by the beam splitter I7, reaches the photodetector 19, and is detected by the photodetector 19 as a change in light intensity.
この様であるから、光検出器１９に工っで検出した反射
光の光ｇｉ度変化の回数に１って前記ビット＋３の数や
形状を仰ることができ、それに、Ｃ′：・て軸１０の回
転角を検出できる。Since this is the case, the number and shape of the bits + 3 can be determined by multiplying the number of changes in the optical gi of the reflected light detected by the photodetector 19, and also the number and shape of the bits +3. 10 rotation angles can be detected.
また、光源側の光学系の一部と受光側の光学系の一部と
を共用することができるから、小型化できる。Further, since a part of the optical system on the light source side and a part of the optical system on the light receiving side can be shared, the size can be reduced.
また、回転板として光ディスクを用いてから回転板上の
スリット間隔（ビット間隔）を従来の回転板のスリット
間隔よりも狭くでき、回転板の外径を大きくせずに高精
度とすることができる。Furthermore, since an optical disk is used as the rotary plate, the slit spacing (bit spacing) on the rotary plate can be narrower than the slit spacing of conventional rotary plates, and high precision can be achieved without increasing the outer diameter of the rotary plate. .
なお、第２図に示すように半導体レーザ１６と対向Ｌ７
て光ファイバ２０を設け、その先端部にはセルフオフレ
ンズ２１を設けて回転板１１のビット１３と対向させる
と共に、光ファイバ２ｏの途中に光７アイパカツプラ２
２を介して光ファイバ２３を設け、この光ファイバ２３
と対向して光検出器１９を設けても良い。In addition, as shown in FIG. 2, the semiconductor laser 16 and the opposing L7
A self-off lens 21 is provided at the tip of the optical fiber 20 to face the bit 13 of the rotary plate 11, and an optical 7 eyepak coupler 2 is provided in the middle of the optical fiber 2o.
2, an optical fiber 23 is provided through the optical fiber 23.
A photodetector 19 may be provided opposite to.
発明の効果
光源側の光学系と受光側の光学系とを一部共用したから
小型化できると共に、回転板を光ディスクとしたから外
径を大きくせずに高精度とすることができ、高精度の光
学式ロータリエンコーダを小型・軽量化できる。Effects of the invention Since the optical system on the light source side and the optical system on the light receiving side are partially shared, it is possible to reduce the size, and since the rotating plate is an optical disk, high precision can be achieved without increasing the outer diameter, resulting in high precision. The optical rotary encoder can be made smaller and lighter.
第１必、第２図は本発明の異なる実施例を示す構成説ａ
Ａ図、第３図は従来例の説明スである。
１１は回転板、１６は光源。Figure 1 and Figure 2 are configuration diagrams showing different embodiments of the present invention.
FIG. A and FIG. 3 are illustrations of conventional examples. 11 is a rotating plate, and 16 is a light source.
Claims (1)
検出器１９とを、その光学系の一部が共用するように配
設したことを特徴とする光学式ロータリエンコーダ。An optical rotary encoder characterized in that a light source 16 and a photodetector 19 are disposed facing a rotary plate 11 made of an optical disk so that a part of the optical system is shared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20614884A JPS6184520A (en) | 1984-10-03 | 1984-10-03 | Optical rotary encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20614884A JPS6184520A (en) | 1984-10-03 | 1984-10-03 | Optical rotary encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6184520A true JPS6184520A (en) | 1986-04-30 |
Family
ID=16518584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20614884A Pending JPS6184520A (en) | 1984-10-03 | 1984-10-03 | Optical rotary encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6184520A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6459011A (en) * | 1987-08-28 | 1989-03-06 | Sony Corp | Optical encoder |
-
1984
- 1984-10-03 JP JP20614884A patent/JPS6184520A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6459011A (en) * | 1987-08-28 | 1989-03-06 | Sony Corp | Optical encoder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4746792A (en) | Optical transducer element and displacement meter comprising such an element | |
| EP0244827A2 (en) | Improved optical head | |
| JPH06194144A (en) | Rotational information detecting device | |
| JPH063167A (en) | Encoder | |
| US4160269A (en) | Apparatus for optically reading a phase-modulated optical record carrier | |
| JPH073343B2 (en) | Reflective optical encoder device | |
| US5182444A (en) | Split lens displaced long from each other along plane of cut | |
| US6100519A (en) | Photo-detector based calculating means having a grating wheel with integrated lenses | |
| JPS6184520A (en) | Optical rotary encoder | |
| US3815977A (en) | Photo-detector | |
| JP2540113B2 (en) | Encoder | |
| JP2639659B2 (en) | Light head | |
| JPS6378021A (en) | Optical rotary encoder | |
| JPS63153425A (en) | Rotational quantity detecting device | |
| JPH0517528B2 (en) | ||
| JP2527728B2 (en) | Optical encoder | |
| JPH045142B2 (en) | ||
| JPH06242015A (en) | Microparticle detection system | |
| JPS61233441A (en) | Optical head device | |
| JPH08247792A (en) | Rotary encoder | |
| RU1768967C (en) | Surface roughness tester | |
| JPH02112723A (en) | Optical encoder | |
| JPS6336111A (en) | Optical encoder | |
| JPH0318720A (en) | Displacement measuring instrument | |
| JPS6271865A (en) | Encoder |