JPS61195309A - Photoelectric converting device - Google Patents

Photoelectric converting device

Info

Publication number
JPS61195309A
JPS61195309A JP3706185A JP3706185A JPS61195309A JP S61195309 A JPS61195309 A JP S61195309A JP 3706185 A JP3706185 A JP 3706185A JP 3706185 A JP3706185 A JP 3706185A JP S61195309 A JPS61195309 A JP S61195309A
Authority
JP
Japan
Prior art keywords
light
elements
light receiving
receiving elements
wavelength range
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
Application number
JP3706185A
Other languages
Japanese (ja)
Inventor
Tatsuya Tamura
田村　達弥
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.)
Seikosha KK
Original Assignee
Seikosha KK
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 Seikosha KK filed Critical Seikosha KK
Priority to JP3706185A priority Critical patent/JPS61195309A/en
Publication of JPS61195309A publication Critical patent/JPS61195309A/en
Pending 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Optical Transform (AREA)

Abstract

PURPOSE:To place the light receiving elements adjacent to one another to minimize the device size by using constitution in which the neighboring light receiving elements different in wavelength range and light emitting elements opposite thereto by the intermediary of through-holes emit light within the effective wavelength range. CONSTITUTION:The light receiving elements P1-P4 and the light emitting element L1-L4 are mounted opposite to one another by the intermediary of through-holes h of a rotating plate A on which the 4-bit code is formed. The elements P1 and P3 and the elements P2 and P4 have different wavelength ranges so that the elements L emit light within the effective wavelength range of the opposing light receiving elements P. The light from the light emitting element L1 arriving at the light receiving element P2 is not sensed by the element P2. The same applies to the remaining elements. Hence, the light from adjacent light emitting elements accidentally arriving at the neighboring elements do not affect the function so that the respective light receiving elements can be mounted adjacent to one another to minimize the size of the overall device.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は光電変換装置に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to a photoelectric conversion device.

［従来の技術］ 例えば、フォトカプラを用いたロータリイエンコーダで
は、円板に４ピツトのコードを表す透孔を形成し、この
円板を挟んで４組の発光素子および受光素子を対向させ
て、コードを読み取っている。[Prior art] For example, in a rotary encoder using a photocoupler, a through hole representing a 4-pit code is formed in a disc, and four sets of light emitting elements and light receiving elements are placed facing each other with the disc in between. , reading the code.

［発明が解決しようとする問題点］ 上記のものでは、透孔からの光の回り込みがあるため、
各ビット間の間隔をあまり縮めることができず、小型化
が難しかった。しかも、発光素子および受光素子には指
向性の強いものが要求され、光軸合わせにも高精度が要
求されるものであった。[Problems to be solved by the invention] In the above, since light wraps around from the through hole,
The interval between each bit could not be reduced much, making it difficult to miniaturize. Moreover, the light-emitting element and the light-receiving element are required to have strong directivity, and high precision is also required for optical axis alignment.

本発明は、隣接する発光素子からの光の回り込みによる
影響を排除して小型化を可能にしたものである。The present invention makes it possible to reduce the size of the device by eliminating the influence of light coming from adjacent light emitting elements.

［問題点を解決するための手段］ 本発明は、隣り合った受光素子は互いに有効波長域を異
にし、発光素子は；対向する受光素子の有効波長域の光
を発するようにしたものである。[Means for Solving the Problems] In the present invention, adjacent light-receiving elements have different effective wavelength ranges from each other, and the light-emitting element emits light in the effective wavelength range of the opposing light-receiving element. .

［実施例］ 第１図において、Ａは透孔り、ｈによって４ビツトのコ
ードを形成した回転板、Ｐ１〜Ｐ４はフォトダイオード
等の受光素子で、隣り合う受光素子は互いに有効波長域
が異なるものを配設しである。つまり、受光素子Ｐ１．
Ｐ３は第２図の曲線ｐｌで示される有効波長域を有し、
受光素子Ｐ２　。[Example] In Fig. 1, A is a rotary plate with a transparent hole and a 4-bit code formed by h, P1 to P4 are light receiving elements such as photodiodes, and adjacent light receiving elements have different effective wavelength ranges. Things are arranged. In other words, the light receiving element P1.
P3 has an effective wavelength range shown by curve pl in FIG.
Light receiving element P2.

Ｐ４は曲線β２で示される有効波長域を有している。P4 has an effective wavelength range shown by curve β2.

また各受光素子Ｐ１〜Ｐ４には、回転板Ａを挟んで発光
素子し、〜し４を対向させてあり、発光素子Ｌ１．Ｌ３
は受光素子Ｐ１．Ｐ３の有効波長域内の光を発し、発光
素子Ｌ２．Ｌ４は受光素子Ｐ２　、Ｐ４の有効波長域内
の光を発するものである。Further, each of the light receiving elements P1 to P4 is provided with a light emitting element L1. L3
is light receiving element P1. P3 emits light within the effective wavelength range of light emitting elements L2. L4 emits light within the effective wavelength range of the light receiving elements P2 and P4.

以上のような構成のため、発光素子Ｌ１からの光が受光
素子Ｐ　に回り込んでも、受光素子Ｐ２はこれに感応し
ない。また、発光素子Ｌ３からの光が受光素子Ｐ２　、
Ｐ４に回り込んでも、何ら悪影響を与えない。Due to the above configuration, even if light from the light emitting element L1 goes around to the light receiving element P, the light receiving element P2 does not respond to this. Further, the light from the light emitting element L3 is transmitted to the light receiving element P2,
Even if it goes around to P4, it will not have any adverse effect.

同様に、発光素子Ｌ２．Ｌ４からの光が受光素子Ｐ１．
Ｐ３に回り込んでも感応しない。Similarly, light emitting element L2. The light from L4 is transmitted to light receiving element P1.
Even if it goes around to P3, it doesn't respond.

したがって、各受光素子を近接して、または接して配設
することができ、小型化が可能となる。Therefore, each light-receiving element can be disposed close to each other or in contact with each other, making it possible to reduce the size.

［効果］ 本発明によれば、隣りあった受光素子は互いに有効波長
域を異にし、各発光素子は、対向する受光素子の有効波
長域内の光を発するようにしたので、隣接する発光素子
からの光が回り込んでもこれによる影響を受けず、各受
光素子を近接してまたは接して配設することができ、構
成を小型化することができる。[Effect] According to the present invention, adjacent light-receiving elements have different effective wavelength ranges, and each light-emitting element emits light within the effective wavelength range of the opposing light-receiving element. Even if the light of the light goes around, the light receiving elements are not affected by this, and the light receiving elements can be arranged close to each other or in contact with each other, and the structure can be miniaturized.

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

第１図は本発明の一実施例を示した説明図、第２図は受
光素子の有効波長域を示した特性図である。 Ｐ１〜Ｐ４・・・受光素子、 Ｌ１〜Ｌ４・・・発光素子、 ｈ、ｈ・・・透明孔。 以上FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and FIG. 2 is a characteristic diagram showing an effective wavelength range of a light receiving element. P1 to P4... Light receiving element, L1 to L4... Light emitting element, h, h... Transparent hole. that's all

Claims (1)

【特許請求の範囲】[Claims] 並設した複数の受光素子と、透孔を介して上記各受光素
子に対向して設けた発光素子とからなり、隣り合った受
光素子は互いに有効波長域を異にし、上記各発光素子は
、対向する受光素子の有効波長域内の光を発するもので
あることを特徴とする光電変換装置。Consisting of a plurality of light-receiving elements arranged in parallel and a light-emitting element provided opposite each of the light-receiving elements through a through hole, adjacent light-receiving elements have different effective wavelength ranges from each other, and each of the light-emitting elements A photoelectric conversion device characterized in that it emits light within the effective wavelength range of opposing light receiving elements.
JP3706185A 1985-02-26 1985-02-26 Photoelectric converting device Pending JPS61195309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3706185A JPS61195309A (en) 1985-02-26 1985-02-26 Photoelectric converting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3706185A JPS61195309A (en) 1985-02-26 1985-02-26 Photoelectric converting device

Publications (1)

Publication Number Publication Date
JPS61195309A true JPS61195309A (en) 1986-08-29

Family

ID=12487041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3706185A Pending JPS61195309A (en) 1985-02-26 1985-02-26 Photoelectric converting device

Country Status (1)

Country Link
JP (1) JPS61195309A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59202022A (en) * 1983-04-30 1984-11-15 Matsushita Electric Works Ltd Optical encoder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59202022A (en) * 1983-04-30 1984-11-15 Matsushita Electric Works Ltd Optical encoder

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