JPS57190202A - Device for reading optical scale - Google Patents

Device for reading optical scale

Info

Publication number
JPS57190202A
JPS57190202A JP56075581A JP7558181A JPS57190202A JP S57190202 A JPS57190202 A JP S57190202A JP 56075581 A JP56075581 A JP 56075581A JP 7558181 A JP7558181 A JP 7558181A JP S57190202 A JPS57190202 A JP S57190202A
Authority
JP
Japan
Prior art keywords
lens
scale
light
inputted
moving distance
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
JP56075581A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6126005B2 (enrdf_load_stackoverflow
Inventor
Hideto Iwaoka
Koji Akiyama
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
Yokogawa Hokushin Electric Corp
Yokogawa 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 Yokogawa Electric Corp, Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Corp
Priority to JP56075581A priority Critical patent/JPS57190202A/ja
Publication of JPS57190202A publication Critical patent/JPS57190202A/ja
Publication of JPS6126005B2 publication Critical patent/JPS6126005B2/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
    • G01D5/36—Forming the light into pulses
    • G01D5/38—Forming the light into pulses by diffraction gratings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)
  • Instruments For Measurement Of Length By Optical Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
JP56075581A 1981-05-19 1981-05-19 Device for reading optical scale Granted JPS57190202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56075581A JPS57190202A (en) 1981-05-19 1981-05-19 Device for reading optical scale

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56075581A JPS57190202A (en) 1981-05-19 1981-05-19 Device for reading optical scale

Publications (2)

Publication Number Publication Date
JPS57190202A true JPS57190202A (en) 1982-11-22
JPS6126005B2 JPS6126005B2 (enrdf_load_stackoverflow) 1986-06-18

Family

ID=13580296

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56075581A Granted JPS57190202A (en) 1981-05-19 1981-05-19 Device for reading optical scale

Country Status (1)

Country Link
JP (1) JPS57190202A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3700906A1 (de) * 1986-01-14 1987-07-16 Canon Kk Verschluessler
US4868385A (en) * 1985-07-10 1989-09-19 Canon Kabushiki Kaisha Rotating state detection apparatus using a plurality of light beams
US4967072A (en) * 1984-09-05 1990-10-30 Canon Kabushiki Kaisha Interferometric rotating condition detection apparatus
JP2014035216A (ja) * 2012-08-07 2014-02-24 Fujitsu Ltd 光学式ロータリーエンコーダ及びその補正方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4967072A (en) * 1984-09-05 1990-10-30 Canon Kabushiki Kaisha Interferometric rotating condition detection apparatus
US4868385A (en) * 1985-07-10 1989-09-19 Canon Kabushiki Kaisha Rotating state detection apparatus using a plurality of light beams
DE3700906A1 (de) * 1986-01-14 1987-07-16 Canon Kk Verschluessler
JP2014035216A (ja) * 2012-08-07 2014-02-24 Fujitsu Ltd 光学式ロータリーエンコーダ及びその補正方法

Also Published As

Publication number Publication date
JPS6126005B2 (enrdf_load_stackoverflow) 1986-06-18

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