JPS6166926A - ロ−タリ−エンコ−ダ− - Google Patents

ロ−タリ−エンコ−ダ−

Info

Publication number
JPS6166926A
JPS6166926A JP18915484A JP18915484A JPS6166926A JP S6166926 A JPS6166926 A JP S6166926A JP 18915484 A JP18915484 A JP 18915484A JP 18915484 A JP18915484 A JP 18915484A JP S6166926 A JPS6166926 A JP S6166926A
Authority
JP
Japan
Prior art keywords
light
radiation grating
grating
radiation
rotating object
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
JP18915484A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0462003B2 (enrdf_load_stackoverflow
Inventor
Tetsuji Nishimura
西村　哲治
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP18915484A priority Critical patent/JPS6166926A/ja
Publication of JPS6166926A publication Critical patent/JPS6166926A/ja
Priority to US07/481,684 priority patent/US4967072A/en
Publication of JPH0462003B2 publication Critical patent/JPH0462003B2/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/02—Indicating direction only, e.g. by weather vane
    • G01P13/04—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
    • G01P13/045—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement with speed indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
    • G01P3/366—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light by using diffraction of light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Optical Transform (AREA)
JP18915484A 1984-09-05 1984-09-10 ロ−タリ−エンコ−ダ− Granted JPS6166926A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP18915484A JPS6166926A (ja) 1984-09-10 1984-09-10 ロ−タリ−エンコ−ダ−
US07/481,684 US4967072A (en) 1984-09-05 1990-02-20 Interferometric rotating condition detection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18915484A JPS6166926A (ja) 1984-09-10 1984-09-10 ロ−タリ−エンコ−ダ−

Publications (2)

Publication Number Publication Date
JPS6166926A true JPS6166926A (ja) 1986-04-05
JPH0462003B2 JPH0462003B2 (enrdf_load_stackoverflow) 1992-10-02

Family

ID=16236340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18915484A Granted JPS6166926A (ja) 1984-09-05 1984-09-10 ロ−タリ−エンコ−ダ−

Country Status (1)

Country Link
JP (1) JPS6166926A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02147816A (ja) * 1988-11-29 1990-06-06 Tokyo Seimitsu Co Ltd スケール読取装置
EP0652487A1 (en) 1993-10-29 1995-05-10 Canon Kabushiki Kaisha Rotational deviation detecting method and system using a periodic pattern
US5442172A (en) * 1994-05-27 1995-08-15 International Business Machines Corporation Wavefront reconstruction optics for use in a disk drive position measurement system
US5909333A (en) * 1994-05-27 1999-06-01 International Business Machines Corporation Servo-writing system for use in a data recording disk drive
JP2005227077A (ja) * 2004-02-12 2005-08-25 Sharp Corp 光学式移動情報検出装置および移動情報検出システムおよび電子機器およびエンコーダ

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02147816A (ja) * 1988-11-29 1990-06-06 Tokyo Seimitsu Co Ltd スケール読取装置
EP0652487A1 (en) 1993-10-29 1995-05-10 Canon Kabushiki Kaisha Rotational deviation detecting method and system using a periodic pattern
US5550635A (en) * 1993-10-29 1996-08-27 Canon Kabushiki Kaisha Rotational deviation detecting method and system using a periodic pattern
US5442172A (en) * 1994-05-27 1995-08-15 International Business Machines Corporation Wavefront reconstruction optics for use in a disk drive position measurement system
US5909333A (en) * 1994-05-27 1999-06-01 International Business Machines Corporation Servo-writing system for use in a data recording disk drive
JP2005227077A (ja) * 2004-02-12 2005-08-25 Sharp Corp 光学式移動情報検出装置および移動情報検出システムおよび電子機器およびエンコーダ

Also Published As

Publication number Publication date
JPH0462003B2 (enrdf_load_stackoverflow) 1992-10-02

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term