JPS57169613A - Photoelectric encoder - Google Patents

Photoelectric encoder

Info

Publication number
JPS57169613A
JPS57169613A JP56055406A JP5540681A JPS57169613A JP S57169613 A JPS57169613 A JP S57169613A JP 56055406 A JP56055406 A JP 56055406A JP 5540681 A JP5540681 A JP 5540681A JP S57169613 A JPS57169613 A JP S57169613A
Authority
JP
Japan
Prior art keywords
grating
light source
moving
movable
source devices
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
JP56055406A
Other languages
Japanese (ja)
Other versions
JPH0128887B2 (en
Inventor
Takashi Yokokura
Fumitomo Kondo
Tsuneo Sasaki
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.)
TOUKIYOU KOUGAKU KIKAI KK
Tokyo Optical Co Ltd
Original Assignee
TOUKIYOU KOUGAKU KIKAI KK
Tokyo Optical Co 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 TOUKIYOU KOUGAKU KIKAI KK, Tokyo Optical Co Ltd filed Critical TOUKIYOU KOUGAKU KIKAI KK
Priority to JP56055406A priority Critical patent/JPS57169613A/en
Publication of JPS57169613A publication Critical patent/JPS57169613A/en
Publication of JPH0128887B2 publication Critical patent/JPH0128887B2/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

Abstract

PURPOSE:To eliminate a phase error of a segment pattern by providing a moving means for moving the optical axes of light source devices, and an interval adjusting means for adjusting intervals between the light sources of the light source devices and condensers. CONSTITUTION:A movable grating 1 having grating pitch P moves as a moving body moves. A fixed grating 2 has the same grating pitch P with the movable grating 1, and consists of at least four segments 21-24 arrayed so that their relative positions have a period nearly 1/8 as great as the grating pitch P in the movement direction of the movable grating 1. Two light source devices 3 and 3' are provided with means for adjusting intervals between their light sources 4 and 4', and condenser lenses 5 and 5', thereby eliminating phase errors included in patterns between the left and right segments 21 and 22, and between 23 and 24. Further a means for moving the optical axis of the light source 3' in parallel to the movement direction of the movable grating 1 is provided to eliminate a phase error between two grating patterns consisting of those segments 21, 22 and 23, 24.
JP56055406A 1981-04-13 1981-04-13 Photoelectric encoder Granted JPS57169613A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56055406A JPS57169613A (en) 1981-04-13 1981-04-13 Photoelectric encoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56055406A JPS57169613A (en) 1981-04-13 1981-04-13 Photoelectric encoder

Publications (2)

Publication Number Publication Date
JPS57169613A true JPS57169613A (en) 1982-10-19
JPH0128887B2 JPH0128887B2 (en) 1989-06-06

Family

ID=12997654

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56055406A Granted JPS57169613A (en) 1981-04-13 1981-04-13 Photoelectric encoder

Country Status (1)

Country Link
JP (1) JPS57169613A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602436A (en) * 1984-03-31 1986-07-29 Dr. Johannes Heidenhain Gmbh Position measuring system
WO1987003084A1 (en) * 1985-11-14 1987-05-21 Acu-Rite Incorporated Phase controlled incremental distance measuring system
JPS62274217A (en) * 1986-05-14 1987-11-28 ドクトル・ヨハネス・ハイデンハイン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング Photoelectric measuring device
EP0509979A2 (en) * 1991-04-18 1992-10-21 RSF-Elektronik Gesellschaft m.b.H. Photo-electronic position-measuring device
EP0608209A2 (en) * 1993-01-21 1994-07-27 RSF-Elektronik Gesellschaft m.b.H. Photo-electrical position measuring device
CN108571992A (en) * 2017-03-09 2018-09-25 曾吉旺 Optical scanner formula double layer light-guiding encoder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5636014A (en) * 1979-08-31 1981-04-09 Tokyo Seimitsu Co Ltd Detection method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5636014A (en) * 1979-08-31 1981-04-09 Tokyo Seimitsu Co Ltd Detection method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602436A (en) * 1984-03-31 1986-07-29 Dr. Johannes Heidenhain Gmbh Position measuring system
WO1987003084A1 (en) * 1985-11-14 1987-05-21 Acu-Rite Incorporated Phase controlled incremental distance measuring system
JPS62274217A (en) * 1986-05-14 1987-11-28 ドクトル・ヨハネス・ハイデンハイン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング Photoelectric measuring device
JPH0663783B2 (en) * 1986-05-14 1994-08-22 ドクトル・ヨハネス・ハイデンハイン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング Photoelectric measuring device
EP0509979A2 (en) * 1991-04-18 1992-10-21 RSF-Elektronik Gesellschaft m.b.H. Photo-electronic position-measuring device
EP0608209A2 (en) * 1993-01-21 1994-07-27 RSF-Elektronik Gesellschaft m.b.H. Photo-electrical position measuring device
EP0608209A3 (en) * 1993-01-21 1994-09-07 Rsf Elektronik Gmbh Photo-electrical position measuring device.
CN108571992A (en) * 2017-03-09 2018-09-25 曾吉旺 Optical scanner formula double layer light-guiding encoder
CN108571992B (en) * 2017-03-09 2020-04-21 曾吉旺 Optical scanning type double-layer light guide encoder

Also Published As

Publication number Publication date
JPH0128887B2 (en) 1989-06-06

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