GB2246430B - Optical encoder - Google Patents

Optical encoder

Info

Publication number
GB2246430B
GB2246430B GB9117366A GB9117366A GB2246430B GB 2246430 B GB2246430 B GB 2246430B GB 9117366 A GB9117366 A GB 9117366A GB 9117366 A GB9117366 A GB 9117366A GB 2246430 B GB2246430 B GB 2246430B
Authority
GB
United Kingdom
Prior art keywords
optical encoder
encoder
optical
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.)
Expired - Fee Related
Application number
GB9117366A
Other versions
GB9117366D0 (en
GB2246430A (en
Inventor
Souji Ichikawa
Hideka Oka
Naoyoshi Terao
Seiji Sakagami
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.)
Mitutoyo Corp
Original Assignee
Mitutoyo Corp
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
Priority claimed from JP63012143A external-priority patent/JPH0638048B2/en
Priority claimed from JP4262688A external-priority patent/JPH01216213A/en
Priority claimed from GB8901266A external-priority patent/GB2216650B/en
Application filed by Mitutoyo Corp filed Critical Mitutoyo Corp
Priority to GB9117366A priority Critical patent/GB2246430B/en
Publication of GB9117366D0 publication Critical patent/GB9117366D0/en
Publication of GB2246430A publication Critical patent/GB2246430A/en
Application granted granted Critical
Publication of GB2246430B publication Critical patent/GB2246430B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
GB9117366A 1988-01-22 1991-08-12 Optical encoder Expired - Fee Related GB2246430B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9117366A GB2246430B (en) 1988-01-22 1991-08-12 Optical encoder

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP63012143A JPH0638048B2 (en) 1988-01-22 1988-01-22 Reflective encoder
JP4262688A JPH01216213A (en) 1988-02-25 1988-02-25 Optical displacement detector
GB8901266A GB2216650B (en) 1988-01-22 1989-01-20 Optical encoder
GB9117366A GB2246430B (en) 1988-01-22 1991-08-12 Optical encoder

Publications (3)

Publication Number Publication Date
GB9117366D0 GB9117366D0 (en) 1991-09-25
GB2246430A GB2246430A (en) 1992-01-29
GB2246430B true GB2246430B (en) 1992-05-13

Family

ID=27264279

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9117366A Expired - Fee Related GB2246430B (en) 1988-01-22 1991-08-12 Optical encoder
GB9117368A Expired - Fee Related GB2246431B (en) 1988-01-22 1991-08-12 Optical encoder

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB9117368A Expired - Fee Related GB2246431B (en) 1988-01-22 1991-08-12 Optical encoder

Country Status (1)

Country Link
GB (2) GB2246430B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0719965A (en) * 1993-06-30 1995-01-20 Ando Electric Co Ltd Light wavemeter
EP0635701B1 (en) * 1993-07-17 1997-10-29 Dr. Johannes Heidenhain GmbH Length or angle measuring device
US7002137B2 (en) 2001-08-30 2006-02-21 Gsi Lumonics Corporation Reference point talbot encoder
EP1421343A2 (en) * 2001-08-30 2004-05-26 MicroE Systems Corporation Reference point talbot encoder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0163362A1 (en) * 1984-05-31 1985-12-04 Dr. Johannes Heidenhain GmbH Displacement measuring apparatus and method
EP0163824A2 (en) * 1984-05-09 1985-12-11 Dr. Johannes Heidenhain GmbH Photoelectric measuring device
EP0223009A2 (en) * 1985-11-21 1987-05-27 Dr. Johannes Heidenhain GmbH Opto-electronic position determination device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0163824A2 (en) * 1984-05-09 1985-12-11 Dr. Johannes Heidenhain GmbH Photoelectric measuring device
EP0163362A1 (en) * 1984-05-31 1985-12-04 Dr. Johannes Heidenhain GmbH Displacement measuring apparatus and method
EP0223009A2 (en) * 1985-11-21 1987-05-27 Dr. Johannes Heidenhain GmbH Opto-electronic position determination device

Also Published As

Publication number Publication date
GB9117368D0 (en) 1991-09-25
GB9117366D0 (en) 1991-09-25
GB2246431B (en) 1992-05-13
GB2246431A (en) 1992-01-29
GB2246430A (en) 1992-01-29

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980120