GB2246431B - Optical encoder - Google Patents

Optical encoder

Info

Publication number
GB2246431B
GB2246431B GB9117368A GB9117368A GB2246431B GB 2246431 B GB2246431 B GB 2246431B GB 9117368 A GB9117368 A GB 9117368A GB 9117368 A GB9117368 A GB 9117368A GB 2246431 B GB2246431 B GB 2246431B
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
GB9117368A
Other versions
GB9117368D0 (en
GB2246431A (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 GB9117368A priority Critical patent/GB2246431B/en
Publication of GB9117368D0 publication Critical patent/GB9117368D0/en
Publication of GB2246431A publication Critical patent/GB2246431A/en
Application granted granted Critical
Publication of GB2246431B publication Critical patent/GB2246431B/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)
GB9117368A 1988-01-22 1991-08-12 Optical encoder Expired - Fee Related GB2246431B (en)

Priority Applications (1)

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

Publications (3)

Publication Number Publication Date
GB9117368D0 GB9117368D0 (en) 1991-09-25
GB2246431A GB2246431A (en) 1992-01-29
GB2246431B true GB2246431B (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 Before (1)

Application Number Title Priority Date Filing Date
GB9117366A Expired - Fee Related GB2246430B (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
ATE159811T1 (en) * 1993-07-17 1997-11-15 Heidenhain Gmbh Dr Johannes LENGTH OR ANGLE MEASURING DEVICE
AU2002329728A1 (en) * 2001-08-30 2003-03-18 Microe Systems Corporation Reference point talbot encoder
US7002137B2 (en) 2001-08-30 2006-02-21 Gsi Lumonics Corporation Reference point talbot encoder

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3417176C2 (en) * 1984-05-09 1986-07-31 Dr. Johannes Heidenhain Gmbh, 8225 Traunreut Photoelectric measuring device
GB8413955D0 (en) * 1984-05-31 1984-07-04 Pa Consulting Services Displacement measuring apparatus
DE3541199C1 (en) * 1985-11-21 1987-06-25 Heidenhain Gmbh Dr Johannes Photoelectric position measuring device

Also Published As

Publication number Publication date
GB9117368D0 (en) 1991-09-25
GB2246430B (en) 1992-05-13
GB9117366D0 (en) 1991-09-25
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