GB9109425D0 - Photoelectric encoder - Google Patents

Photoelectric encoder

Info

Publication number
GB9109425D0
GB9109425D0 GB919109425A GB9109425A GB9109425D0 GB 9109425 D0 GB9109425 D0 GB 9109425D0 GB 919109425 A GB919109425 A GB 919109425A GB 9109425 A GB9109425 A GB 9109425A GB 9109425 D0 GB9109425 D0 GB 9109425D0
Authority
GB
United Kingdom
Prior art keywords
photoelectric encoder
photoelectric
encoder
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
GB919109425A
Other versions
GB2243684A (en
GB2243684B (en
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
Application filed by Mitutoyo Corp filed Critical Mitutoyo Corp
Publication of GB9109425D0 publication Critical patent/GB9109425D0/en
Publication of GB2243684A publication Critical patent/GB2243684A/en
Application granted granted Critical
Publication of GB2243684B publication Critical patent/GB2243684B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
GB9109425A 1989-09-05 1991-05-01 Photoelectric encoder Expired - Lifetime GB2243684B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1230906A JPH0656304B2 (en) 1989-09-05 1989-09-05 Photoelectric encoder
PCT/JP1990/001138 WO1991003711A1 (en) 1989-09-05 1990-09-05 Photoelectric encoder

Publications (3)

Publication Number Publication Date
GB9109425D0 true GB9109425D0 (en) 1991-06-26
GB2243684A GB2243684A (en) 1991-11-06
GB2243684B GB2243684B (en) 1993-07-07

Family

ID=16915147

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9109425A Expired - Lifetime GB2243684B (en) 1989-09-05 1991-05-01 Photoelectric encoder

Country Status (4)

Country Link
JP (1) JPH0656304B2 (en)
DE (1) DE4091517C2 (en)
GB (1) GB2243684B (en)
WO (1) WO1991003711A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6291839B1 (en) 1998-09-11 2001-09-18 Lulileds Lighting, U.S. Llc Light emitting device having a finely-patterned reflective contact
DE19859670A1 (en) 1998-12-23 2000-06-29 Heidenhain Gmbh Dr Johannes Readhead and method of making same
DE19917950A1 (en) 1999-04-21 2000-10-26 Heidenhain Gmbh Dr Johannes Integrated optoelectronic thin film sensor, useful for scale scanning in a length, angle or two-dimensional measuring system, has a semiconductor layer of thickness corresponding to that of the detecting region of photodetectors
JP2002236034A (en) * 2000-12-07 2002-08-23 Harmonic Drive Syst Ind Co Ltd Optical encoder
JP4880132B2 (en) * 2001-05-11 2012-02-22 株式会社ミツトヨ Photoelectric encoder
DE602005002287T2 (en) 2004-03-17 2008-05-29 Canon K.K. Optical encoder
JP4498024B2 (en) 2004-06-15 2010-07-07 キヤノン株式会社 Optical encoder

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019196A (en) * 1974-11-22 1977-04-19 Stanley Electric Co., Ltd. Indicating element and method of manufacturing same
JPS6032126B2 (en) * 1981-06-01 1985-07-26 株式会社 三豊製作所 Photoelectric encoder
US4499374A (en) * 1981-06-01 1985-02-12 Mitutoyo Mfg. Co., Ltd. Photoelectrical encoder employing an optical grating
JPS58147654A (en) * 1982-02-26 1983-09-02 Matsushita Electric Ind Co Ltd Optical type frequency generator
JPS59221667A (en) * 1983-05-31 1984-12-13 Matsushita Electric Ind Co Ltd Optical rotation detector
JPS61283818A (en) * 1985-06-10 1986-12-13 Sharp Corp Photoelectric type rotary encoder
JPS6324126A (en) * 1986-06-25 1988-02-01 Mitsutoyo Corp Photoelectric encoder
US4943716A (en) * 1988-01-22 1990-07-24 Mitutoyo Corporation Diffraction-type optical encoder with improved detection signal insensitivity to optical grating gap variations
JPH06324126A (en) * 1993-05-10 1994-11-25 Fujisaki Densetsu Kk Protective relay testing device

Also Published As

Publication number Publication date
DE4091517C2 (en) 1997-04-30
WO1991003711A1 (en) 1991-03-21
GB2243684A (en) 1991-11-06
JPH0392716A (en) 1991-04-17
GB2243684B (en) 1993-07-07
JPH0656304B2 (en) 1994-07-27

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20100904