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GB2288015B - Optical encoder having a photodiode array that serves both for a light detector and an index scale - Google Patents

Optical encoder having a photodiode array that serves both for a light detector and an index scale

Info

Publication number
GB2288015B
GB2288015B GB9505456A GB9505456A GB2288015B GB 2288015 B GB2288015 B GB 2288015B GB 9505456 A GB9505456 A GB 9505456A GB 9505456 A GB9505456 A GB 9505456A GB 2288015 B GB2288015 B GB 2288015B
Authority
GB
United Kingdom
Prior art keywords
serves
light detector
photodiode array
optical encoder
index scale
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
GB9505456A
Other versions
GB2288015A (en
GB9505456D0 (en
Inventor
Tatsuhiko Matsuura
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 GB9505456D0 publication Critical patent/GB9505456D0/en
Publication of GB2288015A publication Critical patent/GB2288015A/en
Application granted granted Critical
Publication of GB2288015B publication Critical patent/GB2288015B/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)
GB9505456A 1994-03-31 1995-03-17 Optical encoder having a photodiode array that serves both for a light detector and an index scale Expired - Fee Related GB2288015B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8574694 1994-03-31

Publications (3)

Publication Number Publication Date
GB9505456D0 GB9505456D0 (en) 1995-05-03
GB2288015A GB2288015A (en) 1995-10-04
GB2288015B true GB2288015B (en) 1997-11-19

Family

ID=13867421

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9505456A Expired - Fee Related GB2288015B (en) 1994-03-31 1995-03-17 Optical encoder having a photodiode array that serves both for a light detector and an index scale

Country Status (2)

Country Link
DE (1) DE19512258C2 (en)
GB (1) GB2288015B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9522491D0 (en) * 1995-11-02 1996-01-03 Renishaw Plc Opto-electronic rotary encoder
DE19830925A1 (en) * 1997-08-07 1999-02-11 Heidenhain Gmbh Dr Johannes Sensing unit for optical position measurement
EP1003012B3 (en) 1998-11-19 2011-04-20 Dr. Johannes Heidenhain GmbH Optical position measuring arrangement
US6674066B1 (en) 1999-04-16 2004-01-06 Canon Kabushiki Kaisha Encoder
US6563108B1 (en) * 1999-10-25 2003-05-13 Quantum Devices, Inc. System for tracking angular and linear motion
JP4908764B2 (en) * 2005-02-04 2012-04-04 キヤノン株式会社 Optical encoder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2104648A (en) * 1981-08-10 1983-03-09 Hewlett Packard Co Apparatus and method for modulating light to generate an index pulse

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4691101A (en) * 1985-06-19 1987-09-01 Hewlett-Packard Company Optical positional encoder comprising immediately adjacent detectors

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2104648A (en) * 1981-08-10 1983-03-09 Hewlett Packard Co Apparatus and method for modulating light to generate an index pulse

Also Published As

Publication number Publication date
DE19512258C2 (en) 2003-05-28
DE19512258A1 (en) 1995-10-05
GB2288015A (en) 1995-10-04
GB9505456D0 (en) 1995-05-03

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Legal Events

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

Effective date: 20080317