GB2297840B - Sensing means - Google Patents

Sensing means

Info

Publication number
GB2297840B
GB2297840B GB9602772A GB9602772A GB2297840B GB 2297840 B GB2297840 B GB 2297840B GB 9602772 A GB9602772 A GB 9602772A GB 9602772 A GB9602772 A GB 9602772A GB 2297840 B GB2297840 B GB 2297840B
Authority
GB
United Kingdom
Prior art keywords
sensing means
sensing
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 - Lifetime
Application number
GB9602772A
Other versions
GB9602772D0 (en
GB2297840A (en
Inventor
Ian Hugh White
Roger Phillip Griffiths
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.)
R D P ELECTRONICS Ltd
Original Assignee
R D P ELECTRONICS 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 R D P ELECTRONICS Ltd filed Critical R D P ELECTRONICS Ltd
Publication of GB9602772D0 publication Critical patent/GB9602772D0/en
Publication of GB2297840A publication Critical patent/GB2297840A/en
Application granted granted Critical
Publication of GB2297840B publication Critical patent/GB2297840B/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
    • G01D5/347—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 using displacement encoding scales
    • G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
    • G01D5/34715—Scale reading or illumination devices
    • G01D5/34723—Scale reading or illumination devices involving light-guides

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)
GB9602772A 1995-02-09 1996-02-07 Sensing means Expired - Lifetime GB2297840B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9502534.2A GB9502534D0 (en) 1995-02-09 1995-02-09 Sensing means

Publications (3)

Publication Number Publication Date
GB9602772D0 GB9602772D0 (en) 1996-04-10
GB2297840A GB2297840A (en) 1996-08-14
GB2297840B true GB2297840B (en) 1999-06-02

Family

ID=10769336

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9502534.2A Pending GB9502534D0 (en) 1995-02-09 1995-02-09 Sensing means
GB9602772A Expired - Lifetime GB2297840B (en) 1995-02-09 1996-02-07 Sensing means

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9502534.2A Pending GB9502534D0 (en) 1995-02-09 1995-02-09 Sensing means

Country Status (1)

Country Link
GB (2) GB9502534D0 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9807020D0 (en) 1998-04-02 1998-06-03 Bamford Excavators Ltd A method of marking a mechanical element, an encoding scheme, a reading means for said marking and an apparatus for determining the position of said element
DE10201496A1 (en) * 2002-01-17 2003-07-31 Heidenhain Gmbh Dr Johannes Scale and position measuring device for absolute position determination
US7013575B2 (en) * 2002-01-17 2006-03-21 Dr. Johannes Heidenhain Gmbh Position measuring device
GB2396407A (en) 2002-12-19 2004-06-23 Nokia Corp Encoder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210825A2 (en) * 1985-08-01 1987-02-04 LUCAS INDUSTRIES public limited company Position encoder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210825A2 (en) * 1985-08-01 1987-02-04 LUCAS INDUSTRIES public limited company Position encoder

Also Published As

Publication number Publication date
GB9502534D0 (en) 1995-03-29
GB9602772D0 (en) 1996-04-10
GB2297840A (en) 1996-08-14

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Legal Events

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

Expiry date: 20160206