GB2178840B - An optical sensor - Google Patents

An optical sensor

Info

Publication number
GB2178840B
GB2178840B GB8519808A GB8519808A GB2178840B GB 2178840 B GB2178840 B GB 2178840B GB 8519808 A GB8519808 A GB 8519808A GB 8519808 A GB8519808 A GB 8519808A GB 2178840 B GB2178840 B GB 2178840B
Authority
GB
United Kingdom
Prior art keywords
optical sensor
optical
sensor
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
Application number
GB8519808A
Other versions
GB8519808D0 (en
GB2178840A (en
Inventor
David Christopher Munday
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.)
English Electric Co Ltd
Original Assignee
English Electric Co 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 English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB8519808A priority Critical patent/GB2178840B/en
Publication of GB8519808D0 publication Critical patent/GB8519808D0/en
Publication of GB2178840A publication Critical patent/GB2178840A/en
Application granted granted Critical
Publication of GB2178840B publication Critical patent/GB2178840B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)
GB8519808A 1985-08-07 1985-08-07 An optical sensor Expired GB2178840B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8519808A GB2178840B (en) 1985-08-07 1985-08-07 An optical sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8519808A GB2178840B (en) 1985-08-07 1985-08-07 An optical sensor

Publications (3)

Publication Number Publication Date
GB8519808D0 GB8519808D0 (en) 1985-09-11
GB2178840A GB2178840A (en) 1987-02-18
GB2178840B true GB2178840B (en) 1989-08-23

Family

ID=10583430

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8519808A Expired GB2178840B (en) 1985-08-07 1985-08-07 An optical sensor

Country Status (1)

Country Link
GB (1) GB2178840B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2289330B (en) * 1994-05-11 1997-12-10 Fox Thomas Co Ltd Sensor apparatus for use with an electronic lock
ATE223120T1 (en) * 1994-12-22 2002-09-15 Optosys Ag PROXIMITY SWITCH
US6835923B2 (en) 2001-11-16 2004-12-28 Nokia Corporation Method and apparatus for self-monitoring of proximity sensors
US8826188B2 (en) * 2011-08-26 2014-09-02 Qualcomm Incorporated Proximity sensor calibration

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1362376A (en) * 1970-08-12 1974-08-07 Compteurs Comp D Optical proximity detector
GB1375021A (en) * 1970-11-06 1974-11-27
GB1386007A (en) * 1971-02-22 1975-03-05 Schlumberger Compteurs Optical distance measuring methods and apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1362376A (en) * 1970-08-12 1974-08-07 Compteurs Comp D Optical proximity detector
GB1375021A (en) * 1970-11-06 1974-11-27
GB1386007A (en) * 1971-02-22 1975-03-05 Schlumberger Compteurs Optical distance measuring methods and apparatus

Also Published As

Publication number Publication date
GB8519808D0 (en) 1985-09-11
GB2178840A (en) 1987-02-18

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee