GB1577638A - Optical device for an optical safety barrier - Google Patents

Optical device for an optical safety barrier Download PDF

Info

Publication number
GB1577638A
GB1577638A GB408977A GB408977A GB1577638A GB 1577638 A GB1577638 A GB 1577638A GB 408977 A GB408977 A GB 408977A GB 408977 A GB408977 A GB 408977A GB 1577638 A GB1577638 A GB 1577638A
Authority
GB
United Kingdom
Prior art keywords
optical
elements
beams
reflecting
light
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
GB408977A
Other languages
English (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.)
JAY ELECTRONIQUE SA
Original Assignee
JAY ELECTRONIQUE SA
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 JAY ELECTRONIQUE SA filed Critical JAY ELECTRONIQUE SA
Publication of GB1577638A publication Critical patent/GB1577638A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
    • G01V8/22—Detecting, e.g. by using light barriers using multiple transmitters or receivers using reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
GB408977A 1976-02-02 1977-02-01 Optical device for an optical safety barrier Expired GB1577638A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7602816A FR2339917A2 (fr) 1976-02-02 1976-02-02 Dispositif optique pour barriere optique de securite

Publications (1)

Publication Number Publication Date
GB1577638A true GB1577638A (en) 1980-10-29

Family

ID=9168647

Family Applications (1)

Application Number Title Priority Date Filing Date
GB408977A Expired GB1577638A (en) 1976-02-02 1977-02-01 Optical device for an optical safety barrier

Country Status (4)

Country Link
DE (1) DE2700819A1 (enExample)
FR (1) FR2339917A2 (enExample)
GB (1) GB1577638A (enExample)
IT (1) IT1077559B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238379A (en) * 1989-10-13 1991-05-29 John Trett Obstruction detection apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3621961A1 (de) * 1986-07-01 1988-01-14 Wenglorz Sensoric Gmbh Reflexlichtschranke zur beruehrungslosen nachfuehrung eines geraetes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238379A (en) * 1989-10-13 1991-05-29 John Trett Obstruction detection apparatus

Also Published As

Publication number Publication date
FR2339917A2 (fr) 1977-08-26
IT1077559B (it) 1985-05-04
FR2339917B2 (enExample) 1979-08-24
DE2700819A1 (de) 1977-08-04

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Legal Events

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