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GB1517424A - Optical device for an optical safety barrier - Google Patents

Optical device for an optical safety barrier

Info

Publication number
GB1517424A
GB1517424A GB848376A GB848376A GB1517424A GB 1517424 A GB1517424 A GB 1517424A GB 848376 A GB848376 A GB 848376A GB 848376 A GB848376 A GB 848376A GB 1517424 A GB1517424 A GB 1517424A
Authority
GB
United Kingdom
Prior art keywords
safety barrier
optical
detectors
march
beams
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
GB848376A
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 GB1517424A publication Critical patent/GB1517424A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/12—Beam splitting or combining systems operating by refraction only
    • G02B27/123—The splitting element being a lens or a system of lenses, including arrays and surfaces with refractive power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/12—Beam splitting or combining systems operating by refraction only
    • G02B27/126—The splitting element being a prism or prismatic array, including systems based on total internal reflection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/143—Beam splitting or combining systems operating by reflection only using macroscopically faceted or segmented reflective surfaces
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
    • G08B13/184—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using radiation reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1517424 Optical safety barrier JAY ELECTRONIQUE 3 March 1976 [14 March 1975] 08483/76 HeadingGlA In an optical safety barrier radiation from a source S is split into two beams of different directions by the combination of a plano-convex lens and a prism, or, by two mirrors of different inclination with respect to one another Fig. 2 (not shown). Two catadiotropic retro-reflectors R 1 , R 2 are positioned to reflect back the beams, as shown, so that each is directed to a corresponding detector C 1 or C 2 . The invention is said to be an improvement over existing safety barriers since a planar reflecting surface will now be detected. The output of the detectors are fed to an AND gate, so that if both detectors are not illuminated an output can be produced which indicates the presence of an object in the safety barrier.
GB848376A 1975-03-14 1976-03-03 Optical device for an optical safety barrier Expired GB1517424A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7508156A FR2304128A1 (en) 1975-03-14 1975-03-14 OPTICAL DEVICE FOR OPTICAL SAFETY BARRIERS

Publications (1)

Publication Number Publication Date
GB1517424A true GB1517424A (en) 1978-07-12

Family

ID=9152627

Family Applications (1)

Application Number Title Priority Date Filing Date
GB848376A Expired GB1517424A (en) 1975-03-14 1976-03-03 Optical device for an optical safety barrier

Country Status (4)

Country Link
DE (1) DE2609068A1 (en)
FR (1) FR2304128A1 (en)
GB (1) GB1517424A (en)
IT (1) IT1056837B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3139558C2 (en) * 1981-10-05 1987-05-27 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch V light barrier
ATE18612T1 (en) 1981-12-22 1986-03-15 Elesta Ag Elektronik RETROFLECTIVE LIGHT BARRIER WITH EXTENDED FUNCTIONAL RANGE.
FR2520137B1 (en) * 1982-01-21 1986-10-31 Deude Rene INVIOLABLE MONOBLOCK OPTO-ELECTRONIC SYSTEM FOR DETECTION, CONTROL, ANALOGUE, DIGITAL AND ALL OR NOTHING INFORMATION
DE4041363A1 (en) * 1990-12-20 1992-07-02 Hermann Gmbh Co Heinrich Transparent object detection arrangement for moving glass bottles - has two light barriers inclined at acute angle with logic circuit for combining their output signals
DE19730341A1 (en) * 1997-07-15 1999-01-21 Sick Ag Method for operating an opto-electronic sensor arrangement
DE29714438U1 (en) * 1997-08-12 1997-10-16 Sick AG, 79183 Waldkirch Photoelectric barrier

Also Published As

Publication number Publication date
IT1056837B (en) 1982-02-20
DE2609068A1 (en) 1976-09-23
FR2304128A1 (en) 1976-10-08
FR2304128B1 (en) 1979-01-05

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Legal Events

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