GB2169398B - Optical sensors - Google Patents

Optical sensors

Info

Publication number
GB2169398B
GB2169398B GB08500517A GB8500517A GB2169398B GB 2169398 B GB2169398 B GB 2169398B GB 08500517 A GB08500517 A GB 08500517A GB 8500517 A GB8500517 A GB 8500517A GB 2169398 B GB2169398 B GB 2169398B
Authority
GB
United Kingdom
Prior art keywords
optical sensors
sensors
optical
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
GB08500517A
Other versions
GB2169398A (en
Inventor
Kevin Christopher Byron
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.)
STC PLC
Original Assignee
STC PLC
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 STC PLC filed Critical STC PLC
Priority to GB08500517A priority Critical patent/GB2169398B/en
Priority to FR8600156A priority patent/FR2576423A1/en
Priority to JP147286A priority patent/JPS61210916A/en
Publication of GB2169398A publication Critical patent/GB2169398A/en
Application granted granted Critical
Publication of GB2169398B publication Critical patent/GB2169398B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G08B13/186—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 light guides, e.g. optical fibres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/08—Optical fibres; light guides
GB08500517A 1985-01-09 1985-01-09 Optical sensors Expired GB2169398B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB08500517A GB2169398B (en) 1985-01-09 1985-01-09 Optical sensors
FR8600156A FR2576423A1 (en) 1985-01-09 1986-01-08 OPTICAL DETECTOR AND OPTICAL DETECTION METHOD
JP147286A JPS61210916A (en) 1985-01-09 1986-01-09 Photosensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08500517A GB2169398B (en) 1985-01-09 1985-01-09 Optical sensors

Publications (2)

Publication Number Publication Date
GB2169398A GB2169398A (en) 1986-07-09
GB2169398B true GB2169398B (en) 1988-04-13

Family

ID=10572599

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08500517A Expired GB2169398B (en) 1985-01-09 1985-01-09 Optical sensors

Country Status (3)

Country Link
JP (1) JPS61210916A (en)
FR (1) FR2576423A1 (en)
GB (1) GB2169398B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666163B1 (en) * 1990-08-22 1995-03-17 Bertin & Cie OPTO-ELECTRONIC DEVICE FOR DETECTING SMOKE OR GAS SUSPENDED IN AIR.
CN109964259B (en) 2016-11-11 2022-03-25 开利公司 High sensitivity optical fiber based detection
EP4300457A3 (en) 2016-11-11 2024-03-13 Carrier Corporation High sensitivity fiber optic based detection
WO2018089654A1 (en) 2016-11-11 2018-05-17 Carrier Corporation High sensitivity fiber optic based detection
EP3539105A1 (en) 2016-11-11 2019-09-18 Carrier Corporation High sensitivity fiber optic based detection
CA3043587A1 (en) 2016-11-11 2018-05-17 Carrier Corporation High sensitivity fiber optic based detection

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1398977A (en) * 1971-10-07 1975-06-25 Emi Ltd Gas detector
DE2508366C3 (en) * 1975-02-26 1979-05-17 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Optical device with a light curtain
US4379289A (en) * 1979-03-08 1983-04-05 Gte Laboratories Incorporated Fiber optics security system

Also Published As

Publication number Publication date
GB2169398A (en) 1986-07-09
JPS61210916A (en) 1986-09-19
FR2576423A1 (en) 1986-07-25

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Legal Events

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