JPS51135584A - Smoke detector - Google Patents

Smoke detector

Info

Publication number
JPS51135584A
JPS51135584A JP6040275A JP6040275A JPS51135584A JP S51135584 A JPS51135584 A JP S51135584A JP 6040275 A JP6040275 A JP 6040275A JP 6040275 A JP6040275 A JP 6040275A JP S51135584 A JPS51135584 A JP S51135584A
Authority
JP
Japan
Prior art keywords
smoke detector
optical axis
reflection mirror
detection sensitivity
light emitting
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.)
Pending
Application number
JP6040275A
Other languages
Japanese (ja)
Inventor
Seiji Ishikawa
Hitoo Iwasa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6040275A priority Critical patent/JPS51135584A/en
Publication of JPS51135584A publication Critical patent/JPS51135584A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke

Abstract

PURPOSE:Improve smoke detection sensitivity by successively arranging light emitting elements and light receiving elements on optical axis of a concave reflection mirror.
JP6040275A 1975-05-19 1975-05-19 Smoke detector Pending JPS51135584A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6040275A JPS51135584A (en) 1975-05-19 1975-05-19 Smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6040275A JPS51135584A (en) 1975-05-19 1975-05-19 Smoke detector

Publications (1)

Publication Number Publication Date
JPS51135584A true JPS51135584A (en) 1976-11-24

Family

ID=13141125

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6040275A Pending JPS51135584A (en) 1975-05-19 1975-05-19 Smoke detector

Country Status (1)

Country Link
JP (1) JPS51135584A (en)

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