JPS5622935A - Light scattering system smoke detector - Google Patents

Light scattering system smoke detector

Info

Publication number
JPS5622935A
JPS5622935A JP9915979A JP9915979A JPS5622935A JP S5622935 A JPS5622935 A JP S5622935A JP 9915979 A JP9915979 A JP 9915979A JP 9915979 A JP9915979 A JP 9915979A JP S5622935 A JPS5622935 A JP S5622935A
Authority
JP
Japan
Prior art keywords
light
smoke
scattered light
emission element
scattered
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.)
Granted
Application number
JP9915979A
Other languages
Japanese (ja)
Other versions
JPS5941137B2 (en
Inventor
Tsunehiko Araki
Yoshihiko Okuda
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 Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP9915979A priority Critical patent/JPS5941137B2/en
Publication of JPS5622935A publication Critical patent/JPS5622935A/en
Publication of JPS5941137B2 publication Critical patent/JPS5941137B2/en
Expired 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:To facilitate fabrication while reducing a loss of photodetection by forming an optical system, which focuses the scattered light of a light emitting element in a smoke sensitive area, in the transparent body of a focusing block in one body. CONSTITUTION:Smoke-scattered light is scattered from light emission element 5 provided to one focal axis 14 of focusing block 4 that has elliptic column reflective surface 13 in a transparent body. On one focal axis 14 of the above-mentioned focusing block 4, concave smoke sensitive area 10 is formed and when smoke enters smoke sensitive area 10, smoke-scattered light from light emission element 5 is photodetected by photodetector 6 provided to the other focal axis 20 to detect the smoke. However, a loss of photodetection is generated since the light from light emission element 5 is scattered light. For the purpose, transparent partition plate 23 is formed, making the transparent body continuous, at the intermediate part of cylinder hole 15' and lens 24 is formed in the same body with the plate, so that scattered light b1 projected from light emission element 5 will be focused through lens 24 into focused light b2. As the other optical system that focuses the above- mentioned scattered light, concave mirror 25 can be used.
JP9915979A 1979-07-31 1979-07-31 light scattering smoke detector Expired JPS5941137B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9915979A JPS5941137B2 (en) 1979-07-31 1979-07-31 light scattering smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9915979A JPS5941137B2 (en) 1979-07-31 1979-07-31 light scattering smoke detector

Publications (2)

Publication Number Publication Date
JPS5622935A true JPS5622935A (en) 1981-03-04
JPS5941137B2 JPS5941137B2 (en) 1984-10-04

Family

ID=14239879

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9915979A Expired JPS5941137B2 (en) 1979-07-31 1979-07-31 light scattering smoke detector

Country Status (1)

Country Link
JP (1) JPS5941137B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU168853U1 (en) * 2016-08-22 2017-02-21 федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский национальный исследовательский университет информационных технологий, механики и оптики" (Университет ИТМО) Smoke detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU168853U1 (en) * 2016-08-22 2017-02-21 федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский национальный исследовательский университет информационных технологий, механики и оптики" (Университет ИТМО) Smoke detector

Also Published As

Publication number Publication date
JPS5941137B2 (en) 1984-10-04

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