FR2389888A1 - Atmospheric pollutant detector system - performs qualitative and quantitative determination of components using laser beams of different wavelengths - Google Patents

Atmospheric pollutant detector system - performs qualitative and quantitative determination of components using laser beams of different wavelengths

Info

Publication number
FR2389888A1
FR2389888A1 FR7713819A FR7713819A FR2389888A1 FR 2389888 A1 FR2389888 A1 FR 2389888A1 FR 7713819 A FR7713819 A FR 7713819A FR 7713819 A FR7713819 A FR 7713819A FR 2389888 A1 FR2389888 A1 FR 2389888A1
Authority
FR
France
Prior art keywords
different wavelengths
components
laser beams
detector system
quantitative determination
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
FR7713819A
Other languages
French (fr)
Other versions
FR2389888B1 (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.)
Alcatel Lucent SAS
Original Assignee
Compagnie Generale dElectricite 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 Compagnie Generale dElectricite SA filed Critical Compagnie Generale dElectricite SA
Priority to FR7713819A priority Critical patent/FR2389888A1/en
Publication of FR2389888A1 publication Critical patent/FR2389888A1/en
Application granted granted Critical
Publication of FR2389888B1 publication Critical patent/FR2389888B1/fr
Granted 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
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The system produces a laser beam (3). The emission spectrum of the beam includes a large number of different wavelengths. As many as 80 different wavelengths may be used. An analyser, e.g. a spectrometer, receives the reflected beam through the gas and determines the wavelength of the absorbed rays and their absorption rates. A convex lens (5) is mounted in front of the analyser (4). The atmospheric pollution detected in the region of a chemical works include : sulphur anhydrides, oxides of nitrogen, and metallic salts.
FR7713819A 1977-05-06 1977-05-06 Atmospheric pollutant detector system - performs qualitative and quantitative determination of components using laser beams of different wavelengths Granted FR2389888A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7713819A FR2389888A1 (en) 1977-05-06 1977-05-06 Atmospheric pollutant detector system - performs qualitative and quantitative determination of components using laser beams of different wavelengths

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7713819A FR2389888A1 (en) 1977-05-06 1977-05-06 Atmospheric pollutant detector system - performs qualitative and quantitative determination of components using laser beams of different wavelengths

Publications (2)

Publication Number Publication Date
FR2389888A1 true FR2389888A1 (en) 1978-12-01
FR2389888B1 FR2389888B1 (en) 1980-03-14

Family

ID=9190439

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7713819A Granted FR2389888A1 (en) 1977-05-06 1977-05-06 Atmospheric pollutant detector system - performs qualitative and quantitative determination of components using laser beams of different wavelengths

Country Status (1)

Country Link
FR (1) FR2389888A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4450356A (en) * 1982-06-07 1984-05-22 Sri International Frequency-mixed CO2 laser radar for remote detection of gases in the atmosphere
US6344648B1 (en) 1998-10-23 2002-02-05 Aerospatiale Matra System for detection and measurement of one or several gases in a gas mix

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4450356A (en) * 1982-06-07 1984-05-22 Sri International Frequency-mixed CO2 laser radar for remote detection of gases in the atmosphere
US6344648B1 (en) 1998-10-23 2002-02-05 Aerospatiale Matra System for detection and measurement of one or several gases in a gas mix

Also Published As

Publication number Publication date
FR2389888B1 (en) 1980-03-14

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Legal Events

Date Code Title Description
ST Notification of lapse