JPS5686337A - Infrared-ray laser radar - Google Patents

Infrared-ray laser radar

Info

Publication number
JPS5686337A
JPS5686337A JP16431679A JP16431679A JPS5686337A JP S5686337 A JPS5686337 A JP S5686337A JP 16431679 A JP16431679 A JP 16431679A JP 16431679 A JP16431679 A JP 16431679A JP S5686337 A JPS5686337 A JP S5686337A
Authority
JP
Japan
Prior art keywords
infrared light
lambda1
lambda2
pulse
air
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
JP16431679A
Other languages
Japanese (ja)
Inventor
Takayasu Fukuda
Mitsuo Yoshikawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16431679A priority Critical patent/JPS5686337A/en
Publication of JPS5686337A publication Critical patent/JPS5686337A/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
    • G01N21/25—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
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths

Landscapes

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

Abstract

PURPOSE:To eliminate the uneven concentration of the aerosol in the air as well as the effect of the time change, by using the position of observation of only one system and radiating the infrared light of two wavelengths alternately in a time enough shorter than the changing time constant of the aerosol distribution in the air. CONSTITUTION:When the first pulse is applied to the pulse motor M from the double pulse generator DPG, the infrared light of the wavelength lambda1 is radiated along the optical path. With erasion of the first pulse, the radiation is stopped for the infrared light of the wavelength lambda1. Instead the infrared light of the wavelength lambda2 is radiated. Accordingly, the light reception power to the infrared light of lambda1 and lambda2, i.e., the output voltage Va(t) show the same random change like the curve (n) even though the aerosol has some unevenness in the air. The differential voltage Vs(t) shown by the curves (o) and (p) obtained with reception of the scattered beams of the infrared light of lambda1 and lambda2 shows the absorption quantity of gas. Thus the concentration S of the subject gas can be obtained easily from the differential voltage.
JP16431679A 1979-12-17 1979-12-17 Infrared-ray laser radar Pending JPS5686337A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16431679A JPS5686337A (en) 1979-12-17 1979-12-17 Infrared-ray laser radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16431679A JPS5686337A (en) 1979-12-17 1979-12-17 Infrared-ray laser radar

Publications (1)

Publication Number Publication Date
JPS5686337A true JPS5686337A (en) 1981-07-14

Family

ID=15790824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16431679A Pending JPS5686337A (en) 1979-12-17 1979-12-17 Infrared-ray laser radar

Country Status (1)

Country Link
JP (1) JPS5686337A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01134232A (en) * 1987-10-17 1989-05-26 Daimler Benz Ag Visibility measuring apparatus
JP2009085939A (en) * 2007-08-03 2009-04-23 Valeo Vision Method and device for detecting view field affecting phenomenon by vehicle, and computer program therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01134232A (en) * 1987-10-17 1989-05-26 Daimler Benz Ag Visibility measuring apparatus
JP2009085939A (en) * 2007-08-03 2009-04-23 Valeo Vision Method and device for detecting view field affecting phenomenon by vehicle, and computer program therefor

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