JPS54135596A - Laser radar - Google Patents

Laser radar

Info

Publication number
JPS54135596A
JPS54135596A JP4304478A JP4304478A JPS54135596A JP S54135596 A JPS54135596 A JP S54135596A JP 4304478 A JP4304478 A JP 4304478A JP 4304478 A JP4304478 A JP 4304478A JP S54135596 A JPS54135596 A JP S54135596A
Authority
JP
Japan
Prior art keywords
frequency
mixer
atmosphere
laser beam
securely
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
JP4304478A
Other languages
Japanese (ja)
Other versions
JPS5741696B2 (en
Inventor
Akiya Goto
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4304478A priority Critical patent/JPS54135596A/en
Publication of JPS54135596A publication Critical patent/JPS54135596A/en
Publication of JPS5741696B2 publication Critical patent/JPS5741696B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To observe the activity information of low-altitude atmosphere securely and excellently, by providing a Doppler radar using laser beams outputted simultaneously at different frequencies. CONSTITUTION:Two sets of laser beam differing in frequency emitted by a laser oscillator 1 runs in the same optical path in terms of time and space at excellent coherence to be scattered by the atmosphere. The frequency displacement due to fluctuations of the atmosphere caused by the specified frequency difference is canceled in the going and returning optical paths, and the laser beam to be detected having excellent coherence and less reduction of strength which is frequency-shifted depending on the target aerosol or the like is detected by a receiving optical system 4. When these detection signals are applied to a mixer 5 of high response frequency characteristic, signals of differential frequency components corresponding to the activities of aerosol or the like are generated. These components are beated with the differential frequency components coinciding in time therewith, which is outputted from the mixer 5 of the radiation laser beam through mixer 3 and variable delay circuit 6, in a mixer 7, so that the activity information of low-altitude atmosphere which cannot be observed by transmission of electric waves or the like may be observed securely at excellent S/N ratio.
JP4304478A 1978-04-12 1978-04-12 Laser radar Granted JPS54135596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4304478A JPS54135596A (en) 1978-04-12 1978-04-12 Laser radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4304478A JPS54135596A (en) 1978-04-12 1978-04-12 Laser radar

Publications (2)

Publication Number Publication Date
JPS54135596A true JPS54135596A (en) 1979-10-20
JPS5741696B2 JPS5741696B2 (en) 1982-09-04

Family

ID=12652889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4304478A Granted JPS54135596A (en) 1978-04-12 1978-04-12 Laser radar

Country Status (1)

Country Link
JP (1) JPS54135596A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59656A (en) * 1982-04-07 1984-01-05 フオルソグサンレ−グ，リン Method and device for measuring velocity gradient in fluidized medium
JP2001050894A (en) * 1999-08-16 2001-02-23 Japan Atom Energy Res Inst Method for measuring concentration distance or the like of small amount of substance in air by laser beam remotely and on-line
CN105988124A (en) * 2016-03-04 2016-10-05 中国科学院合肥物质科学研究院 Aerosol pollutant distribution detection method based on absorption extinction ratio calibration profile line
JP2017198673A (en) * 2016-04-25 2017-11-02 株式会社トプコン Phase stabilization of swept source optical coherence tomography (SS-OCT) using reference signal calibration

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59164292U (en) * 1983-04-20 1984-11-02 北川工業株式会社 Board spacer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59656A (en) * 1982-04-07 1984-01-05 フオルソグサンレ−グ，リン Method and device for measuring velocity gradient in fluidized medium
JPH0321072B2 (en) * 1982-04-07 1991-03-20 Fuorusogusanreegu Rin
JP2001050894A (en) * 1999-08-16 2001-02-23 Japan Atom Energy Res Inst Method for measuring concentration distance or the like of small amount of substance in air by laser beam remotely and on-line
CN105988124A (en) * 2016-03-04 2016-10-05 中国科学院合肥物质科学研究院 Aerosol pollutant distribution detection method based on absorption extinction ratio calibration profile line
JP2017198673A (en) * 2016-04-25 2017-11-02 株式会社トプコン Phase stabilization of swept source optical coherence tomography (SS-OCT) using reference signal calibration

Also Published As

Publication number Publication date
JPS5741696B2 (en) 1982-09-04

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