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FR2258639A1 - Short distance target detection system - uses pulsed semiconductor laser transmission with correlation in receiver - Google Patents

Short distance target detection system - uses pulsed semiconductor laser transmission with correlation in receiver

Info

Publication number
FR2258639A1
FR2258639A1 FR7401798A FR7401798A FR2258639A1 FR 2258639 A1 FR2258639 A1 FR 2258639A1 FR 7401798 A FR7401798 A FR 7401798A FR 7401798 A FR7401798 A FR 7401798A FR 2258639 A1 FR2258639 A1 FR 2258639A1
Authority
FR
France
Prior art keywords
circuit
correlation
semiconductor laser
receiver
detection system
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
FR7401798A
Other languages
French (fr)
Other versions
FR2258639B1 (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.)
Thales SA
Original Assignee
Thomson CSF 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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7401798A priority Critical patent/FR2258639A1/en
Publication of FR2258639A1 publication Critical patent/FR2258639A1/en
Application granted granted Critical
Publication of FR2258639B1 publication Critical patent/FR2258639B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C13/00—Proximity fuzes; Fuzes for remote detonation
    • F42C13/02—Proximity fuzes; Fuzes for remote detonation operated by intensity of light or similar radiation
    • F42C13/023—Proximity fuzes; Fuzes for remote detonation operated by intensity of light or similar radiation using active distance measurement
    • 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
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

A semiconductor laser (2) emits a luminous transmission through an optical system (1). The laser is powered from a power supply (3) comprising a power supply circuit (4) with modulator (5) which modulates the excitation current (I). The modulation is generated in a circuit (6) comprising a coded signal generator (8) with coding circuit (9) and synchronisation circuit (7). Received signals pass through an optical system (11) to a photoreceiver (13). Video frequency output signal is amplified (14) and limited (15) for application to a circuit (16) for correlation with the delayed (17) modulation signal (51). The output is integrated (19) for comparison with a reference level (20) to activate a firing pulse circuit (21).
FR7401798A 1974-01-18 1974-01-18 Short distance target detection system - uses pulsed semiconductor laser transmission with correlation in receiver Granted FR2258639A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7401798A FR2258639A1 (en) 1974-01-18 1974-01-18 Short distance target detection system - uses pulsed semiconductor laser transmission with correlation in receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7401798A FR2258639A1 (en) 1974-01-18 1974-01-18 Short distance target detection system - uses pulsed semiconductor laser transmission with correlation in receiver

Publications (2)

Publication Number Publication Date
FR2258639A1 true FR2258639A1 (en) 1975-08-18
FR2258639B1 FR2258639B1 (en) 1978-08-18

Family

ID=9133685

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7401798A Granted FR2258639A1 (en) 1974-01-18 1974-01-18 Short distance target detection system - uses pulsed semiconductor laser transmission with correlation in receiver

Country Status (1)

Country Link
FR (1) FR2258639A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2382672A1 (en) * 1977-03-01 1978-09-29 Applic Tech Et Missile light operated proximity detector - has laser diode source associated with rapid switching logic amplifier and electrically fired fuse
DE3038141C1 (en) * 1980-10-09 1982-02-18 Robert 7995 Neukirch Buck Electronic, non-contact switching device
FR2492136A1 (en) * 1980-10-13 1982-04-16 Commissariat Energie Atomique INVIOLABLE BARRIER FOR PROTECTION AGAINST INTRUSIONS
US5142985A (en) * 1990-06-04 1992-09-01 Motorola, Inc. Optical detection device
US5142984A (en) * 1990-06-04 1992-09-01 Motorola, Inc. Optical detection device
FR2685092A1 (en) * 1991-12-16 1993-06-18 Sick Optik Elektronik Erwin OPTICAL METHOD AND APPARATUS FOR DETECTING OBJECTS IN A SURVEILLED AREA.
EP0742450A2 (en) * 1995-05-09 1996-11-13 Erwin Sick GmbH Optik-Elektronik Method and apparatus for measuring the time for light to travel a measurement path extending between a measurement apparatus and a reflecting object
EP0854368A2 (en) * 1997-01-20 1998-07-22 Sick AG Light sensor with signal evaluation based on time of flight of light
ES2143417A1 (en) * 1998-05-13 2000-05-01 Elapsa Sl System for measuring distances by a laser beam modulated with pseudorandom signals

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2382672A1 (en) * 1977-03-01 1978-09-29 Applic Tech Et Missile light operated proximity detector - has laser diode source associated with rapid switching logic amplifier and electrically fired fuse
DE3038141C1 (en) * 1980-10-09 1982-02-18 Robert 7995 Neukirch Buck Electronic, non-contact switching device
EP0049794A2 (en) * 1980-10-09 1982-04-21 Robert Buck Electronic switching device operated without contact
EP0049794A3 (en) * 1980-10-09 1982-09-01 Robert Buck Electronic switching device operated without contact
FR2492136A1 (en) * 1980-10-13 1982-04-16 Commissariat Energie Atomique INVIOLABLE BARRIER FOR PROTECTION AGAINST INTRUSIONS
EP0050549A1 (en) * 1980-10-13 1982-04-28 Commissariat à l'Energie Atomique Inviolable barrier for the protection against intrusions
US4465998A (en) * 1980-10-13 1984-08-14 Commissariat A L'energie Atomique Burglar-proof barrier
US5142984A (en) * 1990-06-04 1992-09-01 Motorola, Inc. Optical detection device
US5142985A (en) * 1990-06-04 1992-09-01 Motorola, Inc. Optical detection device
US5277113A (en) * 1990-06-04 1994-01-11 Motorola, Inc. Optical detection device
FR2685092A1 (en) * 1991-12-16 1993-06-18 Sick Optik Elektronik Erwin OPTICAL METHOD AND APPARATUS FOR DETECTING OBJECTS IN A SURVEILLED AREA.
EP0742450A2 (en) * 1995-05-09 1996-11-13 Erwin Sick GmbH Optik-Elektronik Method and apparatus for measuring the time for light to travel a measurement path extending between a measurement apparatus and a reflecting object
EP0742450A3 (en) * 1995-05-09 1998-11-18 Sick Ag Method and apparatus for measuring the time for light to travel a measurement path extending between a measurement apparatus and a reflecting object
EP0854368A2 (en) * 1997-01-20 1998-07-22 Sick AG Light sensor with signal evaluation based on time of flight of light
EP0854368A3 (en) * 1997-01-20 1999-09-01 Sick AG Light sensor with signal evaluation based on time of flight of light
US6100539A (en) * 1997-01-20 2000-08-08 Sick Ag Light sensor with evaluation of the light transit time
ES2143417A1 (en) * 1998-05-13 2000-05-01 Elapsa Sl System for measuring distances by a laser beam modulated with pseudorandom signals

Also Published As

Publication number Publication date
FR2258639B1 (en) 1978-08-18

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Legal Events

Date Code Title Description
ST Notification of lapse