NO137298C - LASER DISTANCE MEASURES. - Google Patents

LASER DISTANCE MEASURES.

Info

Publication number
NO137298C
NO137298C NO215873A NO215873A NO137298C NO 137298 C NO137298 C NO 137298C NO 215873 A NO215873 A NO 215873A NO 215873 A NO215873 A NO 215873A NO 137298 C NO137298 C NO 137298C
Authority
NO
Norway
Prior art keywords
diode
noise
feed
less
back loop
Prior art date
Application number
NO215873A
Other languages
Norwegian (no)
Other versions
NO137298B (en
Inventor
Pierre Hermet
Rodolphe Laesser
Original Assignee
Comp Generale Electricite
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 Comp Generale Electricite filed Critical Comp Generale Electricite
Publication of NO137298B publication Critical patent/NO137298B/en
Publication of NO137298C publication Critical patent/NO137298C/en

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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G01S7/486—Receivers
    • G01S7/487—Extracting wanted echo signals, e.g. pulse detection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G01S7/486—Receivers
    • G01S7/4861—Circuits for detection, sampling, integration or read-out

Landscapes

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

Abstract

1394500 Photo-electric distance-measuring COMPAGNIE GENERALE D'ELECTRICITE 29 May 1973 [30 May 1972] 25607/73 Heading H4D Relates to a pulsed laser 1 distance-measuring apparatus utilizing a receiving photo-diode 3. According to the invention the reverse bias voltage (R.B.V.) applied to diode 3 is controlled by a feed-back loop incorporating a detector 8 affording a continuous signal representing the noise output (e.g. the level of the peak of noise pulses) of diode 3 and a device 9 controlling the R.B.V. such that the noise output always equals a reference magnitude; a circuit 10 (e.g. a monostable see Fig. 2 (not shown)) temporarily lowering the R.B.V. in a duration (e.g. less than that corresponding to maximum target range) less than the response time of the feed-back loop; and a threshold device 5 passing only those echo pulses above a predetermined level. Thus the apparatus has a high sensitivity with a low probability of triggering a ranging counter 7 on a noise pulse. The temporary lowering of the R.B.V. may take place at two levels to obviate interference due to e.g. reflexion by a nearby fog bank.
NO215873A 1972-05-30 1973-05-25 LASER DISTANCE MEASURES. NO137298C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7219351A FR2186659B1 (en) 1972-05-30 1972-05-30

Publications (2)

Publication Number Publication Date
NO137298B NO137298B (en) 1977-10-24
NO137298C true NO137298C (en) 1978-02-01

Family

ID=9099345

Family Applications (1)

Application Number Title Priority Date Filing Date
NO215873A NO137298C (en) 1972-05-30 1973-05-25 LASER DISTANCE MEASURES.

Country Status (10)

Country Link
JP (1) JPS5536951B2 (en)
BE (1) BE799646A (en)
CH (1) CH564200A5 (en)
DE (1) DE2326560C2 (en)
FR (1) FR2186659B1 (en)
GB (1) GB1394500A (en)
IT (1) IT988776B (en)
NL (1) NL7307614A (en)
NO (1) NO137298C (en)
SE (1) SE386746B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001614A (en) * 1975-08-27 1977-01-04 Hughes Aircraft Company Bias circuit for a photo-avalanche diode
DE3324341C2 (en) * 1983-07-06 1986-02-13 Ralf 6750 Kaiserslautern Hinkel Device for the precise determination of short transit times of electronically generated pulses

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE314215B (en) * 1968-04-17 1969-09-01 Bofors Ab
US3516367A (en) * 1968-06-20 1970-06-23 Warren L Holtzman Adjustable dolly-type vehicle
US3666367A (en) * 1970-06-01 1972-05-30 Hughes Aircraft Co Digital range measuring system

Also Published As

Publication number Publication date
NO137298B (en) 1977-10-24
GB1394500A (en) 1975-05-14
JPS5536951B2 (en) 1980-09-25
DE2326560C2 (en) 1982-09-30
JPS4944768A (en) 1974-04-27
DE2326560A1 (en) 1973-12-13
CH564200A5 (en) 1975-07-15
IT988776B (en) 1975-04-30
FR2186659A1 (en) 1974-01-11
NL7307614A (en) 1973-12-04
SE386746B (en) 1976-08-16
FR2186659B1 (en) 1974-12-27
BE799646A (en) 1973-11-19

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