GB1534360A - Method of and apparatus for range finding - Google Patents

Method of and apparatus for range finding

Info

Publication number
GB1534360A
GB1534360A GB1314476A GB1314476A GB1534360A GB 1534360 A GB1534360 A GB 1534360A GB 1314476 A GB1314476 A GB 1314476A GB 1314476 A GB1314476 A GB 1314476A GB 1534360 A GB1534360 A GB 1534360A
Authority
GB
United Kingdom
Prior art keywords
image
photoelectric receiver
maximum
assigned
output signal
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.)
Expired
Application number
GB1314476A
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.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz Wetzlar GmbH
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 Ernst Leitz Wetzlar GmbH filed Critical Ernst Leitz Wetzlar GmbH
Publication of GB1534360A publication Critical patent/GB1534360A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/02—Details
    • G01C3/06—Use of electric means to obtain final indication
    • G01C3/08—Use of electric radiation detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Measurement Of Optical Distance (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Image Analysis (AREA)

Abstract

For the purpose of distance measurement, use is made of an optical correlator which has at least one imaging system (11, 15), at least one optically active grid structure (10) and a photoelectric receiver system (20-27) assigned to said structure. A principal maximum in the output signal of the photoelectric receiver system characterises the geometrical image position. For the purpose of uniquely determining this maximum as against other possible maxima, different beam paths are produced in the image space and/or Fourier space, and photoelectric receiver systems are assigned to them. In the case of an axial relative movement of an object image with respect to the grid structure, there is produced at each of these photoelectric receiver systems an output signal which always differs from that obtained from another beam path in terms of its frequency and differs in its phase angle in the ratio of the two signal frequencies, both signals having the same phase angles for the principal maximum. The geometrical image position of the principal maximum with respect to the geometric image positions of other possible maxima is determined by comparing these phase angles. <IMAGE>
GB1314476A 1975-04-24 1976-04-01 Method of and apparatus for range finding Expired GB1534360A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752518209 DE2518209C3 (en) 1975-04-24 1975-04-24 Method and device for photoelectrically determining the position of at least one focal plane of an image

Publications (1)

Publication Number Publication Date
GB1534360A true GB1534360A (en) 1978-12-06

Family

ID=5944894

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1314476A Expired GB1534360A (en) 1975-04-24 1976-04-01 Method of and apparatus for range finding

Country Status (8)

Country Link
CA (1) CA1082944A (en)
CH (1) CH611430A5 (en)
DE (1) DE2518209C3 (en)
FR (1) FR2308939A1 (en)
GB (1) GB1534360A (en)
IT (1) IT1059456B (en)
NL (1) NL182245C (en)
SE (1) SE412801B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147762A (en) * 1983-10-10 1985-05-15 Audim Sa An artifical binocular vision system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147762A (en) * 1983-10-10 1985-05-15 Audim Sa An artifical binocular vision system

Also Published As

Publication number Publication date
FR2308939B1 (en) 1981-08-21
DE2518209A1 (en) 1976-11-04
DE2518209B2 (en) 1977-09-22
SE7604673L (en) 1976-10-25
NL182245C (en) 1988-02-01
SE412801B (en) 1980-03-17
CA1082944A (en) 1980-08-05
NL7604351A (en) 1976-10-26
DE2518209C3 (en) 1978-05-18
IT1059456B (en) 1982-05-31
CH611430A5 (en) 1979-05-31
NL182245B (en) 1987-09-01
FR2308939A1 (en) 1976-11-19

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee