FR2292213A1 - Map contour-line reading instrument - determines relative position of lines using moire fringe effect produced by structured beams of light - Google Patents

Map contour-line reading instrument - determines relative position of lines using moire fringe effect produced by structured beams of light

Info

Publication number
FR2292213A1
FR2292213A1 FR7438257A FR7438257A FR2292213A1 FR 2292213 A1 FR2292213 A1 FR 2292213A1 FR 7438257 A FR7438257 A FR 7438257A FR 7438257 A FR7438257 A FR 7438257A FR 2292213 A1 FR2292213 A1 FR 2292213A1
Authority
FR
France
Prior art keywords
relative position
moire fringe
lines
light
reference plane
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
FR7438257A
Other languages
French (fr)
Other versions
FR2292213B1 (en
Inventor
Ernst Mathieu
Patrice Benoit
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.)
Compagnie Electro Mecanique SA
Original Assignee
Compagnie Electro Mecanique 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 Compagnie Electro Mecanique SA filed Critical Compagnie Electro Mecanique SA
Priority to FR7438257A priority Critical patent/FR2292213A1/en
Publication of FR2292213A1 publication Critical patent/FR2292213A1/en
Application granted granted Critical
Publication of FR2292213B1 publication Critical patent/FR2292213B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/60—Systems using moiré fringes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
    • G01B11/2531—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object using several gratings, projected with variable angle of incidence on the object, and one detection device

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

An optical instrument, is used to determine the relative position of level or altitude contour lines on a map. The instrument is based on the effect obtained when a chosen reference plane is displaced by optical means on the map. If the reference plane is displaced upward and for a distance not greater than half the distance between two contour lines, then a contour line for the new position of the reference plane will be contained within the previous corresponding contour line for contour lines representing a hill, or without the previous line for contour lines representing a valley. The instrument has means of projecting two periodic structured light beams (9a, 9b) onto the reference plate (PR) so as to produce a Moire fringe effect and recording the change when displacing the reference plane (PR) by a small distance (DELTAe).
FR7438257A 1974-11-21 1974-11-21 Map contour-line reading instrument - determines relative position of lines using moire fringe effect produced by structured beams of light Granted FR2292213A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7438257A FR2292213A1 (en) 1974-11-21 1974-11-21 Map contour-line reading instrument - determines relative position of lines using moire fringe effect produced by structured beams of light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7438257A FR2292213A1 (en) 1974-11-21 1974-11-21 Map contour-line reading instrument - determines relative position of lines using moire fringe effect produced by structured beams of light

Publications (2)

Publication Number Publication Date
FR2292213A1 true FR2292213A1 (en) 1976-06-18
FR2292213B1 FR2292213B1 (en) 1977-03-25

Family

ID=9145120

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7438257A Granted FR2292213A1 (en) 1974-11-21 1974-11-21 Map contour-line reading instrument - determines relative position of lines using moire fringe effect produced by structured beams of light

Country Status (1)

Country Link
FR (1) FR2292213A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121353A1 (en) * 1983-03-07 1984-10-10 New York Institute Of Technology Projection moire topography
EP0275982A1 (en) * 1987-01-20 1988-07-27 Communaute Europeenne De L'energie Atomique (Euratom) Device for interferometrically analysing the deformations of a body
EP0363542A1 (en) * 1987-05-15 1990-04-18 TELSA INFORMATIQUE Société Anonyme Videogrammetic device and process
EP0445618A2 (en) * 1990-03-09 1991-09-11 Firma Carl Zeiss Device and procedure to measure without contact the surface-contour of an object
EP0470816A1 (en) * 1990-08-08 1992-02-12 Industrial Technology Institute Field shift moire system
EP0551955A1 (en) * 1992-01-15 1993-07-21 EUCLID MEDICAL INSTRUMENTS Inc. System for determining the topography of a curved surface
WO2015169873A1 (en) * 2014-05-07 2015-11-12 Areva Np Device and method for three-dimensional reconstruction of a scene by image analysis

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121353A1 (en) * 1983-03-07 1984-10-10 New York Institute Of Technology Projection moire topography
US4564295A (en) * 1983-03-07 1986-01-14 New York Institute Of Technology Apparatus and method for projection moire topography
EP0275982A1 (en) * 1987-01-20 1988-07-27 Communaute Europeenne De L'energie Atomique (Euratom) Device for interferometrically analysing the deformations of a body
EP0363542A1 (en) * 1987-05-15 1990-04-18 TELSA INFORMATIQUE Société Anonyme Videogrammetic device and process
EP0445618A3 (en) * 1990-03-09 1992-03-11 Firma Carl Zeiss Device and procedure to measure without contact the surface-contour of an object
EP0445618A2 (en) * 1990-03-09 1991-09-11 Firma Carl Zeiss Device and procedure to measure without contact the surface-contour of an object
US5135309A (en) * 1990-03-09 1992-08-04 Carl-Zeiss-Stiftung Method and apparatus for non-contact measuring of object surfaces
EP0470816A1 (en) * 1990-08-08 1992-02-12 Industrial Technology Institute Field shift moire system
EP0551955A1 (en) * 1992-01-15 1993-07-21 EUCLID MEDICAL INSTRUMENTS Inc. System for determining the topography of a curved surface
US5406342A (en) * 1992-01-15 1995-04-11 Euclid Medical Instruments System for determining the topography of a curved surface
WO2015169873A1 (en) * 2014-05-07 2015-11-12 Areva Np Device and method for three-dimensional reconstruction of a scene by image analysis
FR3020871A1 (en) * 2014-05-07 2015-11-13 Areva Np DEVICE AND METHOD FOR THREE-DIMENSIONAL RECONSTRUCTION OF A SCENE BY IMAGE ANALYSIS
US10113867B2 (en) 2014-05-07 2018-10-30 Areva Np Device and method for three-dimensional reconstruction of a scene by image analysis

Also Published As

Publication number Publication date
FR2292213B1 (en) 1977-03-25

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Legal Events

Date Code Title Description
AM Act modifying the rights related to an application or a patent
ST Notification of lapse