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FR2035878B1 - - Google Patents

Info

Publication number
FR2035878B1
FR2035878B1 FR7010533A FR7010533A FR2035878B1 FR 2035878 B1 FR2035878 B1 FR 2035878B1 FR 7010533 A FR7010533 A FR 7010533A FR 7010533 A FR7010533 A FR 7010533A FR 2035878 B1 FR2035878 B1 FR 2035878B1
Authority
FR
France
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
FR7010533A
Other languages
French (fr)
Other versions
FR2035878A1 (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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2035878A1 publication Critical patent/FR2035878A1/fr
Application granted granted Critical
Publication of FR2035878B1 publication Critical patent/FR2035878B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B9/00—Measuring instruments characterised by the use of optical techniques
    • G01B9/02—Interferometers
    • G01B9/02055—Reduction or prevention of errors; Testing; Calibration
    • G01B9/02075—Reduction or prevention of errors; Testing; Calibration of particular errors
    • G01B9/02078—Caused by ambiguity
    • G01B9/02079—Quadrature detection, i.e. detecting relatively phase-shifted signals
    • G01B9/02081—Quadrature detection, i.e. detecting relatively phase-shifted signals simultaneous quadrature detection, e.g. by spatial phase shifting
    • 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
    • G01S17/34—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2290/00—Aspects of interferometers not specifically covered by any group under G01B9/02
    • G01B2290/70—Using polarization in the interferometer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Instruments For Measurement Of Length By Optical Means (AREA)
FR7010533A 1969-03-25 1970-03-24 Expired FR2035878B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6904621A NL6904621A (en) 1969-03-25 1969-03-25

Publications (2)

Publication Number Publication Date
FR2035878A1 FR2035878A1 (en) 1970-12-24
FR2035878B1 true FR2035878B1 (en) 1974-09-20

Family

ID=19806529

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7010533A Expired FR2035878B1 (en) 1969-03-25 1970-03-24

Country Status (5)

Country Link
BE (1) BE747836A (en)
CH (1) CH520319A (en)
FR (1) FR2035878B1 (en)
GB (1) GB1308957A (en)
NL (1) NL6904621A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2468099A1 (en) * 1979-10-17 1981-04-30 Anvar METHOD AND APPARATUS FOR LASER INTERFEROMETRY WITH TWO WAVE LENGTHS
DD201191B1 (en) * 1981-09-24 1987-07-15 Ilmenau Tech Hochschule KIPPINVARIANT INTERFEROMETER WITH LEVELS MIRROR
GB2127960B (en) * 1982-09-29 1985-12-11 British Aerospace Ring laser gyroscope readout arrangements
GB2129124B (en) * 1982-10-16 1985-12-11 Ferranti Plc Aligning mask with body
GB2256480B (en) * 1991-06-05 1995-02-01 Marconi Gec Ltd Improvements to optical sensors

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1086053A (en) * 1953-07-02 1955-02-09 Csf Improvements to frequency-modulated telemetry systems
US3366954A (en) * 1966-11-04 1968-01-30 Air Force Usa Spectrographical range finder
AU409380B2 (en) * 1966-12-06 1971-01-07 Improvements in or relating to optical mixing devices

Also Published As

Publication number Publication date
NL6904621A (en) 1970-09-29
BE747836A (en) 1970-09-23
GB1308957A (en) 1973-03-07
DE2012946B2 (en) 1975-07-24
CH520319A (en) 1972-03-15
FR2035878A1 (en) 1970-12-24
DE2012946A1 (en) 1970-10-01

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Legal Events

Date Code Title Description
ST Notification of lapse