FR2427619A1 - RING LASER GRAVITY GRADIENT MEASUREMENT DEVICE - Google Patents

RING LASER GRAVITY GRADIENT MEASUREMENT DEVICE

Info

Publication number
FR2427619A1
FR2427619A1 FR7913680A FR7913680A FR2427619A1 FR 2427619 A1 FR2427619 A1 FR 2427619A1 FR 7913680 A FR7913680 A FR 7913680A FR 7913680 A FR7913680 A FR 7913680A FR 2427619 A1 FR2427619 A1 FR 2427619A1
Authority
FR
France
Prior art keywords
ring laser
gravity
gravity gradient
measurement device
laser
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
FR7913680A
Other languages
French (fr)
Other versions
FR2427619B1 (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.)
Standard Oil Co
Original Assignee
Standard Oil Co
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 Standard Oil Co filed Critical Standard Oil Co
Publication of FR2427619A1 publication Critical patent/FR2427619A1/en
Application granted granted Critical
Publication of FR2427619B1 publication Critical patent/FR2427619B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V7/00—Measuring gravitational fields or waves; Gravimetric prospecting or detecting

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

L'invention concerne la mesure des gradients de gravité. Un dispositif de mesure de gradient de gravité comprend essentiellement un laser en anneau qui est constitué par un tube laser 2 et une cavité définie par quatre miroirs 4, 6, 8 et 10; et des éléments modulateurs 12 et 22 qui sont placés sur le chemin du faisceau laser 3. Les éléments 12 et 22 produisent une modulation différentielle des modes de polarisation du laser en anneau qui est fonction de la différence de gravité entre leux emplacements respectifs. Un détecteur de battements 40 fournit un signal de sortie représentatif de cette différence. Application à la diagraphie dans les sondages.The invention relates to the measurement of gravity gradients. A gravity gradient measuring device essentially comprises a ring laser which consists of a laser tube 2 and a cavity defined by four mirrors 4, 6, 8 and 10; and modulator elements 12 and 22 which are placed in the path of the laser beam 3. Elements 12 and 22 produce a differential modulation of the polarization modes of the ring laser which is a function of the difference in gravity between the two respective locations. A beat detector 40 provides an output signal representative of this difference. Application to logging in boreholes.

FR7913680A 1978-05-30 1979-05-29 RING LASER GRAVITY GRADIENT MEASUREMENT DEVICE Granted FR2427619A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US91097278A 1978-05-30 1978-05-30

Publications (2)

Publication Number Publication Date
FR2427619A1 true FR2427619A1 (en) 1979-12-28
FR2427619B1 FR2427619B1 (en) 1983-07-29

Family

ID=25429590

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7913680A Granted FR2427619A1 (en) 1978-05-30 1979-05-29 RING LASER GRAVITY GRADIENT MEASUREMENT DEVICE

Country Status (8)

Country Link
JP (1) JPS54156686A (en)
CA (1) CA1115544A (en)
DE (1) DE2921788A1 (en)
FR (1) FR2427619A1 (en)
GB (1) GB2022242B (en)
IT (1) IT1117191B (en)
NL (1) NL7903809A (en)
SE (1) SE7904269L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3517825C1 (en) * 1985-05-17 1986-04-30 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Fibre optical sensor
AU4782100A (en) 1999-05-26 2000-12-18 Asahi Kasei Kabushiki Kaisha Plushed fabric and stuffed toy using the same
RU2454685C1 (en) * 2010-11-25 2012-06-27 Государственное учреждение Научный центр гравитационно-волновых исследований "Дулкын" Gravitational wave detector
CN117111163A (en) * 2023-08-07 2023-11-24 之江实验室 Gravity measuring device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB917479A (en) * 1960-09-23 1963-02-06 Brookhirst Igranic Ltd Electromagnetic relay
US3194920A (en) * 1964-06-23 1965-07-13 Ward Leonard Electric Co Electrical contactor
US3648203A (en) * 1970-08-26 1972-03-07 Honeywell Inc Relay switch housing
GB1273255A (en) * 1969-09-11 1972-05-03 Midland Electric Mfg Co Ltd Electromagnetic switches

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB917479A (en) * 1960-09-23 1963-02-06 Brookhirst Igranic Ltd Electromagnetic relay
US3194920A (en) * 1964-06-23 1965-07-13 Ward Leonard Electric Co Electrical contactor
GB1273255A (en) * 1969-09-11 1972-05-03 Midland Electric Mfg Co Ltd Electromagnetic switches
US3648203A (en) * 1970-08-26 1972-03-07 Honeywell Inc Relay switch housing

Also Published As

Publication number Publication date
CA1115544A (en) 1982-01-05
IT7949186A0 (en) 1979-05-25
DE2921788A1 (en) 1979-12-06
SE7904269L (en) 1979-12-01
JPS54156686A (en) 1979-12-10
GB2022242B (en) 1983-04-27
IT1117191B (en) 1986-02-17
NL7903809A (en) 1979-12-04
GB2022242A (en) 1979-12-12
FR2427619B1 (en) 1983-07-29

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