FR2427619A1 - RING LASER GRAVITY GRADIENT MEASUREMENT DEVICE - Google Patents
RING LASER GRAVITY GRADIENT MEASUREMENT DEVICEInfo
- 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
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.
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)
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 |
CN1352709A (en) | 1999-05-26 | 2002-06-05 | 旭化成株式会社 | 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 |
CN117111163B (en) * | 2023-08-07 | 2024-08-02 | 之江实验室 | Gravity measuring device |
Citations (4)
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 |
-
1979
- 1979-05-10 GB GB7916143A patent/GB2022242B/en not_active Expired
- 1979-05-15 SE SE7904269A patent/SE7904269L/en not_active Application Discontinuation
- 1979-05-15 NL NL7903809A patent/NL7903809A/en not_active Application Discontinuation
- 1979-05-25 CA CA328,424A patent/CA1115544A/en not_active Expired
- 1979-05-25 IT IT49186/79A patent/IT1117191B/en active
- 1979-05-29 DE DE19792921788 patent/DE2921788A1/en not_active Withdrawn
- 1979-05-29 FR FR7913680A patent/FR2427619A1/en active Granted
- 1979-05-29 JP JP6670979A patent/JPS54156686A/en active Pending
Patent Citations (4)
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 |
---|---|
IT7949186A0 (en) | 1979-05-25 |
DE2921788A1 (en) | 1979-12-06 |
IT1117191B (en) | 1986-02-17 |
JPS54156686A (en) | 1979-12-10 |
NL7903809A (en) | 1979-12-04 |
GB2022242B (en) | 1983-04-27 |
SE7904269L (en) | 1979-12-01 |
CA1115544A (en) | 1982-01-05 |
FR2427619B1 (en) | 1983-07-29 |
GB2022242A (en) | 1979-12-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |