FR2413635A1 - LASER GYROSCOPE - Google Patents

LASER GYROSCOPE

Info

Publication number
FR2413635A1
FR2413635A1 FR7836927A FR7836927A FR2413635A1 FR 2413635 A1 FR2413635 A1 FR 2413635A1 FR 7836927 A FR7836927 A FR 7836927A FR 7836927 A FR7836927 A FR 7836927A FR 2413635 A1 FR2413635 A1 FR 2413635A1
Authority
FR
France
Prior art keywords
frequency
gyroscope
laser gyroscope
block
frequency separation
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
FR7836927A
Other languages
French (fr)
Other versions
FR2413635B1 (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.)
Raytheon Co
Original Assignee
Raytheon 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 Raytheon Co filed Critical Raytheon Co
Publication of FR2413635A1 publication Critical patent/FR2413635A1/en
Application granted granted Critical
Publication of FR2413635B1 publication Critical patent/FR2413635B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/58—Turn-sensitive devices without moving masses
    • G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
    • G01C19/66—Ring laser gyrometers
    • G01C19/667—Ring laser gyrometers using a multioscillator ring laser
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
    • H01S3/083—Ring lasers

Abstract

L'INVENTION CONCERNE UN GYROSCOPE A LASER A QUATRE FREQUENCES. IL EST REALISE DANS UN BLOC DE MATIERE SOLIDE DE FAIBLE COEFFICIENT DE DILATATION THERMIQUE, ET DANS LEQUEL EST FORME UN TRAJET DE PROPAGATION NON PLAN PRODUISANT UNE PREMIERE SEPARATION DE FREQUENCE. UNE SECONDE SEPARATION DE FREQUENCE EST ASSUREE PAR UN ROTATEUR DE FARADAY COMPRENANT UN MINCE BLOC DE VERRE DOPE DE TERRES RARES DANS UNE OUVERTURE D'UN AIMANT PERMANENT. UN DETECTEUR DE SORTIE DELIVRE DES SIGNAUX DONT LA FREQUENCE EST PROPORTIONNELLE A LA VITESSE DE ROTATION DU GYROSCOPE. APPLICATIONS A LA NAVIGATION.THE INVENTION RELATES TO A FOUR FREQUENCY LASER GYROSCOPE. IT IS CARRIED OUT IN A BLOCK OF SOLID MATERIAL OF LOW THERMAL EXPANSION COEFFICIENT, AND IN WHICH IS FORMED AN UNPROPAGATION PATH PRODUCING A FIRST FREQUENCY SEPARATION. A SECOND FREQUENCY SEPARATION IS PROVIDED BY A FARADAY ROTATOR INCLUDING A THIN BLOCK OF RARE-EARTH DOPED GLASS IN A PERMANENT MAGNET OPENING. AN OUTPUT DETECTOR DELIVERS SIGNALS THE FREQUENCY OF WHICH IS PROPORTIONAL TO THE ROTATION SPEED OF THE GYROSCOPE. APPLICATIONS TO NAVIGATION.

FR7836927A 1978-01-03 1978-12-29 LASER GYROSCOPE Granted FR2413635A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86809678A 1978-01-03 1978-01-03

Publications (2)

Publication Number Publication Date
FR2413635A1 true FR2413635A1 (en) 1979-07-27
FR2413635B1 FR2413635B1 (en) 1984-09-14

Family

ID=25351066

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7836927A Granted FR2413635A1 (en) 1978-01-03 1978-12-29 LASER GYROSCOPE

Country Status (7)

Country Link
JP (1) JPS5498195A (en)
CA (1) CA1116279A (en)
DE (1) DE2900125A1 (en)
FR (1) FR2413635A1 (en)
GB (1) GB2012101B (en)
IT (1) IT1113711B (en)
NL (1) NL189980C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989009925A1 (en) * 1988-04-14 1989-10-19 Litton Systems Inc. Scatter symmetrization in multi-mode ring laser gyros
FR2729753A1 (en) * 1988-07-29 1996-07-26 Litton Systems Inc Ring laser gyroscope contg magnetic sources

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471583A1 (en) * 1979-12-14 1981-06-19 Thomson Csf METHOD AND DEVICE FOR MODULATING THE WAVE PHASE CIRCULATING IN A RING INTERFEROMETER
CA1189600A (en) * 1980-10-17 1985-06-25 Raytheon Company Dispersion equalized ring laser gyroscope
US4397027A (en) * 1981-01-05 1983-08-02 Raytheon Company Self-compensating gas discharge path for laser gyro
GB2120839A (en) * 1982-05-19 1983-12-07 Raytheon Co Ring laser gyroscope
US4616930A (en) * 1983-04-20 1986-10-14 Litton Systems, Inc. Optically biased twin ring laser gyroscope
JPS6068684A (en) * 1983-09-26 1985-04-19 Fujitsu Ltd Laser light source
GB2184285B (en) * 1983-11-07 1990-08-01 Raytheon Co Ring laser gyroscope
US4578793A (en) * 1984-07-13 1986-03-25 The Board Of Trustees Of The Leland Stanford Junior University Solid-state non-planar internally reflecting ring laser

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245314A (en) * 1962-06-28 1966-04-12 Bell Telephone Labor Inc Optical rotation devices employing a ferromagnetic chromium trihalide
FR2128617A1 (en) * 1971-03-03 1972-10-20 Raytheon Co
FR2193193A1 (en) * 1972-07-17 1974-02-15 Rockwell International Corp
US3841758A (en) * 1972-09-28 1974-10-15 J Gievers Rotation sensitive retarder
DE2432479A1 (en) * 1974-07-04 1976-01-22 Sperry Rand Corp Ring-type gas laser - with plane polarised waves in closed loop contg. mirror with magnetically saturable section

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3373650A (en) * 1965-04-02 1968-03-19 Honeywell Inc Laser angular rate sensor
JPS5045904Y2 (en) * 1972-06-07 1975-12-25
JPS4940557A (en) * 1972-08-16 1974-04-16
JPS5146340B2 (en) * 1972-12-12 1976-12-08
JPS5349629Y2 (en) * 1974-10-02 1978-11-29
CA1077602A (en) * 1976-01-02 1980-05-13 Raytheon Company Electromagnetic wave ring resonator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245314A (en) * 1962-06-28 1966-04-12 Bell Telephone Labor Inc Optical rotation devices employing a ferromagnetic chromium trihalide
FR2128617A1 (en) * 1971-03-03 1972-10-20 Raytheon Co
FR2193193A1 (en) * 1972-07-17 1974-02-15 Rockwell International Corp
US3841758A (en) * 1972-09-28 1974-10-15 J Gievers Rotation sensitive retarder
DE2432479A1 (en) * 1974-07-04 1976-01-22 Sperry Rand Corp Ring-type gas laser - with plane polarised waves in closed loop contg. mirror with magnetically saturable section

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989009925A1 (en) * 1988-04-14 1989-10-19 Litton Systems Inc. Scatter symmetrization in multi-mode ring laser gyros
FR2729753A1 (en) * 1988-07-29 1996-07-26 Litton Systems Inc Ring laser gyroscope contg magnetic sources

Also Published As

Publication number Publication date
IT1113711B (en) 1986-01-20
GB2012101B (en) 1982-04-21
JPH0321889B2 (en) 1991-03-25
DE2900125C2 (en) 1993-04-01
FR2413635B1 (en) 1984-09-14
IT7947511A0 (en) 1979-01-02
NL7812668A (en) 1979-07-05
JPS5498195A (en) 1979-08-02
NL189980B (en) 1993-04-16
DE2900125A1 (en) 1979-07-12
NL189980C (en) 1993-09-16
CA1116279A (en) 1982-01-12
GB2012101A (en) 1979-07-18

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Legal Events

Date Code Title Description
ST Notification of lapse