GB1269104A - A laser gyroscopic device - Google Patents

A laser gyroscopic device

Info

Publication number
GB1269104A
GB1269104A GB5429269A GB5429269A GB1269104A GB 1269104 A GB1269104 A GB 1269104A GB 5429269 A GB5429269 A GB 5429269A GB 5429269 A GB5429269 A GB 5429269A GB 1269104 A GB1269104 A GB 1269104A
Authority
GB
United Kingdom
Prior art keywords
laser
mirror
coil
axis
support
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.)
Expired
Application number
GB5429269A
Inventor
Shogo Yoshikawa
Masatoshi Terai
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.)
Nippon Selfoc Co Ltd
Original Assignee
Nippon Selfoc Co Ltd
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 Nippon Selfoc Co Ltd filed Critical Nippon Selfoc Co Ltd
Publication of GB1269104A publication Critical patent/GB1269104A/en
Expired 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
    • 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
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • 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
    • 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
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/0915—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light
    • H01S3/092—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of flash lamp
    • H01S3/093—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of flash lamp focusing or directing the excitation energy into the active medium

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Lasers (AREA)
  • Gyroscopes (AREA)
  • Laser Surgery Devices (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

1,269,104. Laser gyroscope. NIPPON SELFOC CO. Ltd. 5 Nov., 1969 [16 Nov., 1968], No. 54292/69. Heading H4D. [Also in Division H1] A laser gyroscopic device includes a fibre-like laser element 1 of a material having a refractive index which is greatest at the axis and decreases in proportion to the square of the radial distance to the axis, the element being formed into a helical coil; a light power source 2; a semitransparent mirror 4 arranged opposite the ends of the laser element 1 such that light rays emanating from either end surface are directed to the other end surface and means 6 for detecting any frequency difference between the two rays emanating from the two end surfaces and passing through the mirror 4. The element 1 which has a laser active material within the glass or transparent synthetic resin host material acts as a converging light guide and is mounted on a transparent support (not shown) inside a cylindrical reflector 3. The element 1, mirror 4, and detector 6 are mounted on a support (not shown) rotable about the primary axis of the coil. Excitation of the laser element I produces waves travelling both clockwise and anti-clockwise around the coil 1, the mirror 4 completing the resonant path. Any rotation of the support produces a frequency difference between the two waves which is detected by detector 6.
GB5429269A 1968-11-16 1969-11-05 A laser gyroscopic device Expired GB1269104A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8368468A JPS497636B1 (en) 1968-11-16 1968-11-16

Publications (1)

Publication Number Publication Date
GB1269104A true GB1269104A (en) 1972-04-06

Family

ID=13809299

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5429269A Expired GB1269104A (en) 1968-11-16 1969-11-05 A laser gyroscopic device

Country Status (5)

Country Link
JP (1) JPS497636B1 (en)
DE (1) DE1955911C3 (en)
FR (1) FR2023465A1 (en)
GB (1) GB1269104A (en)
NL (1) NL6917051A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039260A (en) * 1976-03-22 1977-08-02 Redman Charles M Rotational motion transducer
US4138196A (en) * 1977-07-06 1979-02-06 The United States Of America As Represented By The Secretary Of The Army Fiber interferometer rotary motion sensor
FR2431131A1 (en) * 1978-07-10 1980-02-08 Thomson Csf FIBER OPTIC INTERFEROMETRIC GYROMETER
JPS568712A (en) * 1979-06-29 1981-01-29 Nissan Motor Co Ltd Heater unit structure in car air-conditioner
DE3533687A1 (en) * 1985-09-21 1987-03-26 Teldix Gmbh DEVICE FOR MEASURING THE SPEED

Also Published As

Publication number Publication date
FR2023465A1 (en) 1970-08-21
DE1955911C3 (en) 1974-04-04
DE1955911B2 (en) 1973-09-06
JPS497636B1 (en) 1974-02-21
NL6917051A (en) 1970-05-20
DE1955911A1 (en) 1970-11-12

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