Angular velocity sensor based on a ring laser

Details Angular velocity sensor based on a ring laser Angular velocity sensor based on a ring laser

1981-03-09

1984-02-21

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

044326467

ABSTRACT:
An angular velocity sensor based on a ring laser, wherein at any given time beam components of oppositely directed wave trains can be decoupled, having photo-receivers for the decoupled beam components, and means for the generation of signals which correspond to intensity differences of the decoupled beam components. In accordance with the invention a photo-receiver is provided for each decoupled beam and detector means is provided to analyze the output signals from the photo-receivers both for amplitude and frequency. The detector means may consist of a subtractor, a pulse-former and a counter. A rotation-direction detector may also receive an output signal from the pulse-former and feed this as a plus or minus sign into the counter.

REFERENCES:
"Amplitude & Frequency Characteristics of a Ring Laser", Hutchings et al., hysical Review, vol. 152, No. I, Dec. 2, 1966, pp. 467-473.
"Measurements of a Mode-Competition Discriminant in a Single Frequency Argon Ion Ring Laser", Maloney et al., IEEE J. of Quantum Electronics, vol. QE-8, No. 9, Sep. 1972, pp. 744-749.

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