Apparatus and method for correcting ring laser gyroscope phase angle errors induced by lock-in
CA 1339667 C · Owner: Kanegsberg, Edward · Inventors: Hutchings, Thomas J.; Stjern, Daryl C.(Deceased); Hammons, Sheridan W.
Overview
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Phase errors that occur when a dithered ring laser gyroscope enters its deadband are measured, and a correction is applied to the output of the ring laser gyroscope to compensate for these phase errors. The counterpropagating beams in a ring laser gyroscope are heterodyned to produce a pair of quadrature heterodyne signals that indicate the angular output of the laser ring laser gyroscope. The phase angle error between one of the heterodyne signals and either the sum or difference of the separate beam intensities is determined. The phase angle error signal is used to produce a control signal for adjusting the output of the ring laser gyroscope to correct for errors introduced at or near …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 10, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 10, 2015.
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