Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams

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Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects > Turn-sensitive devices without moving masses > Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams

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• G01C 19/66 Ring laser gyrometers
• G01C 19/72 with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers