Sagnactyyppiset
Sagnactyyppiset refer to devices that exploit the Sagnac effect to measure rotation. They use a closed optical path in which light travels in opposite directions; rotation causes a travel-time and phase difference between the counter-propagating beams, yielding an interference signal or beat frequency proportional to angular velocity.
The effect arises from the dependence Δt = 4AΩ/c^2 for a loop of area A, with corresponding phase
The two predominant implementations are ring laser gyroscopes (RLG) and fiber-optic gyroscopes (FOG). RLGs employ a
Sagnactyyppiset devices are used in inertial navigation systems for aircraft, ships, submarines, spacecraft, and handheld devices,
Common limitations involve bias drift and scale-factor nonlinearities, temperature sensitivity, mechanical perturbations, and backscattering in the