Method and arrangement for measuring absolute rotations

摘要: The method, known per se, of a Sagnac ring interferometer for measuring rotation is modified in that phase shifter arranged at each end the annular light path. These shifters are operated push-pull mode. They thus simulate an imaginary rate which connected essentially linearly to speed change optical phases rotating This utilised order compensate actual be measured. For accurate evaluation rotation, shifts alternately rise and drop over time case one such variable produced by means way compensation always occurs. difference rising states falling strictly proportional rotation.