Patent ID: 6654126
Filing Date: 2003-11-25
Classification: G01C,H01S

Abstract:
An angular velocity detecting apparatus comprising:an optical gyro having a terminal for detecting any change in at least one of an electric current, a voltage and an impedance in a ring laser, wherein said ring laser includes a tapered light waveguide of an asymmetrical shape in at least a portion of a light waveguide so that the oscillation threshold values of laser beams propagating round in opposite directions of rotation may differ from each other; a measuring device which measures cycle of the change in at least one of the electric current, the voltage and the impedance outputted from the terminal of said optical gyro; a clock generation device which generates a predetermined clock for sampling; and a calculation circuit to which is inputted data measured by said measuring device at a predetermined sampling cycle in accordance with the predetermined clock for sampling from said clock generation device, and which performs calculation on information regarding an angular velocity on the basis of the result of the measurement; the predetermined sampling cycle generated by said clock generation device being longer than the cycle of the change in at least one of the electric current, the voltage and the impedance produced by said optical gyro within the necessary range for the detection of the angular velocity.