| 摘要 |
A tilt mirror dither for a ring laser gyro to eliminate lock-in at low rates of rotation. The tilt mirror dither includes means (36, 38) for vibrating two of the ring laser gyro mirrors (30, 28), each in a rotational mode about an axis to tilt the mirrors back and forth, the mirrors being vibrated at the same frequency but 180<o> out of phase to maintain the path length of the laser beams constant. In one embodiment (Fig. 2A) an up-down tilt mirror dither is provided and in another embodiment (Fig. 2B) a side-to-side tilt mirror dither is provided. |
