Patent ID: 7989756
Filing Date: 2011-08-02
Classification: G02B,G03F

Abstract:
1. An optical component, comprising: an optical element; at least three active-isolation mounts by which the optical element is mounted to a first frame; each active-isolation mount comprising a respective non-contacting actuator connecting a respective location on the optical element to the first frame and providing movability of the respective location relative to the frame in at least one direction; at least one displacement sensor associated with each respective location on the optical element, the displacement sensors being sensitive to displacement of the respective locations in at least one respective direction; and a servo-control loop to which the actuators and displacement sensors are connected, by which servo-control loop the optical-element displacement data, produced by the sensors, are compared to an absolute position reference to determine a positional disturbance being experienced by the optical element, and corrective energizations are determined to apply to the actuators to offset the disturbance.