Deformable mirror with dither

Details Deformable mirror with dither Deformable mirror with dither

1979-09-04

1981-10-20

Henry, Jon W.

350295, 350289, G02B 718, G02B 508

Patent

active

042957109

ABSTRACT:
A multi-actuator deformable mirror and control system which comprises a copper-surfaced, aluminum faceplate supported by a flexure strut attached to an aluminum-backed structure and actuated by nineteen differential ball screw mirror actuator assemblies. The actuators are driven directly by direct current stepping motors capable of 400 steps/rev when operating in "half step" mode. A 10.mu. meter per revolution differential pitch in the screw provides a resolution of 1.mu. inch per motor step. An alternating current dither actuator comprising a plurality of piezo-ceramic elements is connected one each in series with said actuator assemblies for providing both tagging and real time dynamic corrections.

REFERENCES:
patent: 3880500 (1975-04-01), Kojabashian
patent: 4060314 (1977-11-01), Heinz
Hardy, John W., Active Optics: A New Technology . . . Proc. of the IEEE, vol. 66, No. 6, Jun., 1978.

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