Method for removing tilt control in adaptive optics systems

Details Method for removing tilt control in adaptive optics systems Method for removing tilt control in adaptive optics systems

1997-03-25

1998-04-28

Shafer, Ricky D.

Optical: systems and elements

Mirror

Including specified control or retention of the shape of a...

359849, 359900, 356121, 2502019, G02B 508, G02B 7182, G01J 100, G01J 120

Patent

active

057453098

ABSTRACT:
A new adaptive optics system and method of operation, whereby the method removes tilt control, and includes the steps of using a steering mirror to steer a wavefront in the desired direction, for aiming an impinging aberrated light beam in the direction of a deformable mirror. The deformable mirror has its surface deformed selectively by means of a plurality of actuators, and compensates, at least partially, for existing aberrations in the light beam. The light beam is split into an output beam and a sample beam, and the sample beam is sampled using a wavefront sensor. The sampled signals are converted into corresponding electrical signals for driving a controller, which, in turn, drives the deformable mirror in a feedback loop in response to the sampled signals, for compensating for aberrations in the wavefront. To this purpose, a displacement error (gradient) of the wavefront is measured, and adjusted by a modified gain matrix, which satisfies the following equation:

REFERENCES:
patent: 4141652 (1979-02-01), Feinleib
patent: 4326800 (1982-04-01), Fitts
patent: 4724404 (1988-02-01), Cochran
patent: 5287165 (1994-02-01), Ulich et al.

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