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Title: Method for removing tilt control in adaptive optics systems

Abstract

A new adaptive optics system and method of operation are disclosed, 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: G{prime} = (I{minus}X(X{sup T} X){sup {minus}1}X{sup T})G(I{minus}A). 3 figs.

Inventors:
Issue Date:
Research Org.:
Univ. of California (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
644424
Patent Number(s):
5745309
Application Number:
PAN: 8-823,706
Assignee:
Dept. of Energy, Washington, DC (United States)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 28 Apr 1998
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; OPTICAL SYSTEMS; OPERATION; POSITIONING; ACTUATORS; DESIGN; BEAM SPLITTING; BEAM OPTICS; ELECTRIC CONTROLLERS

Citation Formats

Salmon, J T. Method for removing tilt control in adaptive optics systems. United States: N. p., 1998. Web.
Salmon, J T. Method for removing tilt control in adaptive optics systems. United States.
Salmon, J T. Tue . "Method for removing tilt control in adaptive optics systems". United States.
@article{osti_644424,
title = {Method for removing tilt control in adaptive optics systems},
author = {Salmon, J T},
abstractNote = {A new adaptive optics system and method of operation are disclosed, 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: G{prime} = (I{minus}X(X{sup T} X){sup {minus}1}X{sup T})G(I{minus}A). 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {4}
}