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Title: Method for removing tilt control in adaptive optics systems

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: G'=(I-X(X.sup.T X).sup.-1 X.sup.T)G(I-A)

Inventors:
 [1]
  1. (Livermore, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
871512
Patent Number(s):
5745309
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; removing; tilt; control; adaptive; optics; systems; operation; whereby; removes; steps; steering; mirror; steer; wavefront; desired; direction; aiming; impinging; aberrated; light; beam; deformable; surface; deformed; selectively; means; plurality; actuators; compensates; partially; existing; aberrations; split; output; sample; sampled; sensor; signals; converted; corresponding; electrical; driving; controller; drives; feedback; loop; response; compensating; purpose; displacement; error; gradient; measured; adjusted; modified; matrix; satisfies; following; equation; i-x; -1; i-a; deformable mirror; wavefront sensor; feedback loop; electrical signals; output beam; electrical signal; light beam; sample beam; steering mirror; corresponding electrical; sampled signal; method removes; desired direction; tilt control; adaptive optics; /359/250/356/

Citation Formats

Salmon, Joseph Thaddeus. Method for removing tilt control in adaptive optics systems. United States: N. p., 1998. Web.
Salmon, Joseph Thaddeus. Method for removing tilt control in adaptive optics systems. United States.
Salmon, Joseph Thaddeus. Thu . "Method for removing tilt control in adaptive optics systems". United States. https://www.osti.gov/servlets/purl/871512.
@article{osti_871512,
title = {Method for removing tilt control in adaptive optics systems},
author = {Salmon, Joseph Thaddeus},
abstractNote = {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: G'=(I-X(X.sup.T X).sup.-1 X.sup.T)G(I-A)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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