Method for removing tilt control in adaptive optics systems

Salmon, Joseph Thaddeus

Title: Method for removing tilt control in adaptive optics systems

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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:

Salmon, Joseph Thaddeus ^[1]

Livermore, CA

Issue Date:: 1998-01-01

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)

Patent Classifications (CPCs):: Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS

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Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S359/90 - Methods

G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
G02B26/06 - for controlling the phase of light

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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/

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                    Salmon, Joseph Thaddeus. Method for removing tilt control in adaptive optics systems.  United States: N. p., 1998. 
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                    Salmon, Joseph Thaddeus. Method for removing tilt control in adaptive optics systems.  United States.

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                    Salmon, Joseph Thaddeus. Thu .  
        "Method for removing tilt control in adaptive optics systems".  United States.  https://www.osti.gov/servlets/purl/871512.

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@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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