Title

Reduction Of Anisoplanatic Errors

Date of Award

1981

Degree Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Electrical Engineering and Computer Science

Advisor(s)

Nathan Schwartz

Keywords

Electrical engineering

Subject Categories

Electromagnetics and Photonics

Abstract

The potential of reducing anisoplanatic errors in adaptive optical systems through the use of estimation theory is studied. Currently, anisoplanatic errors place a fundamental limit on the performance of adaptive optical systems.

Due to the ill-behaved nature of the random processes involved, the estimation procedure is formulated in terms of the structure and hyperstructure functions. These functions are widely used in the literature dealing with turbulence and optical propagation through turbulence. A particular turbulence profile is chosen to evaluate the performance of the estimation procedure. A reasonable reduction in the anisoplanatic error is obtained through use of the estimation procedure. Only signals which are currently available in adaptive optical systems are required to implement the estimation procedure, no a priori knowledge is required.

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