Date of Award

12-1991

Document Type

Thesis

Degree Name

Master of Science

Department

Department of Electrical and Computer Engineering

First Advisor

Byron M. Welsh, PhD

Abstract

In speckle holography, short exposures frames along with wave front measurements allow post processing image reconstruction. With speckle holography the amplitude of high spatial frequencies is boosted to allow resolution out to the diffraction limit of the telescope. To provide system parameters for the wave front sensor design, a software analysis program has been developed that provides the system transfer function as a function of the number and size of sensor subapertures and sensor noise. Trends in the ratio of the atmospheric coherence diameter to wave front subaperture size and the effect on the system transfer function have been obtained. Data obtained with the system transfer function algorithm depicts the criticality of the ratio of ro (atmospheric coherence diameter) to the wave front sensor subaperture size. For a ratio of ro to subaperture size of 2 to 1, the amplitude of high spatial frequencies are boosted to nearly 70% of the amplitude of lower spatial frequencies.

AFIT Designator

AFIT-GEO-ENG-91D-05

DTIC Accession Number

ADA243966

Comments

The author's Vita page is omitted.

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