Performance Analysis of the Speckle Holography Image Reconstruction Technique
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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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 r sub o atmospheric coherence diameter to the wave front sensor subaperture size. For a ratio of r sub o 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.