Accession Number:

ADA243966

Title:

Performance Analysis of the Speckle Holography Image Reconstruction Technique

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

• VonNiederhausern, Rudolf N.

Report Date:

1991-12-01

Pagination or Media Count:

82.0

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 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.

Descriptors:

• *COMPUTER PROGRAMS
• SPATIAL DISTRIBUTION
• MEASUREMENT
• RATIOS
• HIGH FREQUENCY
• TRANSFER FUNCTIONS
• DETECTORS
• PERFORMANCE TESTS
• PARAMETERS
• PROCESSING
• HOLOGRAPHY
• DIFFRACTION
• LIMITATIONS
• NOISE
• LOW FREQUENCY
• WAVEFRONTS
• SPECULAR REFLECTION
• ALGORITHMS

Subject Categories:

• Holography
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE