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Genetic Algorithm Phase Retrieval for the Systematic Image-Based Optical Alignment TestbedPhase retrieval requires calculation of the real-valued phase of the pupil fimction from the image intensity distribution and characteristics of an optical system. Genetic 'algorithms were used to solve two one-dimensional phase retrieval problem. A GA successfully estimated the coefficients of a polynomial expansion of the phase when the number of coefficients was correctly specified. A GA also successfully estimated the multiple p h e s of a segmented optical system analogous to the seven-mirror Systematic Image-Based Optical Alignment (SIBOA) testbed located at NASA s Marshall Space Flight Center. The SIBOA testbed was developed to investigate phase retrieval techniques. Tiphilt and piston motions of the mirrors accomplish phase corrections. A constant phase over each mirror can be achieved by an independent tip/tilt correction: the phase Conection term can then be factored out of the Discrete Fourier Tranform (DFT), greatly reducing computations.
Document ID
20030067392
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Taylor, Jaime
(Austin Peay State Univ. Clarksville, TN, United States)
Rakoczy, John
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Steincamp, James
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 9, 2003
Subject Category
Optics
Meeting Information
Meeting: Genetic and Evolutionary Conference
Location: Chicago, IL
Country: United States
Start Date: July 12, 2003
End Date: July 16, 2003
Distribution Limits
Public
Copyright
Public Use Permitted.
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