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Phase retrieval using a genetic algorithm on the systematic image-based optical alignment testbed
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Taylor, Jaime R. |
| Copyright Year | 2003 |
| Description | NASA s Marshall Space Flight Center s Systematic Image-Based Optical Alignment (SIBOA) Testbed was developed to test phase retrieval algorithms and hardware techniques. Individuals working with the facility developed the idea of implementing phase retrieval by breaking the determination of the tip/tilt of each mirror apart from the piston motion (or translation) of each mirror. Presented in this report is an algorithm that determines the optimal phase correction associated only with the piston motion of the mirrors. A description of the Phase Retrieval problem is first presented. The Systematic Image-Based Optical Alignment (SIBOA) Testbeb is then described. A Discrete Fourier Transform (DFT) is necessary to transfer the incoming wavefront (or estimate of phase error) into the spatial frequency domain to compare it with the image. A method for reducing the DFT to seven scalar/matrix multiplications is presented. A genetic algorithm is then used to search for the phase error. The results of this new algorithm on a test problem are presented. |
| File Size | 291464 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20030093592 |
| Archival Resource Key | ark:/13960/t26b23d1h |
| Language | English |
| Publisher Date | 2003-04-01 |
| Access Restriction | Open |
| Subject Keyword | Pistons Fourier Transformation Optical Equipment Phase Error Mirrors Genetic Algorithms Wave Fronts Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
