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dc.contributor.advisorCristi, Roberto
dc.contributor.authorAxtell, Travis W.
dc.dateJun-14
dc.date.accessioned2014-08-13T20:17:22Z
dc.date.available2014-08-13T20:17:22Z
dc.date.issued2014-06
dc.identifier.urihttp://hdl.handle.net/10945/42576
dc.description.abstractThe problem of wavefront reconstruction is important in high precision optical systems, such as astronomical telescopes, where it is used to estimate the distortion of the collected light caused by the atmosphere and corrected by adaptive optics. A generalized orthogonal wavelet wavefront reconstruction algorithm is presented in this research for use with gradient measurements from a Shack- Hartmann wavefront sensor. This algorithm can be implemented using a number of different wavelets for improved performance in the presence of noise. An extension of this algorithm is also presented to provide wavefront estimation in the presence of isolated branch points where the phase is undetermined. The wavefront is obtained by augmenting the wrapped observations with a filtered curl of the vector field. The wavefront estimation can then be used for surface control of a deformable mirror. A third contribution is in deformable mirror surface control. The control signals to a deformable mirror are computed that minimize the wavefront error using constrained optimization to ensure that the hardware actuator voltage limits are satisfied. A sequence of optimal solutions is used to verify the linear model of a deformable mirror. A multigrid approach to the optimization problem is shown to improve computation efficiency.en_US
dc.description.urihttp://archive.org/details/wavefrontreconst1094542576
dc.publisherMonterey, California: Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleWavefront reconstruction and mirror surface optimization for adaptive opticsen_US
dc.typeThesisen_US
dc.contributor.departmentElectrical and Computer Engineering
dc.subject.authorWavefront reconstructionen_US
dc.subject.authorAdaptive opticsen_US
dc.subject.authorWaveletsen_US
dc.subject.authorAtmospheric turbulenceen_US
dc.subject.authorBranch pointsen_US
dc.subject.authorMirror surface optimizationen_US
dc.subject.authorSpace telescopeen_US
dc.subject.authorSegmented mirroren_US
etd.thesisdegree.nameDoctor of Philosophy In Electrical Engineeringen_US
etd.thesisdegree.levelDoctoralen_US
etd.thesisdegree.disciplineElectrical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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