Tip/Tilt point spread function reconstruction for laser guide star multi conjugate adaptive optics

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DOIResolve DOI: http://doi.org/10.1117/12.926928
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TypeArticle
Proceedings titleAdaptive Optics Systems III
Series titleProceedings of SPIE; Volume 8447
ConferenceAdaptive Optics Systems III, 1 July 2012 through 6 July 2012, Amsterdam
ISSN0277-786X
ISBN9780819491480
Article number844729
SubjectAnisoplanatism; Capture error; Experimental validations; High-order; Multi-conjugate adaptive optics systems; Natural guide star; Point spread function reconstruction; Post processing; Simulation model; Thirty Meter Telescope; Wave front sensors; Algorithms; Atmospheric turbulence; Computer simulation; Covariance matrix; Lasers; Optical transfer function; Sensors; Stars; Wavefronts
AbstractIn adaptive optics systems employing laser guide stars, the tip/tilt contribution to the long exposure point spread function must be estimated separately from the high-order tip/tilt removed point spread function because this component is estimated separately from a single or multiple low-order natural guide star wavefront sensors. This paper investigates this problem for laser guide star multi conjugate adaptive optics. The approach is based on the scheme developed by Flicker in 2003 [1], and consists in post-processing the measurement covariance matrix of multiple low-order natural guide star wavefront sensors controlling tip/tilt and tilt anisoplanatism. An innovative simulation model based "balanced" algorithm is introduced to capture error terms not accounted for in Flicker's algorithm. Sample enclosed energy results for the Thirty Meter Telescope multi conjugate adaptive optics system demonstrate the superiority of the balanced method and call for further analytical work and experimental validation.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Science Infrastructure
Peer reviewedYes
NPARC number21270298
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Record identifiercbc826b5-7c30-4dd3-be4a-978f43497eda
Record created2014-01-22
Record modified2017-09-13
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