Document Detail

Tilt Estimation in Moderate-to-Strong Scintillation.
MedLine Citation:
PMID:  18357314     Owner:  NLM     Status:  In-Data-Review    
Adaptive optics systems are being applied in ever more challenging environments, for example, the projection of lasers over long horizontal paths through the atmosphere. These long atmospheric paths corrupt the signal received from the beacon and typically yield highly scintillated received wave fronts. Tilt estimation for controlling the fast steering mirror in these systems is complicated by the presence of branch points in the scintillated received wave fronts. In particular, correlation between the tilt and the projected beam's centroid error at the target has been observed in horizontal laser beam projection experiments. The presence of this correlation indicates that better tracking performance should be achievable. We compare the performance of four estimation schemes applied to tilt estimation in a horizontal laser projection system. It is demonstrated that all four schemes underestimate the tilt required to return the laser beam to a target in highly scintillated environments. A method of correcting this tilt is presented, and the expected performance improvement is quantified.
J B Burl; M C Roggemann; B Welsh
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Applied optics     Volume:  40     ISSN:  0003-6935     ISO Abbreviation:  Appl Opt     Publication Date:  2001 Jun 
Date Detail:
Created Date:  2008-03-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0247660     Medline TA:  Appl Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2966-72     Citation Subset:  -    
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