Physics – Optics
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990opten..29.1165t&link_type=abstract
Optical Engineering (ISSN 0091-3286), vol. 29, Oct. 1990, p. 1165-1173.
Physics
Optics
4
Adaptive Optics, Atmospheric Correction, Atmospheric Turbulence, Spatial Filtering, Thermal Blooming, Least Squares Method, Mirrors, Signal To Noise Ratios, Wave Fronts
Scientific paper
Analysis of adaptive optics system behavior often can be reduced to a few approximations and scaling laws. For atmospheric turbulence correction, the deformable mirror (DM) fitting error is most often used to determine a priori the interactuator spacing and the total number of correction zones required. This paper examines the mirror fitting error in terms of its most commonly used exponential form. The explicit constant in the error term is dependent on deformable mirror influence function shape and actuator geometry. The method of least squares fitting of discrete influence functions to the turbulent wavefront is compared to the linear spatial filtering approximation of system performance. It is found that the spatial filtering method overstimates the correctability of the adaptive optics system by a small amount. By evaluating fitting error for a number of DM configurations, actuator geometries, and influence functions, fitting error constants verify some earlier investigations.
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