1 December 1991 Performance tests of a 1500 degree-of-freedom adaptive optics system for atmospheric compensation
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Abstract
Results from a benchtop experiment to demonstrate phase compensation using a 512 segment, 1500 degree-of-freedom adaptive optic system are presented. Atmospheric phase distortion is simulated by a static Kolmogorov spectrum aberration plate with r0 equal to the subaperture size. The phase gradients are measured using a Poisson-limited, self-referenced shearing interferometer which operated at two distinct shear lengths. A parallel processor is then employed utilizing a sparse matrix multiply to reconstruct the phase front in realtime. The performance of the compensation was determined by measuring the normalized half lambda/D intensity ratio in the Fourier transform plane. Corrections to a Strehl ratio of 0.55 were performed, consistent with the measured sensitivity of the system.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Edward Louis Cuellar, Edward Louis Cuellar, Paul A. Johnson, Paul A. Johnson, David G. Sandler, David G. Sandler, } "Performance tests of a 1500 degree-of-freedom adaptive optics system for atmospheric compensation", Proc. SPIE 1542, Active and Adaptive Optical Systems, (1 December 1991); doi: 10.1117/12.48830; https://doi.org/10.1117/12.48830
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