Performance tests of a 1500 degree-of-freedom adaptive optics system for atmospheric compensation

Edward Louis Cuellar; Paul A. Johnson; David G. Sandler

doi:10.1117/12.48830

1 December 1991 Performance tests of a 1500 degree-of-freedom adaptive optics system for atmospheric compensation

Edward Louis Cuellar, Paul A. Johnson, David G. Sandler

Proceedings Volume 1542, Active and Adaptive Optical Systems; (1991) https://doi.org/10.1117/12.48830
Event: San Diego, '91, 1991, San Diego, CA, United States

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.

Citation Download Citation

Edward Louis Cuellar, Paul A. Johnson, and 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); https://doi.org/10.1117/12.48830

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