Real-time wavefront reconstruction for a 512-subaperture adaptive      optical system

Paul A. Johnson; Richard G. Trissel; Edward Louis Cuellar; Robert L. Arnold; David G. Sandler

doi:10.1117/12.51201

13 January 1992 Real-time wavefront reconstruction for a 512 subaperture adaptive optical system

Paul A. Johnson, Richard G. Trissel, Edward Louis Cuellar, Robert L. Arnold, David G. Sandler

Proceedings Volume 1543, Active and Adaptive Optical Components; (1992) https://doi.org/10.1117/12.51201
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

This paper describes a system capable of real-time wavefront reconstruction for a 512 subaperture shearing interferometer. The system was designed to interface with a 1536 channel (512 segment) deformable mirror for atmospheric compensation using an artificial beacon. The phase gradients were measured using a shearing interferometer operating at two distinct shear lengths with quantum limited performance at 200 photons per subaperture. A 128 node parallel processor performed a sparse matrix multiply to reconstruct the phasefront in real time. The matrix truncation technique used allowed 90% of the elements to be removed with only minor penalty in wavefront accuracy.

Citation Download Citation

Paul A. Johnson, Richard G. Trissel, Edward Louis Cuellar, Robert L. Arnold, and David G. Sandler "Real-time wavefront reconstruction for a 512 subaperture adaptive optical system", Proc. SPIE 1543, Active and Adaptive Optical Components, (13 January 1992); https://doi.org/10.1117/12.51201

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