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

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

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1543..460j&link_type=abstract

Proc. SPIE Vol. 1543, p. 460-471, Active and Adaptive Optical Components, Mark A. Ealey; Ed.

Computer Science

Performance

Scientific paper

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.

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