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

Autor:	Paul A. Johnson, David G. Sandler, Robert L. Arnold, Richard G. Trissel, Edward Louis Cuellar
Rok vydání:	1992
Předmět:	Physics Wavefront Matrix (mathematics) Photon Optics business.industry Astrophysics::Instrumentation and Methods for Astrophysics Wavefront sensor business Adaptive optics Shearing interferometer Deformable mirror Sparse matrix
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.51201
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::308924976e11463d96b46081e784de95 https://doi.org/10.1117/12.51201 Zobrazit plný text záznamu