Fast hardware implementation of tomography for multi-guidestar adaptive optics

Donald Gavel; Marc Reinig; Carlos Cabrera

doi:10.1117/12.618430

25 August 2005 Fast hardware implementation of tomography for multi-guidestar adaptive optics

Donald Gavel, Marc Reinig, Carlos Cabrera

Proceedings Volume 5903, Astronomical Adaptive Optics Systems and Applications II; 59030F (2005) https://doi.org/10.1117/12.618430
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

An adaptive optics system using multiple deformable mirrors and an array of guidestars can correct over a wider field of view than traditional single DM systems and can also eliminate the cone-effect error due to the finite altitude of laser guidestars. In large telescope systems, such as the envisioned 30-meter telescope, or TMT, the extraordinarily large amount of computation needed to implement multi-conjugate adaptive optics at atmospheric turnover rates is prohibitive for ordinary CPUs, even when another ten years of computer development is taken into account. We present here a novel approach, implementing a fast iterative version of the key inverse tomography calculations in an array of parallel computing elements. Our initial laboratory experiments using field-programmable gate arrays (FPGAs) are promising in terms of speed and convergence rates. In this paper we present the theory and results from simulations and experiments.

Citation Download Citation

Donald Gavel, Marc Reinig, and Carlos Cabrera "Fast hardware implementation of tomography for multi-guidestar adaptive optics", Proc. SPIE 5903, Astronomical Adaptive Optics Systems and Applications II, 59030F (25 August 2005); https://doi.org/10.1117/12.618430

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available