Performance of a modal zone wavefront recovery algorithm (Hudgin) implemented on FPGAs for its use in ELTs

José Javier Díaz-García; Alberto Dávila-González; Luis-Fernando Rodríguez-Ramos; José-Manuel Rodríguez-Ramos; Yolanda Martín-Hernando; Juan-José Piqueras-Meseguer

doi:10.1117/12.829100

17 September 2009 Performance of a modal zone wavefront recovery algorithm (Hudgin) implemented on FPGAs for its use in ELTs

José Javier Díaz-García, Alberto Dávila-González, Luis-Fernando Rodríguez-Ramos, José-Manuel Rodríguez-Ramos, Yolanda Martín-Hernando, Juan-José Piqueras-Meseguer

Author Affiliations +

Proceedings Volume 7439, Astronomical and Space Optical Systems; 74390K (2009) https://doi.org/10.1117/12.829100
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

The use of AO in Extremely Large Telescopes, used to improve performances in smaller telescopes, becomes now mandatory to achieve diffraction limited images according to the large apertures. On the other hand, the new dimensions push the specifications of the AO systems to new frontiers where the order of magnitude in terms of computation power, time response and the required numbers of actuators impose new challenges to the technology. In some aspects implementation methods used in the past result no longer applicable. This paper examines the real dimension of the problem imposed by ELTs and shows the results obtained in the laboratory for a real modal wavefront recovery algorithm (Hudgin) implemented in FPGAs. Some approximations are studied and the performances in terms of configuration parameters are compared. Also a preferred configuration will be justified.

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José Javier Díaz-García, Alberto Dávila-González, Luis-Fernando Rodríguez-Ramos, José-Manuel Rodríguez-Ramos, Yolanda Martín-Hernando, and Juan-José Piqueras-Meseguer "Performance of a modal zone wavefront recovery algorithm (Hudgin) implemented on FPGAs for its use in ELTs", Proc. SPIE 7439, Astronomical and Space Optical Systems, 74390K (17 September 2009); https://doi.org/10.1117/12.829100

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