Publications (2)0 Total impact
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Craig Mackay,
Rafael Rebolo-López,
Bruno Femenia Castellá,
Jonathan Crass,
David L. King,
Lucas Labadie, Peter Aisher,
Antonio Pérez Garrido,
Marc Balcells,
Anastasio Díaz-Sánchez,
Jesús Jimenez Fuensalida,
Roberto L. Lopez,
Alejandro Oscoz,
Jorge A. Pérez Prieto,
Luis F. Rodríguez-Ramos,
Isidro Villó
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ABSTRACT: The highest resolution images ever taken in the visible were obtained by
combining Lucky Imaging and low order adaptive optics. This paper describes a
new instrument to be deployed on the WHT 4.2m and GTC 10.4 m telescopes on La
Palma, with particular emphasis on the optical design and the expected system
performance. A new design of low order wavefront sensor using photon counting
CCD detectors and multi-plane curvature wavefront sensor will allow
dramatically fainter reference stars to be used, allowing virtually full sky
coverage with a natural guide star. This paper also describes a significant
improvements in the efficiency of Lucky Imaging, important advances in
wavefront reconstruction with curvature sensors and the results of simulations
and sensitivity limits. With a 2 x 2 array of 1024 x 1024 photon counting
EMCCDs, AOLI is likely to be the first of the new class of high sensitivity,
near diffraction limited imaging systems giving higher resolution in the
visible from the ground than hitherto been possible from space.
07/2012;
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Jonathan Crass, Peter Aisher,
Bruno Femenia,
David L. King,
Craig D. Mackay,
Rafael Rebolo-López,
Lucas Labadie,
Antonio Pérez Garrido,
Marc Balcells,
Anastasio Díaz Sánchez,
Jesús Jimenez Fuensalida,
Roberto L. Lopez,
Alejandro Oscoz,
Jorge A. Pérez Prieto,
Luis F. Rodríguez-Ramos,
Isidro Villó
[show abstract]
[hide abstract]
ABSTRACT: The Adaptive Optics Lucky Imager (AOLI) is a new instrument under development
to demonstrate near diffraction limited imaging in the visible on large
ground-based telescopes. We present the adaptive optics system being designed
for the instrument comprising a large stroke deformable mirror, fixed component
non-linear curvature wavefront sensor and photon-counting EMCCD detectors. We
describe the optical design of the wavefront sensor where two photoncounting
CCDs provide a total of four reference images. Simulations of the optical
characteristics of the system are discussed, with their relevance to low and
high order AO systems. The development and optimisation of high-speed wavefront
reconstruction algorithms are presented. Finally we discuss the results of
simulations to demonstrate the sensitivity of the system.
07/2012;
