NAOS visible wavefront sensor

Philippe Feautrier; Pierre Y. Kern; Reinhold J. Dorn; Gerard Rousset; Patrick Rabou; Sylvain Laurent; Jean-Luis Lizon; Eric Stadler; Yves Magnard; Olivier Rondeaux; Matthieu Cochard; Didier Rabaud; Alain Delboulbe; Pascal Puget; Norbert N. Hubin

doi:10.1117/12.390321

7 July 2000 NAOS visible wavefront sensor

Philippe Feautrier, Pierre Y. Kern, Reinhold J. Dorn, Gerard Rousset, Patrick Rabou, Sylvain Laurent, Jean-Luis Lizon, Eric Stadler, Yves Magnard, Olivier Rondeaux, Matthieu Cochard, Didier Rabaud, Alain Delboulbe, Pascal Puget, Norbert N. Hubin

Author Affiliations +

Proceedings Volume 4007, Adaptive Optical Systems Technology; (2000) https://doi.org/10.1117/12.390321
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

Abstract

This paper describes the Visible Wave Front Sensor (visible WFS) for the VLT Nasmith Adaptive Optics system (NAOS). This Shack-Hartman-based wave front sensor instrument includes within a continuous flow liquid nitrogen cryostat: (1) a low noise fast readout CCD camera controlled by the ESO new generation CCD controller FIERA. The readout noise of this system is 3 e- at 50 kilopixel/sec/port, and is only limited by the CCD intrinsic noise. FIERA proposes remotely controlled readout modes with optional binning, windowing and flexible integration time. (2) two remotely exchangeable micro-lens arrays focusing the analyzed wave front directly on the CCD sensitive surface. The wave front sensor includes also its own atmospheric dispersion compensator. Due to the continuous rotation of the NAOS adapter, the mechanical stiffness of the visible wave front sensor must be very high not to disturb the loop operation (no more than 0.1 micrometer of lenslet array displacement compared to the CCD location over a 30 degree rotation angle of the instrument). The following simulations and tests are described: (1) simulation results providing an estimation of the NAOS maximum operating magnitude, (2) camera optimization, (3) mechanical stiffness measurements.

Citation Download Citation

Philippe Feautrier, Pierre Y. Kern, Reinhold J. Dorn, Gerard Rousset, Patrick Rabou, Sylvain Laurent, Jean-Luis Lizon, Eric Stadler, Yves Magnard, Olivier Rondeaux, Matthieu Cochard, Didier Rabaud, Alain Delboulbe, Pascal Puget, and Norbert N. Hubin "NAOS visible wavefront sensor", Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); https://doi.org/10.1117/12.390321

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