A focal plane sensor for low-order sensing on laser tomographic systems: LIFT

Serge Meimon; Thierry Fusco; Frederic Cassaing

doi:10.1117/12.857291

28 July 2010 A focal plane sensor for low-order sensing on laser tomographic systems: LIFT

Serge Meimon, Thierry Fusco, Frederic Cassaing

Proceedings Volume 7736, Adaptive Optics Systems II; 773611 (2010) https://doi.org/10.1117/12.857291
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

Laser Tomographic systems, such as ATLAS, will rely on natural guide stars (NGS) to sense low order perturbation. This low order perturbation contains low order turbulence and Telescope Windshake, which strength lead to NGS wave front sensor (WFS) frame rate of several hundred Hertz. Therefore, the ability of the NGS WFS to deliver precise low order measurements in low signal to noise conditions will drive the limit magnitude of the NGS, hence the sky coverage. We have investigated the use of a focal plane sensor for this purpose, and consider it as the most efficient sensor in this context. We propose LIFT (LInearized Focal-plane Technique), and compare it to classical sensors, such as Quad Cell WFS, Pyramid WFS and Shack-Hartmann WFS. We derive an analytic model of the noise propagation law, which we validate on End-to-End diffractive simulations, based on realistic phase screens.

Citation Download Citation

Serge Meimon, Thierry Fusco, and Frederic Cassaing "A focal plane sensor for low-order sensing on laser tomographic systems: LIFT", Proc. SPIE 7736, Adaptive Optics Systems II, 773611 (28 July 2010); https://doi.org/10.1117/12.857291

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