Optimization of center of gravity algorithms in a Shack-Hartmann sensor

T. Fusco; S. Thomas; M. Nicolle; A. Tokovinin; V. Michau; G. Rousset

doi:10.1117/12.670811

28 June 2006 Optimization of center of gravity algorithms in a Shack-Hartmann sensor

T. Fusco, S. Thomas, M. Nicolle, A. Tokovinin, V. Michau, G. Rousset

Proceedings Volume 6272, Advances in Adaptive Optics II; 627219 (2006) https://doi.org/10.1117/12.670811
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

We propose analytical studies supported by simulation of various centroiding algorithms for Shack-Hartmann based wavefront sensor. We focused on the simple center of gravity as well as one of its optimization, the weighted center of gravity. Noise effects, as well as linearity issues and high flux bias induced by sub-aperture size and PSF structures are investigated. For each method, optimal parameters are defined in function of photon flux, readout noise, and turbulence level.

Citation Download Citation

T. Fusco, S. Thomas, M. Nicolle, A. Tokovinin, V. Michau, and G. Rousset "Optimization of center of gravity algorithms in a Shack-Hartmann sensor", Proc. SPIE 6272, Advances in Adaptive Optics II, 627219 (28 June 2006); https://doi.org/10.1117/12.670811

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