Share Email Print

Proceedings Paper

Combining spatially filtered Shack-Hartmann wavefront sensing and coronography in closed loop AO simulations
Author(s): Visa Korkiakoski; Miska Le Louarn; Christophe Verinaud
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

We made complete end-to-end adaptive optics (AO) simulations to model the closed loop performance with and without pupil apodization, a spatially filtered wavefront sensor (SF-WFS) and a coronagraph. We investigated the SF performance (the Strehl ratio and the stellar intensity reduction in the halo) with several configurations in different seeing conditions. We also ran several extensive coronagraph simulations modeling a 32m telescope to obtain an investigate the exoplanet detection possibilities. The results show that a four-quadrant phase mask coronagraph can damp the intensity about 105 times from the original intensity at seeing conditions having r0=20 cm at 0.5μm. When the SF is used, an additional intensity reduction of about 50-70% can be obtained.

Paper Details

Date Published: 25 October 2004
PDF: 10 pages
Proc. SPIE 5490, Advancements in Adaptive Optics, (25 October 2004); doi: 10.1117/12.551084
Show Author Affiliations
Visa Korkiakoski, European Southern Observatory (Germany)
Miska Le Louarn, European Southern Observatory (Germany)
Christophe Verinaud, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 5490:
Advancements in Adaptive Optics
Domenico Bonaccini Calia; Brent L. Ellerbroek; Roberto Ragazzoni, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?