Focal plane coronagraphic images simulated with the FQPM coronagraph under the post-AO wavefront errors representing the residual level seen by SPHERE when atmospheric conditions are favorable. No additional static aberrations are added. (a) short exposure freezing the AO wavefront () at 783.25 nm. The radius of the AO-correction cut-off is 20 λ/D. The speckles smoothed out when (b) and (c) short-exposure images are averaged. With increasing , a gradual decrease of speckles can be observed in the images. The dark cross in all the images is due to the FQPM transitions. All images are at the same brightness scale.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.