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Fig. 5.

image

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.

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