Open Access
Fig. 4
Download original image
Final achieved contrast curves as a function of calibration photon flux. The dark hole is a half-dark hole with an inner working angle of 1.5 λ/D. The dark hole with the lowest photon flux reaches a contrast of 10−7, while the dark hole with the highest photon flux reaches 3 × 10−11.
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.