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Fig. 2

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Top: input PSFs used for the retrieval. Middle: output PSFs computed from the NZ phase retrieval. They are very similar to the input images in spite of the exposure time difference between the three defocused images. Bottom: differences between the input and retrieved PSFs. The low residuals (<10%) are due to a blurring effect related to the tip/tilt during exposure time. The intensities are represented to the power 1/4 to improve the contrast of the images.

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