Fig. 18
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Top: optics Studio design of the RISTRETTO high contrast bench and spectrograph. Bottom: PSFs at the IFU level at λ = 633 nm. The two on the left are obtained with a VLT pupil, with a flat mirror in place of the DM for preliminary alignment, and with DM optimized in a best flat position. The two on the right show the same, after aligning the PIAAN, also with flat mirror and with best flat DM.
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