Fig. 5
Best (upper panel, corresponding to the red square in Fig. 4) and poorest (lower panel, corresponding to the black square in Fig. 4) noise filter point spread functions (solid lines) compared with the diffraction-limited PSF of GREGOR at 589 nm (dashed) and a hypothetical reconstruction-limited noise filter PSF for which all signal within the diffraction limit is recovered (dotted lines).
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