How to determine diffraction limited MTF at a given contrast?

by rackandboneman   Last Updated October 16, 2019 22:18 PM - source

Tables and formulas to determine the "extinction"/"zero contrast" MTF in lp/mm at a given aperture, for a diffraction limited system, are well known.

How to determine the theoretical maximum MTF, at a given aperture, that will yield a given, non-zero contrast (eg 50%, 10%, 20%, 90%)?

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