Zemax has developed Contrast Optimization, which targets the best MTF response at a desired spatial frequency, useful for extended images with cutoff frequencies set by the detectors. Optimizing directly on the MTF value is slow, difficult, and often fails. Contrast Optimization increases the MTF in a much more robust way and is just as fast as optimizing on the RMS wavefront.
Authored By Erin Elliot and others
Contrast Optimization – A Faster and Better Method for Optimizing System MTF - YouTube
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