Inexpensive episcopic MTF target?

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blekenbleu
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Re: Inexpensive episcopic MTF target?

Post by blekenbleu »

Trying the opposite, namely matte black sprayed blade against nearly white nearly opaque polymer sheet:
IJblackCrop1.png
... then the lighter half of line profile suggests about 4 pixel radius:
PlotBlackCrop1.png
Metaphot, Optiphot 1, 66; AO 10, 120, and EPIStar 2571
https://blekenbleu.github.io/microscope
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