Hi.
I found hot spots in the Detector of the fly's eye beam homogenizer.
I don't understand why it occurred and where did it come from.
Is it a real physical situation?
Thanks.
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Your optical path is not constructed properly. Here’s the setup for a homogenizer based on a single lens array.
A simple rearrangement of your optical path looks like this:
Note the plano-convex lens has been flipped to reduce aberration. The hot spots are now gone.
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