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Hot spots in fly's eye beam homogenizer

  • 1 December 2021
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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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Best answer by Jeff.Wilde 1 December 2021, 20:50

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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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