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Hot spots in fly's eye beam homogenizer

  • December 1, 2021
  • 1 reply
  • 718 views

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.

 

Best answer by Jeff.Wilde

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.

 

 

1 reply

Jeff.Wilde
Luminary
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  • Luminary
  • Answer
  • December 1, 2021

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.