Hi, I am trying to use an anulus and a cylinder 2 pipe to form a lens aperture stop, I set both to ABSORB at the material taps. But there are still a lot of rays pass through. I close the anulus or open the anulus, the intensity on the detector is the same. Looks like they are still transparent. Could you tell me how to fix this. Thanks so much
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If I put the anulus before the paraxial lens, the anulus is transparent. If I put it after the paraxial lens, it is a absorber. Is it some default property of the paraxial lens?
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