Hi
I'm looking to simulate a doublet of lens. I have a problem with photons when I
take the two lens separately. Photons are stopped in the interface.
For now, I'm trying to construct my doublet in one object but I don't know if
it's the best way.

For exemple, this is my lens

#declare lentille = merge
{
 intersection
 {
  cylinder{<0,0,16>,<0,0,1>,25.4}
  sphere{<0,0,15-83.2>,83.2}
  sphere{<0,0,71.1+3>,71.1}
  hollow
  pigment {Clear } interior { ior n1}
  photons {target reflection off refraction on collect off}
 }
 intersection
 {
  sphere{<0,0,247.7>, 247.7}
  cylinder{<0,0,7.7>,<0,0,-1>,25.4}
  hollow
  pigment {Clear } interior { ior n11}
  photons {target reflection off refraction on collect off}
 }
}

In this way, are my ior conserved in each part?
Does there another solution?

Thank you

Sylvain

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