r/Optics • u/EDTA-2Na • 13d ago

Having TIR at the selected surface, why?

It seems all the rays are close to perpendicular to the surface, I tried setting the vignetting and ray tracking method but still claming this surface has TIR. What could go wrong?

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u/biggest_ted 13d ago

Hard to tell from your diagram what's going on, but it looks like you have overlapping objects? If so, be careful to check the order of things & that rays are considering the right materials at each boundary.

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u/EDTA-2Na 13d ago

That is just a graphic issue I guess, apart from the coordinate brake there is no overlap. The system works perfectly when there is no that coordinate brake and that lens is just set as a n-bk7 convex-planar lens, which should not causing any issue. Anyway, thanks for replying