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Old Nov 2nd 2018, 11:24 AM   #1
Junior Member
Join Date: Nov 2018
Posts: 1
Numerical aperture problem (optic fiber output after lens)

Hi all,

I'm facing an issue: I'm using a NA = 0.16 lens to focus light into an optic fiber with NA = 0.5 (I'm using that lens because I want it to be compatible even with a NA = 0.22 optic fiber I want to use in the future), but what is the aperture of the output of the optic fiber? I'd say it's still 0.16 because internal reflections shouldn't change it, but I'm not sure.

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