Quote:
Originally Posted by Merlin66
Why is it so difficult to find an IR blocking filter (say>700nm) with NO UV restriction (ie <380nm)??? 
They all seem to be variations on the UV-IR blockers.
I'm looking for a IR blocker which still allows access to CaK/H at 393nm |
Have you tried Edmund Optics? They're not cheap but they have a good range of band pass filters.
https://www.edmundoptics.com/c/optical-filters/610/