Quoted: If this is true is there some other sort of thermal imager that I can put behind another type of sight? |
Forget putting a thermal scope behind a traditional scope. That's not going to work. Regular scopes are meant to transmit visible light (0.4-0.7 microns). Thermal scopes works in 3-5 or 8-12 microns), You can see that the lens on thermal scopes are black.....that's because it doesn't let visible light through. One of the reasons why you can't see through glass with FLIR.
There are materials out there that will transmit visible and thermal range, but it's very expensive and have too much transmission loss in visible. If the scope optics is made from that material, I guarantee that you will think it's a POS scope.
FLIR is not restricted....you can buy one with a new BMW or hand held stuff. They're around.