Our FoF Shield is the solution that maintains the best image quality while offering protection to your thermal device in a force on force training situation. Germanium is transparent to the LWIR wavelengths that thermal imaging devices detect which is why it is used to produce most thermal lenses, however it is very expensive and very difficult to cut. This sacrificial lens uses a custom cut Germanium window with specialized AR coatings to boost transmission for no noticeable loss in image quality. Other designs that use wire mesh cause image degradation, as can devices making use of incorrect coatings on the Germanium. Key Features: 5mm thick Germanium disc Dual transmission boosting wavelength specific anti reflective coatings for maximum transmission No noticeable image degradation Soft O-ring to dampen impact forces V2 FoF Shield includes a post to assist with turning the focus ring Please note that Germanium is brittle, and may not stand up to multiple hits. This is a sacrificial lens only, however it has been impact tested for both Force on Force simunition and airsoft. Our eCOTI protector shot with Speer Force on Force 5.56 ammunition from a 10.4" HK416 at point blank: With the marking material cleaned off, the Germanium disc is mostly intact but with a chip in the top corner. Origin:Designed in CanadaGermanium Window Manufactured in ChinaCover Assembly Manufactured in Canada
