WTF is anti-reflective?
https://www.eurooptic.com/optics/anti-reflective-devices.aspx
These can also be 3d printed… The files are already out there I believe…
Is it for a gun scope or something?
I mean strictly speaking… cloaking devices. https://media.tenor.com/xRUjaJjLgEYAAAAC/klingon-birdofprey.gif