> fizikiškai mąstant turi būti giliai pochuj, nes atspindintis sluoksnis turi į abi puses atspindėt infraredą.

http://hyperphysics.phy-astr.gsu.edu/HBASE/phyopt/antiref.html :

"If the coating is a quarter wavelength thickness and the coating has an
index of refraction less that the glass it is coating then the two reflections
are 180 degrees out of phase."

http://hyperphysics.phy-astr.gsu.edu/HBASE/phyopt/interf.html#c3 :

"Reflected light will experience a 180 degree phase change when it reflects
from a medium of higher index of refraction and no phase change when it reflects
from a medium of smaller index."

   Priešinga kryptimi gaunasi mažesnis lūžio rodiklis ir efekto nėra.

-- 
  saimhe