If the material of the cover layer 2 of the refractive index n fills the grooves of the relief structure 4, {HEAD ~ the geometrical profile height hG} multiplied by the refractive index n becomes optically effective as {TAIL ~ the profile height h} 
If the material of the cover layer 2 of the refractive index n fills the grooves of the relief structure 4 , { HEAD ~ the geometrical profile height hG } multiplied by the refractive index n becomes optically effective as { TAIL ~ the profile height h }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL