HOW MUCH YOU NEED TO EXPECT YOU'LL PAY FOR A GOOD UNCOOLED LONG-WAVE INFRARED LENS

The freeform area loses its rotational symmetry assets that needs extra ray sampling in the process of optimization, which supplies rise to some slower ray tracing construction and larger concurrency price than spherical and aspheric surfaces.This method is made up of 4 lenses. Only one diffractive lens on L1 and a person conical surface on L2 are