'Dielectric layers' are coatings constructed of multi-layers of insulator materials in which the interference properties of a design composed of materials of various refractive indices are used to reflect, transmit or absorb various wavelength bands.
“绝缘层”是由多层绝缘体材料构成的，这种材料由折射指数各异的结构组成，其干涉特性被用来反射、传播或吸收各种波长的波段。