Optical Thin Film Coating – PFG Optics
PFG Optics thin-film optics is the branch of optics that deals with very thin structured layers of different materials.In order to exhibit optical thin film coating, the thickness of the layers of material must be on the order of the wavelengths of visible light. Layers at this scale can have remarkable reflective properties due to light wave interference and the difference in refractive index between the layers, the air, and the substrate. These effects alter the way the optic reflects and transmits light. This effect, known as thin-film interference, is observable in soap bubbles and oil slicks.
In manufacturing, thin film layers can be achieved through the deposition of one or more thin layers of material onto a substrate (mostly glass). This is most often done using a physical vapor deposition process, such as evaporation or sputter deposition, or a chemical process such as chemical vapor deposition.
Thin films are used to create optical thin film coating.