An optical coating is one or more layers of dielectric film, metal film or a combination of both on an optical element or a substrate. It can construct an interference effect in the optical system to change the characteristics of light transmission. Including the penetration, reflection, absorption, scattering, polarization and phase change of light waves…etc. The performance of an optical coating depends on the number of layers, the thickness of each layer, and the difference in refractive index at the interface of the film.
Many commonly types of coating are used in precision optics, such as anti-reflection film can reduce surface reflections. It can improve readability under sunlight or strong light, and reduce unwanted reflections. High-reflection film is designed to be used in a single or across a range of spectral bands to maximize reflectivity. It is most commonly used to create mirrors. Spectroscopic film is used to split incident light into known transmitted light, and reflected light output. Optical filters can be used in life sciences and medical applications, and for light penetration, reflection, absorption or attenuation at specific wavelengths.
Depending on the desired coating effect or the needs of different products, Sunda Optical Material offers a wide range of metal and compound materials for you to choose. Besides the coating material details, please feel free to contact us for further requirements.
【Related Downloads- Details of Optical Materials】