Optical film everywhere!
It refers to an optical film on an optical substrate or a separate element, or a combination of coated-plated on one or more layers of dielectric film or metal film or a film of these two types of light in order to change the transmission characteristic of the transmission of light comprising, reflection, absorption, scattering, polarization and phase changes. Therefore, proper planning can be adjusted by varying different transmittance and reflectance of the outer member of the band, but also enables different plane of polarization of light having different characteristics.
Generally speaking, the primary method of producing an optical film is divided into dry and wet production process. The so-called dry type that is not liquid is present in the whole process, such as vacuum evaporation in a vacuum environment, heating the solid raw materials to power, after the progress of a gas attached to a solid substrate appearance, the end of the Tu cloth processing. Normal day seen decorated with gold, silver or a metallic packaging film, which is based on a dry coating method of manufacturing goods. But in practice Reflections mass production, the use of dry coating is less than the size of a wet coating.
The optical film classification
The optical film according to their use classification, characteristics and application can be divided into: a reflection film, antireflection film / antireflection coatings, filters, polarizers / polarizing film, compensation film / retardation plate, alignment film lax film / sheet, brightness enhancement film / prism sheet / condensing sheet, a light-shielding film / non-plastic. Related derivative varieties optical grade protective film, window film.
1, the reflective film
Reflection film is usually divided into two categories, one is the metal reflection film, one is all-dielectric reflection film. In addition, metal dielectric reflection film will link the two, the function is to add the appearance of the optical reflectivity.
2, antireflection film / antireflection film
Antireflection film, also known as AR coating, its primary function is to reduce or eliminate the reflected light lenses, prisms, mirrors and other school appearance, and then add the amount of light transmission of these elements, reduction or elimination of stray light system.
Plastic or glass filters are then made to participate in special dye, red filter only allows red light through, so analogy. The refractive index of glass and air have been almost all colored light can pass, it is transparent, but stained with the dye, the molecular structure changes, changes in the refractive index episode for some shade, there's been a change. For example, beam of white light through a blue filter, a blue glow is emitted, and green, red rare, most of them were absorbed filter.
4, polarizers film
Polaroid (PolarizingFilm) the full name should be polarizing film. LCD show the imaging necessary to rely on polarized light. The primary effect of polarizing film that is so not having polar partial onset natural light becomes polarized, may be converted into polarized light, coupled with changes in the characteristics of the liquid crystal molecules to reach the manipulation of light through or not, then the light transmittance progress and perspectives size, composition glare and other functions.