reflective film supplier

What is a reflective film?

The advantages of the metal reflective film are simple preparation process and wide wavelength range; The disadvantage is that the light loss is large, and the reflectivity cannot be very high. To further improve the reflectivity of the metal reflective film, several layers of dielectric layers with a certain thickness can be plated on the outside of the film to form a metal-dielectric reflective film. It should be pointed out that the metal-dielectric film increases the reflectivity of a certain wavelength (or a certain wave region), but destroys the neutral reflection characteristics of the metal film.

All-dielectric reflection film is based on multi-beam interference. In contrast to the antireflective film, the reflectivity of the optical surface can be increased by plating a film with a refractive index higher than the base material on the optical surface. The simplest multilayer reflection is formed by alternating evaporation of two materials with high and low refractive indexes. The optical thickness of each layer is one-fourth of a certain wavelength. Under this condition, the reflected light vector on each interface participating in the superposition has the same vibration direction. The synthetic amplitude increases with the increase of the number of film layers.

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