How to understand the diffusion principle of the diffuser

Before understanding the diffusion principle of the diffuser, it is necessary to know the two principles first. Then the principle of the diffuser is through chemical or physical means. One is the principle of reflection and the other is the principle of refraction. The principle of reflection is that when light strikes a smooth interface from one medium to another, a portion of the light is reflected by the interface and another portion of the light is refracted through the interface in the other medium. The angle of incidence of the light is equal to the angle of reflection, and the reflected light is on either side of the normal to the plane in the same plane. The principle of refraction of the Led diffuser is that the refracted ray is located in the plane of the incident light and the normal, the refracted light and the incident light are on both sides of the normal, and the ratio of the incident angle to the sine of the angle of refraction is a constant.

Then the principle of the diffusion plate is to use physical or physical means to use the physical phenomenon of refraction, reflection and scattering when the light encounters two media with different refractive indices on the way, by adding in the base of PMMA PCPSPP and other substrates. The inorganic or organic light diffusing agent, or an array of micro-features through the appearance of the substrate, artificially adjusts the light, causes the light to refract, reflect, and scatter in different directions, thereby changing the traveling path of the light, thereby achieving sufficient color scattering of the incident light. This effect of optical diffusion, light diffuser is widely used in liquid crystal display, LED lighting and imaging display systems.