LIGHT DIFFUSER AND USE THEREOF

摘要

A light diffuser and its use are provided, which not only reduces a color change in a source light when the light diffuser is disposed on an optical path of a light source, but also has a good light transmission property and a good light diffusion property. The light diffuser contains a thermoplastic resin and transparent particles added thereto. The total light transmittance of the light diffuser is 75% or more. The degree of dispersion of the light diffuser is 2° or more, the degree of dispersion being defined as a transmission angle at which a light transmittance is 50% of a rectilinear light transmittance when light is emitted to a surface of the light diffuser in a direction normal to the surface. The difference between the rectilinear light transmittance at 460 nm and the rectilinear light transmittance at 580 nm of the light diffuser is 0.96% or less.

主权项

1. A light diffuser which comprises a thermoplastic resin and transparent particles added thereto,
a total light transmittance of the light diffuser being 75% or more, a degree of dispersion of the light diffuser being 2° or more, wherein the degree of dispersion is defined as a transmission angle at which a light transmittance is 50% of a rectilinear light transmittance when light is emitted to a surface of the light diffuser in a direction normal to the surface, and a difference between a rectilinear light transmittance at a wavelength of 460 nm and a rectilinear light transmittance at a wavelength of 580 nm of the light diffuser being 0.96% or less.