Diffusion material, diffusion material evaluating method, blending method for fine particles in the diffusion material, and production method for the diffusion material

摘要

A diffusion material includes a prescribed scattering S(λ) of respective fine particles that are determined by Mie theory for all plural kinds of fine particles at a wavelength λ of an incident light. The diffusion material includes plural kinds of fine particles having different refractive indices, dispersed into a matrix. Each particle providing light intensity attenuating rate C(λ) in the diffusion material, and chromaticity variations Δx and Δy of the incident light. The diffusion power of the diffusion material by using determined chromaticity variations Δx and Δy; the diffusion material that is evaluated by this evaluation method and can emit illumination light free from wavelength unevenness. The diffusion material includes a blending the fine particles to provide the prescribed diffusion and uniform illumination.