DIFFUSION MATERIAL, DIFFUSION MATERIAL EVALUATING METHOD, BLENDING METHOD FOR FINE PARTICLES IN THE DIFFUSION MATERIAL, AND PRODUCTION METHOD FOR THE DIFFUSION MATERIAL

摘要

The method of evaluating a diffusion material that determines the total cross-sectional area of scattering S_total (λ) inside the diffusion material as a total of cross-sectional areas of scattering S (λ) of respective fine particles that are determined by Mie theory for all of plural kinds of fine particles at a wavelength λ of a incident light to the diffusion material in which plural kinds of fine particles having different refractive indices are dispersed into a matrix, determines from this a light intensity attenuating rate C(λ) in the diffusion material, determines chromaticity variations Δx and Δy of the incident light to and emitted light from the diffusion material using this, and evaluates a 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 method of blending the fine particles into the diffusion material for obtaining such the diffusion material and the method of producing the diffusion material are provided.