Light diffusing body and a transmission type screen

Abstract

A light diffusing body and transmission type screen, which can reduce the shift of the color tone of the light source light seen through the light diffusing body and prevent the phenomenon that the white light source seen through the light diffusing body looks colored, is provide. The light diffusing body 1 of the present invention comprises a transparent resin and spherical micro-particles having a different refractive index from that of the said transparent resin, wherein the relation between the maximum value (Emax) and the minimum value (Emax) of the effective scattering efficiency values (E) obtained for each center wavelength in the wavelength ranges of blue, green and red by dividing the sum of scattering cross-sections of all spherical micro-particles contained in the unit area of the aforementioned light diffusing body 1 by the sum of geometrical cross-sections of all these spherical micro-particles satisfies Emin/Emax≧0.90.

Dependencies are inferred from the claim text.