Patent ID: 7548372

Claim:
A light reflector which comprises a laminate film having a light-diffusive layer (B) on one surface of a substrate layer (A), wherein the surface roughness index Z, as represented by the following formula (1), of the light-reflective surface of the light reflector is at least 1, the reflectance R 1 thereof at a wavelength of 550 nm is at least 95%, and the regular reflectance R 2 thereof, as represented by the following formula (2), at a wavelength of 550 nm is at most 3%: Surface roughness index Z= (surface area, Sf , of light-reflective surface)/(volume, V , of the projections of light-reflective surface) (1) Regular Reflectance R 2 =(reflectance R 1)−(diffuse reflectance R 3) (2) wherein R 3 is a diffuse reflectance at a wavelength of 550 nm.