| 摘要 |
A light-scattering film is provided and includes a transparent support having thereon at least a light-scattering layer. When substantially parallel light is incident on a surface of the film at an incident angle of 5°, the reflectance for an angle theta in the light-receiving part measured in a plane containing the film normal line and the incident direction is R(theta), the value obtained by normalizing R(theta) by the reflectance of regular reflection is Rrel(theta), and the value calculated from the maximum variation |dRrel(theta)/dtheta|max for the angle theta is a scattering coefficient A (formula 1), the reflection coefficient B (formula 2) calculated from the scattering coefficient A and the 5° specular reflectance Rs is from 2.0 to 5.0. <?in-line-formulae description="In-line Formulae" end="lead"?>Scattering coefficient A=1/(10x|dRrel(theta)/dtheta|max) (Formula 1)<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>Reflection coefficient B=2.2xlog 10(Rs)-7.5xlog 10(A)+5.9 (Formula 2)<?in-line-formulae description="In-line Formulae" end="tail"?>
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