| 摘要 |
A first adhesion layer and a second adhesion layer are formed on a base material formed of polyester biaxially stretched in this order from the side of the base material. Additionally, a hard coat layer and an antireflection layer are formed on the second adhesion layer to form a multilayer film. When refractive indices of the base material, the first adhesion layer, the second adhesion layer, and the hard coat layer are eta1, eta2, eta3, and eta4, respectively, the refractive indices are adjusted so as to satisfy the following formulae (1) to (3) to prevent rainbow unevenness. <?in-line-formulae description="In-line Formulae" end="lead"?>(eta1/eta4)<SUP>1/2</SUP>x0.95<=eta2/eta3<=(eta1/eta4)<SUP>1/2</SUP>x1.05 (1)<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>eta1<eta4 (2)<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>eta2<eta3 (3)<?in-line-formulae description="In-line Formulae" end="tail"?> The two adhesion layers can enhance the adhesive strength with the base material.
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