| abstract |
A first layer containing a binder and fine particles having any one of tin oxide, indium oxide, zirconium oxide, and titanium oxide as a main component is formed at least on one surface of a base material formed of polyester in this order from a side of the base material. A second layer is disposed so as to be in contact with the first layer. Thereby, a multi-layer film is formed. When a refractive index of the base material is η1, that of the first layer is η2, and that of the second layer is η3, a formula denoted by η1<η2<η3 is satisfied. The multi-layer film has strong adhesive strength between layers, and exhibits excellent optical properties by efficiently preventing occurrence of rainbow unevenness due to interference of light on the interface. Further, the multi-layer film is used as a component of an image display device, thus ensuring excellent image quality. |