| 摘要 |
Provided is an optical film that can reduce the occurrence of wrinkles and undulations when the optical film is adhered to glass, particularly to glass with a small curvature radius. The optical film comprises a dielectric multilayer film obtained by alternately laminating, on a resin base material, a high-refractive-index layer containing a first polymer and a low-refractive-index layer containing a second polymer. When maintained at 130°C for 30 minutes, the optical film fulfills all of the following formulas: (1) 2.0 < Ta < 4.5, (2) 1.6 < Tb < 3.5, and (3) 0.2 ≤ |Ta – Tb| ≤ 1.0, where Ta (unit: %) represents the heat shrinkage in an arbitrary direction, and Tb (unit: %) represents the heat shrinkage in a direction orthogonal to the arbitrary direction. |
