Patent ID: 7990493

Claim:
A laminated optical film comprising: a first optical anisotropic layer, and a second optical anisotropic layer, wherein Relationship (1) is satisfied when a slow phase axis of the first optical anisotropic layer is substantially perpendicular to a slow phase axis of the second optical anisotropic layer, −10 nm≦ΔRe1−ΔRe2≦10 nm Relationship (1) wherein Relationship (2) is satisfied when the slow phase axis of the first optical anisotropic layer is substantially parallel to the slow phase axis of the second optical anisotropic layer, and −10 nm≦ΔRe1+ΔRe2≦10 nm Relationship (2) wherein an in-plane retardation value Re of the laminated optical film as a whole satisfies 30 nm≦Re≦500 nm, where ΔRe 1 denotes a value obtained by calculating the expression Re 1 (at a relative humidity of 80%)−Re 1 (at a relative humidity of 50%) concerning the first optical anisotropic layer, and ΔRe 2 denotes a value obtained by calculating the expression Re 2 (at a relative humidity of 80%)−Re 2 (at a relative humidity of 50%) concerning the second optical anisotropic layer.