| 摘要 |
An optical film having a laminate of three birefringent films A, B and C, the birefringent film A exhibiting dispersion and exhibiting Nz of from 0.4 to 0.6, the birefringent film B exhibiting larger dispersion than that of the birefringent film A and exhibiting smaller Re that that of the birefringent film A and Nz of from 0.4 to 0.6, the birefringent film C exhibiting Re of from 200 to 350 nm and exhibiting Nz of from 0.6 (not inclusively) to 0.9, the birefringent films A and B having slow axes crossing each other perpendicularly when Re=(nx-ny)d and Nz=(nx-nz)/(nx-ny) in which nx, ny and nz are refractive indices of each birefringent film in three-dimensional directions X, Y and Z, and d is the thickness of the birefringent film. A polarizer having a laminate of an optical film defined above and an absorptive type polarizing film, the absorptive type polarizing film being laminated on the birefringent film C side of the optical film so that an absorption axis of the absorptive type polarizing film is parallel to a slow axis of the birefringent film C. A liquid-crystal display device or another display device having an optical film or polarizer defined above.
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