| 摘要 |
<p>An optical film, has a film thickness of 15μm to 45μm, Rth (440 W, 30% RH) and“Rth (440 W, 30% RH)−Rth (440 W, 80% RH)”of the optical film satisfy Expression (1)−20 nm≰Rth (440 W, 30% RH)≰5 nm and Expression (2) 0 nm≰Rth (440 W, 30% RH)−RH (440 W, 80% RH)≰18 nm, here, in Expressions (1) and (2), Rth (440 W, 30% RH) represents a retardation value in a film thickness direction at a wavelength of 440 nm measured at 25° C. and at a relative humidity of 30% and Rth (440 W, 80% RH) represents a retardation value in the film thickness direction at a wavelength of 440 nm measured at 25° C. and at a relative humidity of 80%; a polarizer and liquid crystal display device.</p> |
