| 摘要 |
Optical film comprises a optically isotropic resin film containing dispersed birefringent domains of thermoplastic resin, with a glass transition temperature (Tg) >= 50[deg]C and a nematic liquid crystal phase below the Tg of the resin film. The difference, delta n 1>, in refractive index between the film and domains in the direction perpendicular to the axis of maximum transmission for linear polarized light is >= 0.03 and that, delta n 2>, in the axial direction is = 50% of delta n 1>. Independent claims are also included for (a) optical devices with 2 or more layers of this film, superimposed so that the delta n 1> direction of all adjacent films are parallel; (b) laminated optical elements with polarizing film(s) and/or retardation film(s) in addition to layer(s) of the optical film. |
