Patent ID: 7760275
Filing Date: 2010-07-20
Classification: G02B,G02F

Abstract:
1. A phase difference compensation element, comprising at least one birefringent laminate, which contains a light transmissive base material and “a” number, where a≧2, of inorganic oblique incidence vacuum deposited films varying in direction of oblique evaporation, the inorganic oblique incidence vacuum deposited films having been laminated on a surface of the light transmissive base material, the birefringent laminate satisfying the conditions represented by Formula (i) and Formula (ii): wherein Re(i) represents the retardation value d·Δn of the inorganic oblique incidence vacuum deposited film which has been formed at an i-th stage of film formation among the stages of forming the “a” number of the inorganic oblique incidence vacuum deposited films, respectively, where 1≦i≦a, d represents the film thickness, and Δn represents the birefringent index.