Optical films having reverse dispersion

摘要

This invention relates to an optical film comprising a first component having a birefringence dispersion of D 1 >1 and a second component having a birefringence dispersion of D 2 <1, wherein the birefringence ratio of the first and second component is delta n 1 /delta n 2 >0, wherein the optical film has a reverse birefringence dispersion of D<1.