Patent ID: 7236221

Claim:
A multilayer optical compensation film comprising at least one optically anisotropic first layer and at least one optically anisotropic second layer contiguous to the first layer, wherein said first layer satisfies the relation: nx 1 ≧ny 1 ≧nz 1 wherein said second layer comprises amorphous polymer with a glass transition temperature above 160° C., and satisfies the relations: | nx 2 −ny 2 |<0.001 nz 2 −( nx 2 +ny 2 )/2 >0.005 wherein nx 1 , ny 1 and nz 1 are indices of refractions of the first layer in x, y and z directions of the first layer, respectively, and wherein nx 2 , ny 2 and nz 2 are indices of refractions of the second layer in x, y and z directions of the second layer, respectively.