Achromatic quarter wave film

摘要

The invention relates to an achromatic quarter wave film (AQWF) comprising at least one quarter wave film (44) (QWF) and at least one half wave film (42) (HWF), each of said QWF and HWF comprising polymerized or vitrified anisotropic material, to methods and materials for the preparation of the AQWF, its use in optical devices like compensators and liquid crystal displays, and to a liquid crystal display comprising such an AQWF. <IMAGE>