Retardation compensator and single-panel type color liquid crystal projector

摘要

A form birefringence to compensate the phase retardation caused by a liquid crystal device has a retardation compensation film that is composed of alternately deposited high and low refractive index layers. The retardation compensation film is provided in at least one of the incident side and the emanation side of the liquid crystal device. The birefringence value Deltan and the total thickness d of the retardation compensation film are adjusted such that the retardation of the retardation compensation film agrees with the retardation of the liquid crystal device at least at one wavelength in the visible band.