Method for producing a patterned retardation film, patterned retardation film and an image display device

Regard patterned retardation film to be applied to the three-dimensional image display by the passive method, provides a method of manufacturing a patterned retardation film can be produced easily and a large amount by the high accuracy. In the narrow slit than the area width of the exposure process, making the mask 16 subjected to the exposure process.