Polarization splitting sheet, optical sheet laminate, planar light source apparatus, and transmission-type display apparatus

摘要

In a polarization splitting sheet (10) made of a transparent base material sheet (12), a coating layer (14) is provided on the rear surface of the base material sheet(12), this coating layer (14) having spherical beads (16) of a diameter in the range from 1 to 10 mum protruding from its surface, the spherical beads (16) of the coating layer (14) making contact with a smooth surface (18A) of a light-transmitting material (18). The half-value width of the diameter of the spherical beads (16) is made no greater than 1 mum, and the protrusion height of the spherical beads (16) from the coating layer (14) is made uniform.