Patent ID: RE40655

Claim:
A polarization light splitting film having a light receiving side and a light transmitting side, the polarization light splitting film comprising: an optical rotation selection layer at the light receiving side for reflecting one of right and left circularly polarized components of a light beam that is incident on the light receiving side and for transmitting the other one of the right and left circularly polarized components of the light beam; a quarter-wave layer laminated over the optical rotation selection layer at the light transmitting side and for emitting linearly polarized light; a linear polarizing layer laminated over the quarter-wave layer at the light transmitting side and having a polarizing axis which substantially matches a polarization axis of the linearly polarized light emitted from the quarter-wave layer; and a diffusion layer disposed under the optical rotation selection layer at the light receiving side, the diffusion layer including a diffusion agent having an average particle diameter of 1 to 50 μm.