POLARIZATION CONVERSION SYSTEMS WITH POLARIZATION GRATINGS AND RELATED FABRICATION METHODS

摘要

The polarization conversion system includes a lens element, a polarization grating including a diffractive element having a spatially-varying local optical axis, and a retarder element. Wherein the polarization grating is arranged to receive light output from the lens element and the retarder element is arranged to receive polarized light of different polarization states output from the polarization grating and to convert the different polarized states into the same polarization state Respectively. Related devices and manufacturing methods are also disclosed.