CPC G02B 27/283 (2013.01) [G02B 27/0172 (2013.01); G02B 27/425 (2013.01); G02F 1/136277 (2013.01); G02B 2027/0178 (2013.01)] | 20 Claims |
1. An optical assembly comprising:
a light source for illuminating a display; and
a diffraction type polarizing beam splitter (DT-PBS) configured to direct light from a light director, wherein the DT-PBS is polarization sensitive and configured to direct, based on polarization, a first portion of light towards the display,
wherein at least one of the DT-PBS and the light director comprise one of a reflective polarization volume grating, a transmissive polarization volume grating, a Pancharatnam-Berry Phase (PBP) grating, a liquid crystal filled surface relief grating, or a holographic polymer dispersed liquid crystal grating.
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