Patent ID: 9513481
Filing Date: 2016-12-06
CPC Classification: G02B,G02F,H04N

Claim Text:
1. An optical system, comprising: an optical device for collimating polarized light-waves comprising an arrangement of optical elements, the optical device having at least one light-waves entrance surface and at least one light-waves exit surface; a light-transmitting substrate having at least two major surfaces parallel to each other, edges and a light-waves input aperture; the light-waves input aperture of the light-transmitting substrate being located adjacent to the exit surface of the collimating optical device; an optical element for coupling the collimated light waves into the substrate by internal reflection; at least one partially reflecting surface located in the substrate for coupling the light waves out of the substrate, the partially reflecting surface being non-parallel to the major surfaces of the substrate; at least one display light source for producing the polarized light-waves, the display light source located adjacent to the entrance surface of the optical device; and a half-wavelength retardation plate positioned between the display light source and the entrance surface of the optical device for rotating the polarization of the polarized light-waves in the optical system.