Patent ID: 8760762
Filing Date: 2014-06-24
Classification: G02B

Abstract:
1. An optical apparatus comprising: a waveguide including first and second reflective surfaces being substantially parallel and opposing each other; an in-coupling region for receiving light into the waveguide through the first reflective surface, the waveguide to guide the light along an optical propagation path disposed at least partially between the first and second reflective surfaces, the light received at a first angle of incidence with respect to the second reflective surface; a reflective end surface positioned at an end of the waveguide and offset from perpendicular to the first and second reflective surfaces to reflect the light from the second reflective surface back to the second reflective surface along a reverse propagation path away from the reflective end surface at a second angle of incidence with respect to the second reflective surface that is less than the first angle of incidence; and an out-coupling region disposed on the first reflective surface to output the light along the reverse propagation path at the second angle of incidence from the waveguide out the first reflective surface.