US 12,487,457 B2
Virtual image delivery system for near eye displays
Tsion Eisenfeld, Ashkelon (IL); and Shimon Grabarnik, Rehovot (IL)
Assigned to LUMUS LTD., Ness Ziona (IL)
Appl. No. 17/792,974
Filed by LUMUS LTD., Ness Ziona (IL)
PCT Filed Jun. 1, 2021, PCT No. PCT/IL2021/050651
§ 371(c)(1), (2) Date Jul. 14, 2022,
PCT Pub. No. WO2021/245664, PCT Pub. Date Dec. 9, 2021.
Claims priority of provisional application 63/032,767, filed on Jun. 1, 2020.
Prior Publication US 2023/0051619 A1, Feb. 16, 2023
Int. Cl. G02B 27/01 (2006.01); G02B 6/26 (2006.01); G02B 27/09 (2006.01); G02B 27/14 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 6/26 (2013.01); G02B 27/0977 (2013.01); G02B 27/145 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An image delivery system (IDS) for a near eye display (NED), the IDS comprising:
a first waveguide comprising an input aperture for receiving an input virtual image provided by a display engine and a plurality of first facets positioned to reflect the input virtual image out of the first waveguide, the first facets having a reflectivity for s-polarized light that decreases substantially monotonically with an increase in an angle of incidence on the first facets between 40° and 76°; and
a second waveguide configured to receive the input virtual image from the first waveguide and comprising a plurality of second facets positioned to reflect the input virtual image out of the second waveguide as an output virtual image to an eye motion box (EMB),
wherein:
the facets comprise respective partially reflective coatings; and
the partially reflective coatings are configured to produce the output virtual image from the input virtual image with a fidelity of at least 80%.