US 11,747,535 B2
Skew illuminator
Mark R. Ayres, Boulder, CO (US); Adam Urness, Louisville, CO (US); Kenneth E. Anderson, Longmont, CO (US); and Chris Berliner, Westminster, CO (US)
Assigned to Akonia Holographics LLC, Longmont, CO (US)
Appl. No. 16/484,799
Filed by Akonia Holographics LLC, Longmont, CO (US)
PCT Filed Feb. 15, 2018, PCT No. PCT/US2018/018384
§ 371(c)(1), (2) Date Aug. 8, 2019,
PCT Pub. No. WO2018/152336, PCT Pub. Date Aug. 23, 2018.
Claims priority of provisional application 62/459,553, filed on Feb. 15, 2017.
Prior Publication US 2019/0361163 A1, Nov. 28, 2019
Int. Cl. G02B 5/32 (2006.01); G02B 27/10 (2006.01); G03H 1/04 (2006.01)
CPC G02B 5/32 (2013.01) [G02B 27/10 (2013.01); G03H 1/041 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system comprising:
a waveguide having first and second substrates, the first substrate having a first planar surface and a second planar surface parallel to the first planar surface, the second substrate having a third planar surface and a fourth planar surface parallel to the third planar surface, and the third planar surface being parallel to the second planar surface;
a spatial light modulator (SLM) having a lateral surface parallel to the fourth planar surface;
a holographic grating medium interposed between and in contact with the second and third planar surfaces, wherein the second substrate is interposed between the holographic grating medium and the SLM; and
a grating structure in the holographic grating medium and configured to diffract incident light toward the SLM about an axis forming an angle with a surface normal of an active area of the SLM.