US 12,339,452 B2
Holographic waveguide
Jackie Lynn Mills, Waterloo (CA); Shreyas Potnis, Waterloo (CA); Timothy Paul Bodiya, Toronto (CA); and Stefan Alexander, Elmira (CA)
Assigned to GOOGLE LLC, Mountain View, CA (US)
Appl. No. 17/635,858
Filed by GOOGLE LLC, Mountain View, CA (US)
PCT Filed Aug. 17, 2020, PCT No. PCT/CA2020/051127
§ 371(c)(1), (2) Date Feb. 16, 2022,
PCT Pub. No. WO2021/030908, PCT Pub. Date Feb. 25, 2021.
Claims priority of provisional application 62/888,129, filed on Aug. 16, 2019.
Prior Publication US 2022/0299772 A1, Sep. 22, 2022
Int. Cl. G02B 27/01 (2006.01); G02B 1/04 (2006.01); G02B 27/00 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 1/045 (2013.01); G02B 27/0081 (2013.01); G02B 2027/0125 (2013.01); G02B 2027/0174 (2013.01); G02B 2027/0178 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A waveguide comprising:
a first photopolymer layer;
a second photopolymer layer;
a first barrier layer disposed between the first photopolymer layer and the second photopolymer layer;
a first transparent layer; and
a second transparent layer, wherein the first photopolymer layer, the first barrier layer, and the second photopolymer layer are disposed between the first transparent layer and the second transparent layer.