US 11,754,841 B2
Eyepieces for augmented reality display system
Samarth Bhargava, Saratoga, CA (US); Victor Kai Liu, Mountain View, CA (US); and Kevin Messer, Mountain View, CA (US)
Assigned to Magic Leap, Inc., Plantation, FL (US)
Filed by Magic Leap, Inc., Plantation, FL (US)
Filed on Jan. 14, 2022, as Appl. No. 17/576,488.
Application 17/576,488 is a continuation of application No. 16/689,645, filed on Nov. 20, 2019, granted, now 11,237,393.
Claims priority of provisional application 62/769,933, filed on Nov. 20, 2018.
Prior Publication US 2022/0137417 A1, May 5, 2022
Int. Cl. G02B 27/01 (2006.01); G06T 19/00 (2011.01); G02B 27/28 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 27/283 (2013.01); G06T 19/006 (2013.01); G02B 2027/0118 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An eyepiece waveguide for an augmented reality display system, the eyepiece waveguide comprising:
an optically transmissive substrate having a first surface and a second surface;
an input coupling grating (ICG) region formed on or in one of the surfaces of the substrate, the ICG region being configured to receive an input beam of light and to couple the input beam into the substrate as a guided beam;
a first combined pupil expander-extractor (CPE) grating region formed on or in the first surface of the substrate, the first CPE grating region being positioned to receive the guided beam from the ICG region and to create a first plurality of diffracted beams at a plurality of distributed locations, and to out-couple a first plurality of output beams,
wherein the first CPE grating region is a first two-dimensional (2D) CPE grating region; and
a second CPE grating region formed on or in the second surface of the substrate, the second CPE grating region being positioned to receive the guided beam from the ICG region and to create a second plurality of diffracted beams at a plurality of distributed locations, and to out-couple a second plurality of output beams,
wherein the second CPE grating is a second 2D CPE grating region.