US 12,306,409 B2
Diffractive optical elements with optical power
Asif Sinay, Tel-Aviv (IL); Nizan Meitav, Kiryat Ata (IL); Chulwoo Oh, Sammamish, WA (US); Barak Freedman, Binyamina (IL); Michael Anthony Klug, Austin, TX (US); and Adam C. Carlson, Plantation, FL (US)
Assigned to Magic Leap, Inc., Plantation, FL (US)
Filed by Magic Leap, Inc., Plantation, FL (US)
Filed on Jun. 29, 2023, as Appl. No. 18/344,416.
Application 18/344,416 is a continuation of application No. 17/278,629, granted, now 11,733,523, previously published as PCT/US2019/053014, filed on Sep. 25, 2019.
Claims priority of provisional application 62/737,042, filed on Sep. 26, 2018.
Prior Publication US 2023/0341695 A1, Oct. 26, 2023
Int. Cl. G09G 5/00 (2006.01); G02B 27/01 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 2027/0107 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/0178 (2013.01); G02B 2027/0187 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A head-mounted display system comprising:
an image projector;
a camera; and
an eyepiece configured, during operation of the system, to receive light from the image projector and direct the light along a first optical path to a user's eye, and to direct light reflected from the user's eye along a second optical path to the camera located on a world side of the eyepiece, the eyepiece comprising:
a waveguide having a first surface facing the user's eye;
a first in-coupling optical element on the first surface in the first optical path configured to in-couple light from the image projector into the waveguide;
a second in-coupling optical element on the first surface in the second optical path configured to in-couple light reflected from the user's eye into the waveguide such that the in-coupled light that reflected from the user's eye travels via total internal reflection within the waveguide;
an out-coupling optical element on the first surface in the second optical path configured to out-couple the light reflected from the user's eye and guided within the waveguide out of the waveguide and direct the out-coupled light to the camera;
a light source located on a user side of the eyepiece opposite the camera and arranged to illuminate the user's eye with infrared light, the user side being opposite the world side;
a first lens having optical power disposed on the user side of the eyepiece in the second optical path; and
a second lens having optical power disposed on the world side of the eyepiece.