US 11,733,523 B2
Diffractive optical elements with optical power
Asif Sinay, Tel-Aviv (IL); Nizan Meitav, Kiryat Ata (IL); Chulwoo Oh, Cedar Park, TX (US); Barak Freedman, Binyamina (IL); Michael Anthony Klug, Austin, TX (US); and Adam Charles Carlson, Miami, FL (US)
Assigned to Magic Leap, Inc., Plantation, FL (US)
Appl. No. 17/278,629
Filed by Magic Leap, Inc., Plantation, FL (US)
PCT Filed Sep. 25, 2019, PCT No. PCT/US2019/053014
§ 371(c)(1), (2) Date Mar. 22, 2021,
PCT Pub. No. WO2020/069026, PCT Pub. Date Apr. 2, 2020.
Claims priority of provisional application 62/737,042, filed on Sep. 26, 2018.
Prior Publication US 2022/0035161 A1, Feb. 3, 2022
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)] 21 Claims
OG exemplary drawing
 
1. A head mounted display system configured to project light to an eye of a user to display augmented reality image content in a vision field of said user, said head-mounted display system comprising:
a frame configured to be supported on a head of the user;
an image projector configured to project images into the user's eye to display image content in the vision field of the user;
at least one camera;
at least one waveguide having a user side facing the user;
at least one coupling optical element configured to couple light from the eye of the user into said waveguide, said at least one coupling optical element comprising a diffractive optical element (i) having optical power, (ii) configured to couple light from the eye of the user directly into guided light in said waveguide, and (iii) disposed on the user side of the waveguide; and
at least one out-coupling element configured to couple the guided light in said waveguide out of said waveguide and direct said light to said camera, wherein said guided light propagates from the optical coupling element to the out-coupling element entirely by total internal reflection within said waveguide,
wherein the camera is disposed in an optical path with respect to said at least one out-coupling optical element to receive at least a portion of the light that is coupled into said waveguide via the coupling optical element and guided therein and that is coupled out from said waveguide by said out-coupling coupling element such that images may be captured by said camera.