US 11,838,496 B2
Method and system for tracking eye movement in conjunction with a light scanning projector
Brian T Schowengerdt, Seattle, WA (US); Mathew D. Watson, Bellevue, WA (US); Samuel Scott Frank, Shoreline, WA (US); and Charles David Melville, Camano Island, WA (US)
Assigned to Magic Leap, Inc., Plantation, FL (US)
Filed by Magic Leap, Inc., Plantation, FL (US)
Filed on May 3, 2021, as Appl. No. 17/306,732.
Application 17/306,732 is a continuation of application No. 16/892,184, filed on Jun. 3, 2020, granted, now 11,025,897.
Application 16/892,184 is a continuation of application No. 15/927,855, filed on Mar. 21, 2018, granted, now 10,715,794, issued on Jul. 14, 2020.
Claims priority of provisional application 62/474,497, filed on Mar. 21, 2017.
Prior Publication US 2021/0344897 A1, Nov. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 13/383 (2018.01); G02B 27/01 (2006.01); H04N 9/31 (2006.01); H04N 13/344 (2018.01); G02B 27/00 (2006.01); G02C 11/00 (2006.01)
CPC H04N 13/383 (2018.05) [G02B 27/0081 (2013.01); G02B 27/0093 (2013.01); G02B 27/0172 (2013.01); G02B 27/0179 (2013.01); H04N 9/3129 (2013.01); H04N 13/344 (2018.05); G02B 2027/0123 (2013.01); G02B 2027/0178 (2013.01); G02B 2027/0187 (2013.01); G02C 11/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An eye tracking system operable to track movement of an eye of a user, the eye tracking system comprising:
a light scanning projector;
an eyepiece optically coupled to the light scanning projector, wherein the eyepiece includes an inner surface facing the eye and an outer surface opposing the inner surface;
an optical sensor; and
an image processor coupled to the light scanning projector and the optical sensor, wherein the eyepiece comprises a diffractive reflector overlaying the eyepiece, wherein the diffractive reflector is formed as a planar layer laminated to the inner surface of the eyepiece and is operable to reflect, through diffraction, one or more time-varying reflected signals to the optical sensor.