US 11,754,840 B2
Eye-imaging apparatus using diffractive optical elements
Chunyu Gao, Plantation, FL (US); Chulwoo Oh, Cedar Park, TX (US); Michael Anthony Klug, Austin, TX (US); and Evyatar Bluzer, Yuvalim (IL)
Assigned to Magic Leap, Inc., Plantation, FL (US)
Filed by Magic Leap, Inc., Plantation, FL (US)
Filed on Jul. 26, 2021, as Appl. No. 17/385,554.
Application 17/385,554 is a continuation of application No. 15/925,505, filed on Mar. 19, 2018, granted, now 11,073,695.
Claims priority of provisional application 62/474,419, filed on Mar. 21, 2017.
Prior Publication US 2022/0082833 A1, Mar. 17, 2022
Int. Cl. G02B 27/01 (2006.01); H04N 13/383 (2018.01); H04N 13/332 (2018.01); H04N 13/344 (2018.01); G02B 27/00 (2006.01); F21V 8/00 (2006.01); G06T 19/00 (2011.01)
CPC G02B 27/0172 (2013.01) [G02B 27/0093 (2013.01); G02B 27/0179 (2013.01); G06T 19/006 (2013.01); H04N 13/332 (2018.05); H04N 13/344 (2018.05); H04N 13/383 (2018.05); G02B 6/0076 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/0127 (2013.01); G02B 2027/0134 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/0178 (2013.01); G02B 2027/0185 (2013.01); G02B 2027/0187 (2013.01); H04N 2213/001 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A optical device comprising: an eyepiece comprising:
a substrate having a first surface proximate to a user and a second surface opposite the first surface;
a first coupling optical element disposed on the first surface and configured to collect light from an eye of the user; and
a second coupling optical element disposed on the first surface or the second surface and laterally offset from the first coupling optical element along a first direction parallel to one of the first surface or the second surface on which the second coupling optical element is disposed,
wherein the first coupling optical element is configured to deflect light at a first angle θ to totally internally reflect (TIR) the light between the first and second surfaces and toward the second coupling optical element, the second coupling optical element configured to deflect light at a second angle out of the substrate,
wherein the first coupling optical element has a first width along the first direction smaller than a stride distance of the light, and
wherein the eyepiece is configured to capture an image of the eye of the user using the light totally internally reflected within the substrate and deflected by the second coupling optical element.