US 12,293,607 B2
Holographic eye imaging device
Daniel Tornéus, Danderyd (SE)
Assigned to Tobii AB, Danderyd (SE)
Filed by TOBII AB, Danderyd (SE)
Filed on Feb. 10, 2023, as Appl. No. 18/167,363.
Application 18/167,363 is a continuation in part of application No. 16/834,574, filed on Mar. 30, 2020, granted, now 11,594,075.
Claims priority of application No. 1950397-8 (SE), filed on Mar. 29, 2019.
Prior Publication US 2023/0186682 A1, Jun. 15, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06V 40/00 (2022.01); G02B 5/18 (2006.01); G02B 5/32 (2006.01); G02B 27/42 (2006.01); G03H 1/02 (2006.01); G06F 3/01 (2006.01); G06V 40/19 (2022.01)
CPC G06V 40/19 (2022.01) [G02B 5/1876 (2013.01); G02B 5/32 (2013.01); G02B 27/4205 (2013.01); G03H 1/0248 (2013.01); G06F 3/013 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An eye tracking device for tracking an eye, comprising:
a first lens;
a first diffractive optical element (DOE), arranged adjacent to the first lens and in front of the eye;
an image module, wherein the image module is configured to capture an image of the eye via the first DOE,
wherein the first DOE is adapted to direct a first portion of incident light reflected from the eye towards the image module,
wherein the first DOE is configured to provide a lens effect; and
wherein the first DOE and the second DOE are positioned side by side, as seen from the eye, or
wherein the first DOE and the second DOE are positioned at least partly overlapping, as seen from the eye.