公开(公告)号：US12256153B1

公开(公告)日：2025-03-18

申请号：US17969605

申请日：2022-10-19

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Yun-Han Lee ,  Matthieu Charles Raoul Leibovici ,  Chulwoo Oh ,  Hyunmin Song ,  Junren Wang

IPC: H04N23/74 ,  G03H1/02 ,  G06F3/01 ,  H04N23/56

Abstract: Various embodiments set forth eye tracking systems. In some embodiments, an eye tracking system includes a polarization volume hologram (PVH) combiner having a rolling k-vector design that provides relatively wide coverage of users whose eyeglasses prescriptions can vary. The PVH combiner can further include (1) fiducial regions created by differential patterning that generate dark regions in images captured of an eye, and/or (2) multiple regions that diffract light at angles to produce different perspectives in the captured images. The dark regions and/or different perspectives can be used to calibrate eye tracking. In addition, the PVH combiner can include off-axis lens regions that generate glints for the eye tracking.

公开(公告)号：US11869560B2

公开(公告)日：2024-01-09

申请号：US17541223

申请日：2021-12-02

Applicant: Meta Platforms Technologies, LLC

Inventor： Hyunmin Song ,  Sanaz Alali ,  Yun-Han Lee ,  Zhisheng Yun

IPC: G11B7/1353 ,  G11B7/131 ,  G02B27/28

CPC classification number: G11B7/1353 ,  G02B27/283 ,  G11B7/131

Abstract: A system includes a polarization selective optical element configured to diffract a light reflected by an object into a plurality of signal lights. The system also includes at least one optical sensor configured to receive the signal lights and generate a plurality of tracking signals for tracking the object.

公开(公告)号：US20240231119A1

公开(公告)日：2024-07-11

申请号：US18522130

申请日：2023-11-28

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han Lee ,  Chulwoo Oh ,  Hyunmin Song ,  Xinyu Zhu ,  Zhang Jia ,  Yongmin Park ,  Jiawei Lu

IPC: G02B27/42 ,  G02B7/09 ,  G02B27/00

CPC classification number: G02B27/4216 ,  G02B7/09 ,  G02B27/0037

Abstract: The disclosed system may include a display; a lens; and a diffractive optical element, where the diffractive optical element is configured to increase a fill factor of the display when the lens is used to magnify the display. Various other apparatuses, systems, and methods are also disclosed.

公开(公告)号：US11624864B2

公开(公告)日：2023-04-11

申请号：US17209205

申请日：2021-03-22

Applicant: Meta Platforms Technologies, LLC

Inventor： Junren Wang ,  Lu Lu ,  Hyunmin Song ,  Yun-Han Lee

IPC: G02F1/1337 ,  G02F1/1335 ,  G02B5/30 ,  G02B5/02

Abstract: An optical element is provided. The optical element includes an optical film including a birefringent material having a chirality. Optically anisotropic molecules of the birefringent material disposed adjacent a first surface of the optical film are configured with a first pretilt angle in a range of greater than 10° and less than 80°, or in a range of greater than −80° and less than −10°. Optically anisotropic molecules of the birefringent material disposed adjacent a second surface of the optical film opposing the first surface are configured with a second pretilt angle in the range of greater than 10° and less than 80°, or in the range of greater than −80° and less than −10°.