公开(公告)号：US20240427153A1

公开(公告)日：2024-12-26

申请号：US18736419

申请日：2024-06-06

Applicant: Meta Platforms Technologies, LLC

Inventor： Joshua Cobb ,  Derek Wallin ,  Ajit Ninan ,  Chun Chi Wan

IPC: F21V9/14 ,  F21Y115/10 ,  G02B27/01 ,  H01L33/50 ,  H01L33/60 ,  H04N9/31

Abstract: A polarizing illuminator includes a light source, a collimator for collimating a light beam emitted by the light source, a parallel plate having a first surface and a second surface disposed at an acute angle with respect to the light beam, the first surface including a transmissive portion and a reflective portion, and the second surface including a reflective polarizer configured to reflect one polarization of the light beam, transmit an orthogonal polarization of the light beam, and split the light beam into first and second orthogonally polarized sub-beams, and a retarding wave plate disposed between the reflective portion of the first surface and the reflective polarizer, wherein the retarding wave plate is configured to rotate at least one of the first sub-beam and the second sub-beam to a matched polarization, and the first and second sub-beams having the matched polarization propagate parallel to each other.

公开(公告)号：US20250164695A1

公开(公告)日：2025-05-22

申请号：US18785679

申请日：2024-07-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Prathmesh Deshmukh ,  Tingling Rao ,  Zhaoyu Nie ,  Andrew John Ouderkirk ,  Jie Li ,  Yuanrui Li ,  Jianji Yang ,  Zhenye Li ,  Sawyer Miller ,  Xuan Wang ,  Joshua Cobb ,  Hsien-Hui Cheng ,  Eugene Cho ,  Robin Sharma ,  Eric Stratton ,  Ajit Ninan ,  Zhexin Zhao ,  Xiayu Feng ,  Yun-Han Lee ,  Michael Escuti ,  Steven John Robbins ,  Babak Amirsolaimani ,  Lu Lu ,  Barry David Silverstein

IPC: G02B6/27 ,  G02B6/34 ,  G02B27/01 ,  G06F1/16

Abstract: An optical element includes a waveguide body that is configured to guide light by total internal reflection from an input end to an output end, an input coupling element located at the input end for coupling light into the waveguide body, and an output coupling element located at the output end for coupling light out of the waveguide body, where the waveguide body includes an organic solid crystal. The organic solid crystal may be a single crystal having principal axes rotated with respect to the dimensions of the waveguide body. Such an optical element may have low weight and exhibit good color uniformity while providing polarization scrambling of the guided light.

公开(公告)号：US12056276B1

公开(公告)日：2024-08-06

申请号：US18140563

申请日：2023-04-27

Applicant: Meta Platforms Technologies, LLC

Inventor： Alexandre Chapiro ,  Ajit Ninan

IPC: G06F3/01 ,  G02B27/01

CPC classification number: G06F3/013 ,  G02B27/0172 ,  G02B2027/0178 ,  G02B2027/0187

Abstract: An eye tracking technique obtains a more precise estimate of a gaze location on an image by determining the vergence location of a user's eyes. The more precise estimate of the gaze location may be obtained by using multiple inputs, including a coarse estimate of the gaze location using a camera that receives non-visible light reflected from the eyes, discrete probabilities of gaze locations for each eye, depth information for objects contained in the image, and saliency information for objects contained in the image.