The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2026
Filed:
Jul. 10, 2023
Apple Inc., Cupertino, CA (US);
Itai Afek, Kefar Sava, IL;
Ariel Lipson, Tel Aviv, IL;
Eran Tal, Petah Tikva, IL;
Mark R Ayres, Boulder, CO (US);
Ken Anderson, Longmont, CO (US);
Maria I Campana, Boulder, CO (US);
Daniel Ott, Boulder, CO (US);
Sagee Rosen, Netzer Sereni, IL;
Apple Inc., Cupertino, CA (US);
Abstract
A display may include an emitter that emits infrared light and a coupler that couples the light into a waveguide and couples reflected infrared light coaxial with the light out of the waveguide. The optical coupler may include a polarizing beam splitter (PBS) mounted to a lateral surface of the waveguide. A linear polarizer may transmit the light to the PBS, which reflects the light towards a prism or a set of diffractive gratings that couple the light into the waveguide and that couple the reflected light out of the waveguide and towards the PBS. The PBS may transmit the reflected light towards a sensor for gaze tracking. The light and reflected light may be coupled through opposing surfaces of the waveguide if desired. These structures may serve to prevent reflected stray light from reaching the sensor and interfering with gaze tracking.