公开(公告)号：US11619815B2

公开(公告)日：2023-04-04

申请号：US16733092

申请日：2020-01-02

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Gang Li ,  Changwon Jang ,  Giseung Bang ,  Andrew Maimone ,  Mengfei Wang ,  Afsoon Jamali ,  Lu Lu ,  Hao Yu

IPC: G02B27/01

Abstract: An optical assembly includes a beam steering device and a holographic optical element. The beam steering device is switchable between different states including a first state and a second state. The beam steering device includes a first polarization-selective optical element and a first tunable optical retarder optically coupled with the first polarization-selective optical element. The holographic optical element is positioned relative to the beam steering device for receiving light from the beam steering device and projecting a first light pattern while the beam steering device is in the first state and a second light pattern distinct from the first light pattern while the beam steering device is in the second state.