公开(公告)号：US11774737B2

公开(公告)日：2023-10-03

申请号：US16796385

申请日：2020-02-20

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Brian Wheelwright ,  Daniel Guenther Greif ,  Kieran Connor Kelly

IPC: G02B21/00 ,  G02F1/1335 ,  G02B7/182 ,  G01N21/88

CPC classification number: G02B21/0048 ,  G01N21/8806 ,  G02B7/1821 ,  G02F1/133536

Abstract: A beam scanner includes a substrate, a tiltable reflector hingedly supported by the substrate, and a reflective polarizer. The reflective polarizer is supported over the tiltable reflector and configured to receive and redirect a light beam towards the tiltable reflector for scanning the light beam. A projector includes the beam scanner and a light source providing a light beam. The light beam may be modulated in brightness, color, or polarization synchronously with tilting the reflector, thereby forming an image in angular domain after propagating through a pupil-replicating waveguide. At least one folding mirror may be provided for directing the light beam from the light source around the pupil-replicating waveguide, resulting in a compact overall configuration.