公开(公告)号：US10750145B1

公开(公告)日：2020-08-18

申请号：US15988472

申请日：2018-05-24

Applicant: Oculus VR, LLC

Inventor： Erik Shipton ,  Alireza Moheghi ,  Giuseppe Calafiore ,  Hee Yoon Lee

IPC: G02B27/01 ,  H04N9/43 ,  G02F1/1334 ,  H04N9/31 ,  G02F1/29

Abstract: An apparatus may include a projector that switches from emitting monochromatic light of a first color to emitting monochromatic light of a second color that is different from the first color. The apparatus may also include one or more variable-pitch diffraction gratings that diffract monochromatic light emitted from the projector. The apparatus may further include a controller that changes a pitch of at least one of the one or more variable-pitch diffraction gratings from a first pitch used when the projector is emitting monochromatic light of the first color to a second pitch used when the projector is emitting monochromatic light of the second color.

公开(公告)号：US20190339447A1

公开(公告)日：2019-11-07

申请号：US16057744

申请日：2018-08-07

Applicant: Oculus VR, LLC

Inventor： Erik Shipton ,  Bharath Bangalore Rajeeva

IPC: G02B6/122 ,  G02B27/09 ,  G02B27/01 ,  G02B27/10

Abstract: A diffraction grating with independently controlled diffraction angles for optical beams at different wavelengths may be used to redirect and couple light to a waveguide in an efficient, space-saving manner. The diffraction grating can include a layer with optical permittivity and associated index contrast of the grating grooves at different grating periods dependent on wavelength.