公开(公告)号：US10983346B2

公开(公告)日：2021-04-20

申请号：US15698456

申请日：2017-09-07

Applicant: Microsoft Technology Licensing, LLC

Inventor： Tuomas Vallius ,  Adrian Travis ,  Tero Ollikainen ,  Dmitry Reshidko

IPC: G03H1/00 ,  G02B27/01 ,  F21V8/00 ,  G02B27/00 ,  H04N9/64 ,  G02B26/10

Abstract: Apparatuses and systems including curved optical waveguides, and methods for use include an output-grating of a curved waveguide that includes a spatially modulated grating period configured to cause, for each beam of light corresponding to an image coupled into a bulk-substrate of the curved waveguide by an input-grating, corresponding rays of light output from different locations of the output-grating to be substantially collimated. Adaptive optics of a display engine compensate for aberrations that vary over a field-of-view associated with light corresponding to the image out-coupled by the output-grating. Further, a curved portion of the curved waveguide is designed to keep internally reflected light below a critical angle to prevent inadvertent out-coupling thereof. Further, curved surfaces of the curved waveguide can include polynomial surfaces to compensate for lateral color errors and distortion.

公开(公告)号：US20190072767A1

公开(公告)日：2019-03-07

申请号：US15698456

申请日：2017-09-07

Applicant: Microsoft Technology Licensing, LLC

Inventor： Tuomas Vallius ,  Adrian Travis ,  Tero Ollikainen ,  Dmitry Reshidko

IPC: G02B27/01 ,  F21V8/00 ,  G02B26/10 ,  G02B27/00 ,  H04N9/64

Abstract: Apparatuses and systems including curved optical waveguides, and methods for use therewith, are described herein. An output-grating of a curved waveguide includes a spatially modulated grating period configured to cause, for each beam of light corresponding to an image coupled into a bulk-substrate of the curved waveguide by an input-grating, corresponding rays of light output from different locations of the output-grating to be substantially collimated. Adaptive optics of a display engine compensate for aberrations that vary over a field-of-view associated with light corresponding to the image out-coupled by the output-grating. Further, a curved portion of the curved waveguide is designed to keep internally reflected light below a critical angle to prevent inadvertent out-coupling thereof. Further, curved surfaces of the curved waveguide can include polynomial surfaces to compensate for lateral color errors and distortion.