• Patent Title: Methods of fabrication of optical aperture multipliers having rectangular waveguide
  • Application No.: US18011212
    Application Date: 2022-05-12
  • Publication No.: US11822053B2
    Publication Date: 2023-11-21
  • Inventor: Yochay DanzigerEdgar Friedmann
  • Applicant: Lumus Ltd.
  • Applicant Address: IL Ness Ziona
  • Assignee: LUMUS LTD.
  • Current Assignee: LUMUS LTD.
  • Current Assignee Address: IL Ness Ziona
  • Agent Mark M. Friedman
  • International Application: PCT/IL2022/050500 2022.05.12
  • International Announcement: WO2022/259234A 2022.12.15
  • Date entered country: 2022-12-19
  • Main IPC: G02B27/01
  • IPC: G02B27/01 G02F1/295 F21V8/00 G02B27/00
Methods of fabrication of optical aperture multipliers having rectangular waveguide
Abstract:
A method of fabricating an optical aperture multiplier is provided. A slice and a first optical structure are obtained. The slice has external faces including a pair of parallel faces, and a first plurality of partially reflective internal surfaces oblique to the pair of parallel faces. The first optical structure has external surfaces including a planar coupling surface, and a second plurality of partially reflective internal surfaces oblique to the coupling surface. The slice is optically coupled with the first optical structure such that one of the faces of the pair of parallel faces is in facing relation with the coupling surface to form a second optical structure. At least one optical aperture multiplier is sliced from the second optical structure by cutting the second optical structure through at least two cutting planes perpendicular to the coupling surface. The optical aperture multiplier is preferably part of a near eye display augmented reality system.
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