Title:
WAVEGUIDE-BASED DISPLAYS INCORPORATING EVACUATED PERIODIC STRUCTURES
Document Type and Number:
WIPO Patent Application WO/2024/059644
Kind Code:
A3
Abstract:
Disclosed herein is a waveguide based display including: an optically transparent substrate; an input grating including an evacuated periodic structure (EPS) supported by the substrate, wherein the input grating diffracts light into total internal reflection (TIR) within the substrate; a fold grating comprising an EPS or a volume Bragg grating (VBG), wherein the fold grating receives the TIR light and expands the TIR light in a first direction; and an output grating including an EPS or a VBG. The output grating receives the expanded light and outputs the light and the input grating is spatially separated from the fold grating and the output grating.
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Inventors:
GRANT ALASTAIR (US)
Application Number:
PCT/US2023/074088
Publication Date:
April 25, 2024
Filing Date:
September 13, 2023
Export Citation:
Assignee:
DIGILENS INC (US)
International Classes:
G02B6/00; G02B5/18; G02B27/01
Attorney, Agent or Firm:
HSU, Kendrick (US)
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