Title:
DISPERSION COMPENSATION FOR LIGHT COUPLING THROUGH A SLANTED SURFACE OF AN OPTICAL WAVEGUIDE
Document Type and Number:
WIPO Patent Application WO/2020/167602
Kind Code:
A3
Abstract:
An optical device (e.g., a pupil expander) includes a waveguide with a slanted facet. The optical device includes a reflector on the slanted facet and a prism, or a grating at the slanted facet. The prism or the grating compensates for the dispersion of an image light from a display, which reduces smearing of displayed images. The waveguide can be configured for pupil replication in one-dimension or two- dimensions.
Inventors:
CHI WANLI (US)
LEE HEE YOON (US)
LEE HEE YOON (US)
Application Number:
PCT/US2020/017206
Publication Date:
October 01, 2020
Filing Date:
February 07, 2020
Export Citation:
Assignee:
FACEBOOK TECH LLC (US)
International Classes:
G02B27/01
Foreign References:
| EP3413117A2 | 2018-12-12 | |||
| US20180067315A1 | 2018-03-08 | |||
| US20170045744A1 | 2017-02-16 |
Attorney, Agent or Firm:
MOON, William, A. et al. (US)
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