Title:
OPTICAL SYSTEMS WITH REFLECTIVE PRISM INPUT COUPLERS
Document Type and Number:
WIPO Patent Application WO/2021/055278
Kind Code:
A3
Abstract:
An electronic device may include a display module that generates light and an optical system that redirects the light towards an eye box. The system may include an input coupler on a waveguide and a lens that directs the light towards the input coupler. The input coupler may include a prism having a reflective surface that reflects the light into the waveguide. The reflective surface may be curved to provide the light with an optical power. The prism may be configured to expand a field of view of the light. A birefringent beam displacer may expand the effective pupil size of the light. The lens may include lens elements that converge the light at a location between the lens elements and the waveguide. A switchable panel may be placed at the location and toggled between first and second orientations to increase the effective resolution of the light.
Application Number:
PCT/US2020/050709
Publication Date:
April 15, 2021
Filing Date:
September 14, 2020
Export Citation:
Assignee:
AKALANA MAN LLC (US)
International Classes:
G02B27/01; F21V8/00; G02B6/34
Domestic Patent References:
| WO2015162611A1 | 2015-10-29 | |||
| WO2014155096A1 | 2014-10-02 |
Foreign References:
| CN108693641A | 2018-10-23 | |||
| US20140140653A1 | 2014-05-22 |
Attorney, Agent or Firm:
TREYZ, George, Victor (US)
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