×

Exit Pupil Expander for Laser-Scanner and Waveguide Based Augmented-Reality Displays

  • US 20170315347A1
  • Filed: 04/29/2016
  • Published: 11/02/2017
  • Est. Priority Date: 04/29/2016
  • Status: Abandoned Application
First Claim
Patent Images

1. An optical display apparatus for laser-scanner and waveguide based displays configured to increase the exit pupil of the optical display apparatus, the apparatus comprising:

  • a laser-based scanner having a first exit pupil size, wherein the laser-based scanner is focused onto an intermediate image plane;

    a diffuser positioned at the intermediate image plane, the diffuser comprising a plurality of pixels to receive input laser light from the laser-based scanner, wherein each pixel converts the input laser light received by that pixel into a secondary point source and steers output light emerging from the diffuser from each secondary point source towards a particular exit angle and having a particular conical angle; and

    a lens assembly for forming light generated by the laser-based scanner, the lens assembly having an input end for receiving output light emerging from the diffuser, an output end forming a second exit pupil having a second exit pupil size larger than the first exit pupil size, and one or more optical lenses positioned between the input end and the output end, andwherein the lens assembly is positioned relative to the diffuser and is configured such that the output light emerging from each secondary point source is distributed over substantially the entire second exit pupil, and produces at the output end of the lens assembly a collimated beam of the second exit pupil size.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×