Patent · US Active

Diffractive optical element with integrated in-coupling, exit pupil expansion, and out-coupling

US10429645B2 · kind B2 · utility

6Cited by
78References
19Claims
0Family size

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Inventor

Key dates

Filing dateOct 7, 2015
Grant dateOct 1, 2019
Priority date—
Expiry dateOct 18, 2035

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B2027/0152
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

In an optical near eye display system, a monolithic three-dimensional optical microstructure is formed by a waveguide substrate with at least one DOE having grating regions that integrate the functions of in-coupling of incident light into the waveguide, exit pupil expansion in one or two directions, and out-coupling of light from the waveguide within a single optical element. An in-coupling region of the DOE couples the incident light into the waveguide and to a beam steering and out-coupling region. The beam steering and out-coupling region provides exit pupil expansion and couples light out of the waveguide. The beam steering and out-coupling region of the DOE can be configured with a two-dimensional (2D) grating that is periodic in two directions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.