Patent · US Active

Display device with diffraction grating having reduced polarization sensitivity

US11614573B2 · kind B2 · utility

1Cited by

3References

20Claims

0Family size

Assignee

Magic Leap, Inc. · US

Inventors

Vikramjit Singh · Pflugerville, US
Kang Luo · Austin, US
Xiaopei Deng · Cedar Park, US
Shuqiang Yang · Austin, US
Frank Y. Xu · Round Rock, US
Kevin Messer · Mountain View, US

Key dates

Filing date	Sep 11, 2020
Grant date	Mar 28, 2023
Priority date	—
Expiry date	Jul 15, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG02B2027/0185
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Diffraction gratings provide optical elements in head-mounted display systems to, e.g., incouple light into or out-couple light out of a waveguide. These diffraction gratings may be configured to have reduced polarization sensitivity. Such gratings may, for example, incouple or outcouple light of different polarizations with similar level of efficiency. The diffraction gratings and waveguides may include a transmissive layer and a metal layer. The diffraction grating may comprises a blazed grating.

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