Patent · US Active

Ultra-compact HUD utilizing waveguide pupil expander with surface relief gratings in high refractive index materials

US9715067B1 · kind B1 · utility

95Cited by

399References

20Claims

0Family size

Assignee

Rockwell Collins, Inc. · US

Inventors

Robert D. Brown · Lake Oswego, US
Kurt A. Stahl · Portland, US
Robert B. Wood · Detroit, US
Lincoln J. Burns · Tigard, US

Key dates

Filing date	Sep 30, 2011
Grant date	Jul 25, 2017
Priority date	—
Expiry date	Jun 3, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG02B2027/0174
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A head up display include an image source, and a waveguide. The waveguide has a first diffraction grating and a first end and a second diffraction grating at a second end. The waveguide is positioned as a combiner and allows viewing of an outside scene and information from the image source. The first and second diffraction gratings are surface relief gratings having a high index of modulation.

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