Patent · US Active

Head mounted projection display with multilayer beam splitter and color correction

US10139644B2 · kind B2 · utility

1Cited by

10References

25Claims

0Family size

Assignee

Tilt Five, Inc

Inventors

Wei Rong · Midland, US
Evan L. Coons · San Mateo, US
Jeri J. Ellsworth · Kirkland, US
Ken Clements · Los Gatos, US

Key dates

Filing date	Jun 30, 2017
Grant date	Nov 27, 2018
Priority date	—
Expiry date	Jun 30, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG02B2027/0156
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A head mounted projection display includes a polarizing beam splitter stack that includes a waveplate. The polarizing beam splitter stack reduces optical losses and has a low forward extension. The polarizing beam splitter may be used at a 45 degree angle or at a non 45 degree angle relative to the line of view. A correction may be also be performed to the intensity of individual pixels to account for chromatic non-uniformity in the optical response of a retroreflector and other optical components.

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