Patent · US Active

Ghost image elimination of doe using fourier optics method

US11209586B2 · kind B2 · utility

0Cited by

5References

8Claims

0Family size

Assignees

Fusao Ishii · US
NTT DOCOMO, INC. · JP

Inventors

Fusao Ishii · Menlo Park, US
Mikiko Nakanishi · Tokyo, JP
Kazuhiko Takahashi · Yokohama, JP
Yuji Aburakawa · Yokohama, JP
Keiichi Murakami · Hachioji, JP

Key dates

Filing date	Dec 15, 2017
Grant date	Dec 28, 2021
Priority date	—
Expiry date	Dec 15, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG02B2027/0178
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A see-through image display system having a DOE often has undesirable light or so called ghost images due to the quantization of saw tooth shape of DOE surface. This invention provides ways to eliminate ghost images.

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