Patent · US Active

Laser projection device having a diffuser arranged in an image focal plane and an object focal plane and method for manufacturing a laser projection device

US8212198B2 · kind B2 · utility

6Cited by

7References

28Claims

0Family size

Assignee

SONY GROUP CORPORATION · JP

Inventors

Zoltan Facius · Stuttgart, DE
Marco Hering · Stuttgart, DE
Markus Kamm · Karlsruhe, DE
Manfred Manz · Esslingen am Neckar, DE

Key dates

Filing date	Dec 3, 2009
Grant date	Jul 3, 2012
Priority date	—
Expiry date	Jan 18, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04N9/3129
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Laser projection device comprising an image generating unit, intermediate imaging optics configured to generate an intermediate image at an image focal plane (210), an image diffusing element (300) and a projection lens (400) with an object focal plane (410), wherein the image diffusing element (300) is arranged in the image focal plane (210) and in the object focal plane (410) and comprises a superimposed microstructure (310) formed of constituent parts (311), which are regularly distributed within a surface plane (320) of the image diffusing element (300).

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