Patent · US Active

Optical unit, light processing unit, light processing method, illumination unit and image generation unit

US7901086B2 · kind B2 · utility

3Cited by

11References

54Claims

0Family size

Assignee

Sony Deutschland GmbH · DE

Inventors

Olivier Ripoll · Eßlingen, DE
Markus Kamm · Karlsruhe, DE

Key dates

Filing date	Mar 12, 2007
Grant date	Mar 8, 2011
Priority date	—
Expiry date	Oct 30, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG02B5/32
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

For displaying a color image by recombination of several single color images, parasitic noise like speckles due to scattering within the system, in particular when laser light is involved, with the invention a significant improvement with a low number of parts can be realized by use of a color wheel that comprises in radially divided zones refractive elements for redirecting light beams incoming at different impinging angles and redistributing elements, e.g. a hologram, that provide for a defined output beam in an optical axis. The sequence of the individual light processing zones on the color wheel are synchronized with respective laser sources. The invention combines the functionality of plural elements, reduces speckles and avoids losses.

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