Multi-region light scattering element

Details Multi-region light scattering element Multi-region light scattering element

2005-08-04

2008-08-05

Lee, Diane I. (Department: 2851)

Optical: systems and elements

Projection screen

Embedded particles

C359S455000, C359S457000, C359S460000, C349S095000, C349S096000, C349S086000, C348S771000, C348SE13035, C348S086000, C362S612000

Reexamination Certificate

active

07408707

ABSTRACT:
A multi-region light scattering element with the optical characteristics of low speckle, high resolution high contrast, and high gain when used as an imaging element without any resulting loss of transmission or brightness with viewing angle. The multi-region light scattering element contains at least one region asymmetrically shaped light scattering features that are separated from a second light scattering region by a non-scattering region. In one embodiment, one or more of the regions contains particles that are asymmetrically shaped that improve the optical performance. In one embodiment, asymmetric particles are located in two regions separated by a non-scattering region with the particles within each region substantially aligned along an axis and the two axes are substantially perpendicular to each other. Methods for production of the screen element are also described.

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Patent Abstracts of Japan for JP 2001 228547 A (Matsushita Electric Ind. Co. Ltd.), vol. 2000, No. 25 (2001).
International Search Report for PCT/US2005/027589, mailed Dec. 2, 2005.

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