High contrast optical path corrected screen

Details High contrast optical path corrected screen High contrast optical path corrected screen

2005-09-13

2008-11-18

Mahoney, Christopher (Department: 2862)

Optical: systems and elements

Projection screen

Embedded particles

C359S456000, C359S460000

Reexamination Certificate

active

07453636

ABSTRACT:
By using high and low refractive index materials, a planarized reflective-refractive Fresnel lens and a planarized refractive lenticular lens can be created. These flat screen components eliminate the need for an air-gap, thus reducing the screen thickness. Additionally, this allows for the screen to be manufactured on a roll-to-roll process that can significantly reduce the screen cost. By adding the capability of planarizing the elements, they can be combined in a final structure on a roll-to-roll process. Since the Fresnel lens can be combined with the lenticular lens before exposure of the black stripe region, the exposure of the black stripe region can account for any deviation from true collimation or non-normal angle of incidence of the light path in the projection system design.

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Nitto DenkoPress Release, Nov. 11, 2003, 2 pages, http://www.nitto.com/company/release/03—11—11/index.html.
Shikama et al.SID Digest, 46.2:1250-1253 (2002).

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