Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
Reexamination Certificate
2003-07-15
2008-05-27
Lee, Diane I. (Department: 2851)
Optical: systems and elements
Projection screen
Unitary sheet comprising plural refracting areas
C359S456000, C359S460000
Reexamination Certificate
active
07379240
ABSTRACT:
A rear projection-type screen includes two sheet-like members having lenses prevented from being deformed and scratched. In the rear projection-type screen (5) for passing and focusing image light L emitted from an image light source (3), two sheet-like members (a lenticular lens sheet7and a Fresnel lens sheet8) each made of a transparent material and having minute lenses (9) and (11) formed on at least one surface thereof are disposed such that their surfaces (7b) and (8a) with the lenses formed thereon confront each other, and a plurality of spacers (14), (14), . . . are disposed at appropriate spaced intervals between the confronting lenses of the two sheet-like members within an effective screen area (5a) for passing and focusing the image light thereon.
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Iwaki Takaaki
Murakami Kyoichi
Cruz Magda
Frommer William S.
Frommer & Lawrence & Haug LLP
Lee Diane I.
Sony Corporation
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