Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
Reexamination Certificate
2007-03-13
2007-03-13
Koval, Melissa Jan (Department: 2851)
Optical: systems and elements
Projection screen
Unitary sheet comprising plural refracting areas
C353S082000, C353S082000, C353S082000
Reexamination Certificate
active
11254785
ABSTRACT:
A transmission screen includes a Fresnel lens sheet through which light is projected from a projector to a lenticular lens sheet arranged on a viewer side, as approximately parallel light, and the lenticular lens sheet receiving light passing through the Fresnel lens sheet, and emitting the approximately parallel light while horizontally widening, by means of a group of cylindrical lenses which are horizontally in parallel, wherein in at least one of the Fresnel lens sheet and the lenticular lens sheet, on a surface of a light diffusing substrate, in which a light diffusing material is dispersed, irregularities which constitute a lens section is formed, and in the light diffusing substrate, dispersion density of the light diffusing material differs in at least two layers in the thickness direction.
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Merriam-Webster's Collegiate Dictionary, Tenth Edition, copyright 2001, p. 651, definition of “laminate”.
Abe Takashi
Matsumura Kikuko
Shiina Yoshiaki
Yoshida Tsutomu
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