Optical: systems and elements – Diffusing of incident light
Reexamination Certificate
2005-07-12
2005-07-12
Nguyen, Thong Q (Department: 2872)
Optical: systems and elements
Diffusing of incident light
C359S831000, C362S035000
Reexamination Certificate
active
06917473
ABSTRACT:
An optical film has a transparent film, an adhesive layer provided on one surface of the transparent film, the adhesive layer having a refractive index different by 0.1 or less from that of a layer of the one surface of the transparent film, and a repetitive prismatic structure provided on the other surface of the transparent film, the repetitive prismatic structure having optical path changing slopes aligned in a substantially constant direction at an inclination angle in a range of from 35 to 48 degrees with respect to a plane of the transparent film. Another optical film has a transparent film having an average in-plane retardation of not larger than 30 nm, an adhesive layer provided on one surface of the transparent film, the adhesive layer having a refractive index different by 0.12 or less from that of a layer of the one surface of the transparent film, and the repetitive prismatic structure provided on the other surface of the transparent film. Still another optical film has a transparent film having a refractive index of not lower than 1.49, a transparent adhesive layer provided on one surface of the transparent film, the transparent adhesive means having a refractive index of not lower than 1.49, and the repetitive prismatic structure provided on the other surface of the transparent film.
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Ariyoshi Toshihiko
Suzuki Takao
Umemoto Seiji
Nguyen Thong Q
Nitto Denko Corporation
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