RETROREFLECTIVE ARTICLE - NIPPON CARBIDE KOGYO KK

Title:

RETROREFLECTIVE ARTICLE

Document Type and Number:

WIPO Patent Application WO/2010/067583

Kind Code:

A1

Abstract:

Provided is a retroreflective article having excellent retroreflective efficiency, incident angle characteristics, observation angle characteristics, and rotation angle characteristics. The retroreflective article comprises many cube corner retroreflective elements arranged in a closest packed state on a common plane (plane Sc) in each of which three reflective side surfaces (surfaces a, b, c) share three edges (HD, HE, HF) and a vertex (H) and each of which has an optical axis passing through the vertex (H) and away from the three reflective side surfaces (surfaces a, b, c) by the same distance. The retroreflective article is characterized by including at least two or more cube corner retroreflective elements having optical axes tilted with respect to each other in a plane (plane Sv) containing an edge (HF) perpendicular to the reflective side surface (surface c) and common to the other reflective side surfaces (surfaces a, b) and a perpendicular line dropped to the common plane (plane Sc) from the vertex (H).

Inventors:

MIMURA IKUO (JP)
AMEMIYA KEIJI (JP)
HAYASHI CHIHIRO (JP)

Application Number:

PCT/JP2009/006693

Publication Date:

June 17, 2010

Filing Date:

December 08, 2009

Export Citation:

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Assignee:

NIPPON CARBIDE KOGYO KK (JP)
MIMURA IKUO (JP)
AMEMIYA KEIJI (JP)
HAYASHI CHIHIRO (JP)

International Classes:

G02B5/122; E01F9/619

Foreign References:

JPH10123309A	1998-05-15
JPH06501111A	1994-01-27
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JPS63109233A	1988-05-13
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JPS63109233U	1988-07-14

Other References: