The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 2012
Filed:
May. 07, 2008
Roger Phillips, Santa Rosa, CA (US);
Matthew Witzman, Santa Rosa, CA (US);
Vladimir P. Raksha, Santa Rosa, CA (US);
Eric William Kurman, Healdsburg, CA (US);
Neil Teitelbaum, Ottawa, CA;
Roger Phillips, Santa Rosa, CA (US);
Matthew Witzman, Santa Rosa, CA (US);
Vladimir P. Raksha, Santa Rosa, CA (US);
Eric William Kurman, Healdsburg, CA (US);
Neil Teitelbaum, Ottawa, CA;
JDS Uniphase Corporation, Milpitas, CA (US);
Abstract
An optically variable device is disclosed having a substrate with an array of pyramidal structures formed upon it or within it. The structures are coated with an optically variable color-shifting coating. Each of the structures form a pyramidal-like having at least three slanted faces and wherein one or more colors seen when viewing the pyramids vary as substrate is rotated at least 30 degrees about an axis orthogonal to the substrate. In order to see a color shift the device is rotated around the surface normal of the substrate, while keeping the angle of incidence to the light source the same, and keeping the viewing angle the same. Various forms of pyramids may be used, however pyramids with planar faces are most suitable.