Enhanced security of optical article

US8361587B2 · kind B2 · utility

Assignee

• NBCUniversal Media, LLC · US

Inventors

• James Anthony Cella · Clifton Park, US
• David Gilles Gascoyne · Schenectady, US
• Ben Purushotam Patel · Niskayuna, US
• Paul Michael Smigelski, Jr. · Schenectady, US
• James Mitchell White · Niskayuna, US
• Gregory Allen O'Neil · Clifton Park, US
• Andrea Jeannine Peters · Clifton Park, US
• Matthew Jeremiah Misner · Delanson, US
• Trevor James Dale · Trevose, US
• Whitney Jeanne Olson · Scotia, US
• Marc Brian Wisnudel · Clifton Park, US

Key dates

• Filing date: Mar 13, 2009
• Grant date: Jan 29, 2013
• Expiry date: Oct 15, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B23/284
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An optical article comprising a primary mark disposed on the optical article and a secondary mark disposed on the optical article in close proximity to the primary mark. The primary mark comprises a first optical-state change material and the secondary mark comprises a second optical-state change material. The optical article is transformed from a pre-activated state to an activated state when a localized authorized activation method is used that selectively activates the primary mark. The optical article is transformed from a pre-activated state to an deactivated state when a non-localized unauthorized activation method is used that activates the secondary mark along with the primary mark resulting in the second optical-state change material undergoing a reverse color change when compared to the first optical-state change material. An optical article with a single mark including multiple color change optical-state change material is also disclosed. Methods of covering and encapsulating the marks are also disclosed.