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:
Aug. 31, 2010
Filed:
Sep. 25, 2006
Alexander Stuck, Wettingen, CH;
Harald Walter, Kilchberg, CH;
Marc Schnieper, Onex-Genève, CH;
Abstract
The diffractive optical device () can be used as a security device in the fields of authentication, identification and security. It comprises a zero-order diffractive color filter (). The diffractive color filter may consist of a microstructured high-index layer () embedded between two low-index layers (). A mirror layer () for reflecting towards the diffractive color filter () at least part of light transmitted through the diffractive color filter () are provided beneath the diffractive color filter. Thanks to the mirror layer (), the device () has a much higher reflected intensity and much more complex spectra than prior-art diffractive color filters.