Patent Number: 7,535,641

Title: Optically variable element comprising a partial transparent element

Abstract: An optically variable element, in particular an optically variable safeguard element for safeguarding banknotes, credit cards and the like. A security product and a foil, in particular an embossing foil or a laminating foil, having such an optically variable element. The optically variable element has a thin film for producing color shifts by means of an interference and/or a reflective layer. The optically variable element further has a transparent window. The interference film and/or the reflective layer include a partial element, namely a partial thin film element or a partial reflective element, respectively. The partial element or elements surround the surface region of the transparent window.

Inventors: Wild; Heinrich (Herzogenaurach, DE), Brehm; Ludwig (Adelsdorf, DE)

Assignee: Leonhard Kurz GmbH & Co., KG

International Classification: G02B 1/10 (20060101)

Expiration Date: 2021-05-19 0:00:00