Multichannel optically variable device
AssigneeSecurency International Pty Ltd
InventorKarlo Ivan Jolic
Life of this patent
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Abstract
A security element, a security device including a security element and a method of manufacturing a security device. The element having focusing elements and image elements, the image elements are located in an object plane such that each image element is associated with one of the focusing elements, wherein the object plane includes at least first and second distinct subregions, and an image element within the first subregion is phase-displaced by a phase-displacement distance with respect to an image element within the second subregion, and wherein the first and second subregions produce first and second optically variable images or part-images.
Claims21
-32. (canceled)
A security element, including a plurality of focusing elements and a plurality of image elements, the image elements being located in an object plane such that each image element is associated with one of the focusing elements,
- wherein the object plane includes at least first and second distinct subregions, and an image element within the first subregion is phase-displaced by a phase-displacement distance with respect to an image element within the second subregion,
- wherein the first subregion produces a first image at a first viewing angle and a second image at a second viewing angle, and wherein
- the second image is a contrast switched negative or positive version of the first image.
A method of forming a security device, including the steps of:
- providing a transparent or translucent substrate,
- applying a plurality of focusing elements to a first surface of the substrate, and
- applying a plurality of image elements to an image surface of the substrate, each image element being associated with one of the focusing elements,
- wherein the image surface includes at least first and second distinct subregions, and an image element within the first subregion is phase-displaced with respect to an image element within the second subregion,
- wherein the first subregion produces a first image at a first viewing angle and a second image at a second viewing angle, and wherein
- the second image is a contrast switched negative or positive version of the first image.
Dependencies are inferred from the claim text.