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US 2014/0191500 A1Published application
Security device
AssigneeDe La Rue International Limited
InventorBrian W. Holmes
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AssigneeDe La Rue International Limited
InventorBrian W. Holmes
Estimating the term…
A security device has a lenticular device including an array of lenticular focusing elements; a corresponding array of image strips sets, the sets having substantially the same periodicity as, or an integral multiple of the periodicity of, the array of focusing elements. The strips are formed and the focusing elements located relative to the strips such that at each of a plurality of viewing angles, a respective one strip from each set is viewed in response to incident light falling on a respective focusing element. The strips are constructed such that the device presents a cyclically repeating sequence of images as the device is viewed at successive viewing angles, the image sequence including a change in form of an image between a first and second form and then a reversal of the sequence back to the first form, the combined image sequences presenting a contiguous variation in the image form.
A security device having a lenticular device comprising an array of lenticular focusing elements;
A method of manufacturing a security device, the method comprising providing a lenticular device comprising an array of lenticular focusing elements and a corresponding array of sets of image strips, the sets of image strips having substantially the same periodicity as, or an integral multiple of the periodicity of, the array of lenticular focusing elements, wherein the image strips are formed and the focusing elements located relative to the image strips such that at each of a plurality of viewing angles, a respective one image strip from each set is viewed in response to incident light falling on a respective lenticular focusing element, the image strips being constructed such that the device presents a cyclically repeating sequence of images as the device is viewed at successive viewing angles, the image sequence comprising a change in form of an image between a first form and a second form and then a reversal of the sequence back to the first form, the combined image sequences presenting a contiguous variation in the image form.
(canceled)
Dependencies are inferred from the claim text.