Patent application number | Description | Published |
20080232221 | Optically variable magnetic stripe assembly - An optically variable magnetic stripe assembly includes a magnetic layer, an optically variable effect generating layer over the magnetic layer, and an electrically non-conductive reflective layer between the magnetic layer and the optically variable effect generating layer. | 09-25-2008 |
20090004571 | Optically Variable Security Device - A method of forming a security device comprises:
| 01-01-2009 |
20110011937 | OPTICALLY VARIABLE MAGNETIC STRIPE ASSEMBLY - An optically variable magnetic stripe assembly comprises a magnetic layer ( | 01-20-2011 |
20110239886 | SECURITY DEVICE COMPRISING A PRINTED METAL LAYER IN FORM OF A PATTERN AND METHODS FOR ITS MANUFACTURE - A security device including a transparent base layer having a surface provided with an optically variable relief microstructure; a transparent high refractive index layer on the surface of the base layer, the high refractive index layer conforming to the surface relief microstructure; and a reflective metal layer printed on the transparent high refractive index layer. The metal layer is printed in the form of a pattern. The thickness of the transparent high refractive index layer is selected so as to achieve constructive interference of light with a wavelength λ in the range 450-650 nm reflected at each surface of the high refractive index layer. | 10-06-2011 |
20120268598 | SECURITY DEVICE - A lenticular device includes an array of lenticular focusing elements located over a corresponding array of pairs of image strips such that, in a first viewing direction, a first image strip from each pair is viewed by respective ones of the lenticular focusing elements and, in a second viewing direction, different from the first, a second image strip from eachpair is viewed by respective ones of the lenticular focusing elements, One of each pair of image strips has portions defining a first image in a first colour and a second image in a second colour respectively, and the other of each pair of image strips has portions defining the first image in the second colour and the second image in the first colour respectively, whereby on tilting the device, a colour switch is observed between the first and second images. | 10-25-2012 |
20120268819 | SECURITY DEVICE AND METHOD OF MANUFACTURING THE SAME - A security device includes at least two lenticular devices, each lenticular device having an array of elongate lenticular focusing elements located above respective sets of image strips, wherein the elongate directions in which the lenticular focussing elements of the two lenticular devices extend are different. | 10-25-2012 |
20120274998 | SECURITY DEVICE - A security device having a lenticular device that includes an array of lenticular focusing elements located over a corresponding array of sets of image strips such that at different viewing directions, a corresponding image strip from each set is viewed via respective ones of the lenticular focusing elements wherein the image strips are defined at least in part by a relief structure. | 11-01-2012 |
20130038942 | MOIRE MAGNIFICATION DEVICE - A moiré magnification device includes a transparent substrate carrying: a regular array of micro-focusing elements, that define a focal plane, on a first surface; a corresponding first array of microimage elements in a first colour located in a plane substantially coincident with the focal plane; and a corresponding second array of microimage elements, in a second colour, located in a plane substantially coincident with the focal plane. The pitches of the micro-focusing elements and first and second arrays and their relative locations are such that the array of micro-focusing elements cooperates with each of the first and second arrays to generate magnified versions of the microimage elements due to the moiré effect. The magnified version of the first array is viewed against a background defined by the magnified version of the second array, the first array exhibiting movement relative to the background when the device is tilted. | 02-14-2013 |
20130043670 | SECURITY DEVICE - A security device includes a transparent, coloured element in a first region of the device and in a surface of which a first optically variable effect generating relief structure is formed. A reflection enhancing layer extends over the first optically variable effect generating relief microstructure and follows the contour of the relief, the reflection enhancing layer also being provided in a second region of the device laterally offset from the first region. | 02-21-2013 |
20130044362 | OPTICAL DEVICE - An optical device comprises a transparent substrate having: an array of micromirrors on one surface of the substrate; and a corresponding array of microimage elements, the micromirrors presenting convex surfaces to the microimage elements whereby each convex surface causes ambient light to pass through the microimage element array from a virtual focus, the arrangement of the microimage elements and micromirrors being such that they cooperate to generate a lenticular type or a moiré magnification effect. | 02-21-2013 |
20130056971 | MOIRE MAGNIFICATION DEVICE - A moiré magnification device including a transparent substrate carrying: an array of micro-focusing elements, the focusing elements defining a focal plane; a first array of microimage elements in a first colour and a second array of microimage elements in a second colour, the first and second arrays of microimage elements are located in a plane substantially coincident with the focal plane of the focusing elements, the second array of microimage elements being laterally offset from the first. The pitches of the micro-focusing elements, first and second arrays of microimage elements and their relative locations are such that the array of micro-focusing elements cooperates with each of the first and second arrays of microimage elements to generate respective magnified versions of the microimage elements due to the moiré effect. An interruption zone is perceived between the magnified versions of the first and second microimage arrays, respectively, and exhibits no magnified versions. | 03-07-2013 |
20130106092 | SECURITY DEVICE | 05-02-2013 |