Abstract: A rotor lock assembly for locking a rotor of a wind turbine. The rotor lock assembly has at least one relocatable rotor lock. The relocatable rotor lock has a housing, a bushing element, a pin shaft position within the bushing element, and a locking mechanism. The housing includes a mounting portion adapted for mounting to a bearing housing adjacent to a rotor lock plate of the rotor.

Abstract: A security device includes a substrate and a photoluminescent image on or in the substrate. The image includes at least two different visible light emitting photoluminescent quantum dot compositions, each arranged according to different respective photoluminescent sub-images. The at least two different visible light emitting photoluminescent quantum dot compositions have different emission spectra from one another, and the same or different excitation spectra. The at least two different visible light emitting photoluminescent quantum dot compositions emit different respective visible colours from one another when excited. The respective photoluminescent sub-images are configured such that the photoluminescent image formed by the combination of the respective photoluminescent sub-images is multi-coloured, emitting different visible colours in different laterally offset parts thereof upon excitation of the at least two different visible light emitting photoluminescent quantum dot compositions.

Abstract: A method of manufacturing an image element array for a security device is disclosed.

Abstract: A method of manufacturing a security document, including: providing a polymer substrate having first and second surfaces; and: applying an array of focussing elements to the first surface of the polymer substrate across a first region; forming an image array by: providing a die form having a surface including an arrangement of raised areas and recessed areas defining the pattern; applying a first curable material to the surface of the die form so it substantially fills the recessed areas; bringing a pattern support layer in contact with the surface of the die form so it covers the recessed areas; separating the pattern support layer from the surface of the die form so the first curable material in the recessed areas is removed from the recessed areas and retained on the pattern support layer; and at least partly curing the first curable material in one or more curing steps.

Abstract: A security device is disclosed, comprising an array of focussing elements with regular periodicity in at least a first direction, each focusing element having an optical footprint of which different portions will be directed to the viewer in dependence on the viewing angle; and an array of image elements with regular periodicity in at least the first direction overlapping the array of focusing structures, the image elements representing portions of at least two respective images, and at least one image element from each respective image being located in the optical footprint of each focusing structure.

Abstract: A method of manufacturing a security device is provided. The method comprises providing a substrate, the substrate having opposing first and second surfaces and a relief structure formed in the first surface of the substrate. A reflection enhancing layer is applied over the first surface of the substrate such that the reflection enhancing layer at least partially overlaps the relief structure and such that a first region of the first surface of the substrate does not have the reflection enhancing layer. An absorber layer is applied over the reflection enhancing layer such that the absorber layer at least partially overlaps the reflection enhancing layer and the relief structure where the reflection enhancing layer and the relief structure overlap each other, and such that the absorber layer at least partially overlaps the first region of the first surface of the substrate.

Abstract: A diffractive security device is disclosed including at least a first diffractive structure defined in a carrier layer. The first diffractive structure is an on-axis diffractive zone plate structure of a continuously curved surface configured such that when the device is illuminated by on-axis light a first diffraction pattern generated by the first diffractive structure can be viewed from at least a first side of the device at substantially all viewing angles, the first diffraction pattern exhibiting a reference point or reference line relative to which other features of the first diffraction pattern appear to move when the viewing angle is changed.

Abstract: A diffractive security device is disclosed, including first and second diffractive structures defined in a carrier layer. The first diffractive structure is a diffractive zone plate structure of a continuously curved surface configured such that when the device is illuminated by on-axis light, a first diffraction pattern generated by the first diffractive structure can be viewed from at least a first side of the device at substantially all viewing angles, the first diffraction pattern exhibiting a reference point or reference line relative to which other features of the first diffraction pattern appear to move when the viewing angle is changed. The second diffractive structure is an off-axis diffractive structure configured such that when the device is illuminated by on-axis light a second diffraction pattern generated by the second diffractive structure can be viewed from at least the first side of the device at at least some off-axis viewing angles.

Abstract: A security device is disclosed, comprising forming an array of focussing elements on first region of first surface of focussing element support layer, applying a pedestal layer comprising one transparent material onto first region of first surface of focussing element support layer applying transparent curable material to the pedestal layer or a casting tool carrying surface relief corresponding to focussing elements, over first region forming transparent curable material(s) with the casting tool bringing first surface of focussing element support layer against the casting tool that transparent curable material between the surface relief and the pedestal layer, across first region; and curing transparent curable material(s) on the pedestal layer to retain surface relief in first region; wherein focal length of focussing elements focal plane lies on first surface of focussing element support layer, or beyond first surface of focussing element support layer relative to the location of array of focussing element

Abstract: A method of applying a pattern formed of two different materials to a pattern support layer includes: providing a die form having a surface with recesses defining the pattern; applying a first curable material to a surface first region, received in some of the first region recesses and partially filling a first region recess set; applying a second curable material to some of the surface first region, the second curable material at least partially fills the first set of the first region recesses; contacting a pattern support layer with the die form surface to cover the recesses containing both the first and second curable materials; separating the pattern support layer from the die form surface, the first and second curable materials in the covered recesses removed therefrom and retained on the pattern support layer; and curing the first and second curable materials during and/or after the second and third steps.

Abstract: A security device includes: an elongate focusing structures array, the elongate axes are aligned along a first-direction, the elongate focusing structures parallel to one another periodically along a second-direction is orthogonally to the first-direction, each elongate focusing structure having an optical footprint of different elongate strips will be directed to the viewer in dependence on the viewing angle, the centre line of each optical footprint parallel with the first-direction; image elements-array overlapping the array of elongate focusing structures, the image elements-array representing elongate image slices of at least two respective images, each image slice including one or more image elements, and at least one image slice of each respective image in the optical footprint of each elongate focusing structure.

Abstract: Methods of manufacturing security documents and security devices, and corresponding products, provide a lenticular device effect in a first registration zone. Viewing its appearance from two different angles in this way, the relative positioning of the focussing element array and the image array can be judged to a high degree of accuracy. If the two arrays do not have the desired relative position, this will be clearly apparent since the different first and second images will not be captured at the first and second test viewing angles.

Abstract: A method of making a security device including: (a) forming an array of focussing elements on at least a first region of a focussing element support layer, by: (a)(i) applying a first transparent curable material either to the focussing element support layer or to a casting tool carrying a surface relief corresponding to the focussing elements, over an first sub-region of the first region and applying a second transparent curable material to a second sub-region of the first region laterally offset from the first sub-region, the first and second transparent curable materials having different optical detection characteristics from one another; (a)(ii) forming the first and second transparent curable materials with the casting tool; and (a)(iii) curing the first and second transparent curable materials in the first region, so as to retain the surface relief.

Abstract: A method of manufacturing a security device is provided. The method comprises providing a substrate, the substrate having opposing first and second surfaces and a relief structure formed in the first surface of the substrate. A reflection enhancing layer is applied over the first surface of the substrate such that the reflection enhancing layer at least partially overlaps the relief structure and such that a first region of the first surface of the substrate does not have the reflection enhancing layer. An absorber layer is applied over the reflection enhancing layer such that the absorber layer at least partially overlaps the reflection enhancing layer and the relief structure where the reflection enhancing layer and the relief structure overlap each other, and such that the absorber layer at least partially overlaps the first region of the first surface of the substrate.

Abstract: A security device is disclosed, comprising an array of focussing elements with regular periodicity in at least a first direction, each focusing element having an optical footprint of which different portions will be directed to the viewer in dependence on the viewing angle; and an array of image elements with regular periodicity in at least the first direction overlapping the array of focusing structures, the image elements representing portions of at least two respective images, and at least one image element from each respective image being located in the optical footprint of each focusing structure.

Abstract: A method of manufacturing a pattern on a substrate web includes providing a production tool having a surface relief structure of elevations and depressions. The elevations correspond to a desired pattern. A curable material is applied to the elevations. The material is brought into contact with a substrate web at a first location. The substrate web and surface relief structure are transported together in contact from the first location to a second location spaced from one another along the transport direction of the substrate web. The substrate web is separated from the surface relief structure at the second location whereupon the material forming the pattern is affixed to and carried by the substrate web. The material is cured by exposure to a curing energy source, either between the first and second locations and/or after the substrate web has been separated from the surface relief structure at the second location.

Abstract: A method of producing a security device comprises providing a substrate having a relief structure in/on its surface, the structure provided in a first region of the substrate. The structure in the first region a first recess or a plurality of first recesses in/on the surface of the substrate, the first recess or recesses being recessed with respect to one or more corresponding first land areas of the first region in/on the surface of the substrate. Further comprises applying a colour-shifting coating structure to the relief structure that the colour-shifting coating structure received in the first recess or recesses of the first region and on one or more first land areas. The colour-shifting coating structure applied wherein a thickness of the colour-shifting coating structure in the first recess or recesses is greater than or less than a thickness of the colour-shifting coating structure on one or more first land areas.

Abstract: A security element includes a first layer, the first layer having opposing first and second surfaces, and being formed of a substantially transparent first material having a first refractive index, the first surface of the first layer having formed therein, in a first region, an array of focussing elements. An optically variable effect generating structure is located over the first layer in a second region at least partially overlapping the array of focussing elements in the first region. An array of image elements is arranged over the array of focussing elements such that a first image, formed from at least some of the image elements, is displayed to a viewer viewing the image elements via the array of focussing elements of the first layer. The optically variable effect generating structure is also configured to display, in the second region, a second image to the viewer.

Abstract: A security element including substrate on which is disposed: in first area, a first optically variable device including a diffractive or reflective relief structure and reflection enhancing material following contours of relief structure; and, in second area, a second optically variable device including an iridescent amplitude interference material. First optically variable device is constituted by a plurality of sub-areas arranged in cyclically repeating sequence along predetermined direction of the security element, the plurality of sub-areas collectively forming first area.

Abstract: 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.