Abstract:
PROBLEM TO BE SOLVED: To provide a security element difficult to copy.SOLUTION: The security element includes a layer composite which has microscopically fine, optically effective structures 9 of a surface pattern, which are embedded between two layers 5;6. The microscopically fine, optically effective structures 9 is shaped into an interface 8 between two layers 5;6 in surface parts of a holographically non-copyable security feature in a plane of the surface pattern, which is defined by co-ordinate axes x and y. The optically effective structure 9 in at least one surface part is a diffraction structure (S;S*;S**) formed by additive superimposition of a macroscopic superimposition function (M) with a microscopically fine relief profile (R). The relief profile (R), the superimposition function (M) and also the diffraction structure (S;S*;S**) are functions of the co-ordinates x and y.
Abstract translation:要解决的问题:提供难以复制的安全元件。解决方案:安全元件包括层复合材料,其具有嵌入在两个层5之间的表面图案的微观,光学有效的结构9。 微观上光学有效的结构9在表面图案的平面中的全息不可复制的安全特征的表面部分中的两层5和6之间形成界面8,其由坐标轴x和y 。 至少一个表面部分中的光学有效结构9是通过宏观叠加函数(M)与微观叠加轮廓(R)的叠加叠加形成的衍射结构(S; S *; S **)。 浮雕轮廓(R),叠加函数(M)以及衍射结构(S; S *; S **)是坐标x和y的函数。
Abstract:
PROBLEM TO BE SOLVED: To provide an improved security element to safely protect a security document and the process for the manufacture of the same. SOLUTION: The invention concerns a security element 3' having a top side and an underside and a process for the manufacture thereof. The security element has a transparent layer 33' with a non-homogenous refractive index, in which a plurality of Bragg planes are formed by a refractive index variation. The transparent layer 33' is of a layer thickness of 5 to 200 μm and the transparent layer 33' has a plurality of first zones 41 of a smallest dimension of less than 300 μm, which are arranged in accordance with a first grid raster in a one-dimensional or two-dimensional succession in mutually adjacent relationship and in which the Bragg planes of the transparent layer are respectively shaped to provide a respective transmissive optical imaging function. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
The invention relates to a multilayer body (2) having a transparent first layer (13). In a first region (31) of the transparent first layer (13) a plurality of microlenses (21) are moulded, which are arranged in accordance with a microlens grid. Furthermore, the multilayer body (2) has a second layer (12) arranged beneath the first layer (13) and in a fixed position with respect to the first layer (13), the second layer having a plurality of microimages (22) which, in order to generate first optically variable information, are arranged in accordance with a microimage grid and in each case overlapping at least in areas with one of the microlenses (21) of the microlens grid. The grid widths (41, 42) of the microimage grid and the microlens grid are each less than 300 µm in at least one direction in space.
Abstract:
The invention relates to a film element with a replicating layer (43), wherein an optically active surface structure (27) is moulded into a first surface of the replicating layer. The surface structure is formed in at least a first region of the film element (35) from a first diffractive surface relief (46) made up of a series of sequential elements (47) following a first envelope (47), wherein the elements are each made up of an element surface (48) parallel to a base surface and at least one flank adjacent to the neighbouring element surface or element surfaces, the element surfaces (48) of neighbouring elements being separated in a direction perpendicular to the base plane with a first optical separation or a multiple of said first optical separation, wherein the first optical separation is between 150 nm and 800 nm, preferably between150 nm and 400 nm. The first envelope (47) has a spatial frequency of between 100 L/mm and 2000 L/mm and an optical depth of more than 450 nm and the relief form and the spatial frequency f the envelope (47) are selected such that the incident light is refracted in one or more first directions to represent a first piece of information the colour value of which is further determined by the first optical separation.
Abstract translation:本发明涉及一种具有复制层(43)的膜元件,其中光学有源表面结构(27)被模制在复制层的第一表面中。 表面结构是在至少从第一衍射表面凹凸的膜元件(35)的第一区域(46)形成从多个连续的,第一包络(47)下面的元件,其中每个元件包括一个基本上平行于 由排列成一基底构件的表面(48)和至少一个垂直于底座平面邻接相邻元件的相邻元件区域或元件的表面边缘,所述元件表面(48)在一个方向上与第一光学距离或所述第一光学距离的倍数,其特征在于,隔开 第一光学距离在150nm和800nm之间,优选在150nm和400nm之间。 第一包络(47)具有100升/毫米和2000 L /毫米,大于450nm的光学深度,和凸版形式和包络的空间频率之间(47)选择为使得的空间频率在入射光 或衍射多个第一方向以显示其颜色值进一步由第一光学距离确定的第一信息。
Abstract:
The invention relates to a security document with a transparent security element (12) with a structural layer arranged in a window or in a transparent section of the security document, a first section (12f) of the structural layer comprising an asymmetrical diffractive relief structure, the first section (12f) having an unexpectedly different optical effect when the security document is viewed from the front and from the back.
Abstract:
The invention relates to a security element comprising at least one optically variable element. According to the invention, at least one layer of said optically variable element is embodied as an electrically active layer (13, 14) of an electronic component and/or an electronic switching circuit.
Abstract:
A light-diffracting binary grating structure has a microscopic mesa structure (2) whose plateaux (5) are separated by troughs (4) with an essentially rectangular cross-section, the arrangement of the troughs (4) being repeated periodically. At least N troughs separate the plates (5) within one period (T) of the mesa structure (2), N being a whole number and being greater than 2. The mesa structure (2)is an additive superposition of N phase-displaced rectangular structures which have the same period (T) of the mesa structure (2). Each of the rectangular structures has a phase displacement, so that the plates (5) of one rectangular structure fall into the troughs (4) of the N-1 other rectangular structures. Additionally, the resulting mesa structure (2) only has a single trough between two plates (5), this trough having a width that is greater than one seventh of the period (T). The binary grating structures are suitable for use in optically diffractive security elements, since such binary grating structures cannot be copied with holographic means.
Abstract:
The invention relates to a method for authenticating an optically variable security element (1), in particular a diffractive security element, said method involving steps: a) capturing an image sequence comprising at least one individual image of the security element (1) by means of a sensor (31), in particular of a hand-held device (3), preferably a smartphone, tablet or PDA; and b) verifying whether at least one piece of predefined optical information is included in at least one individual image of the image sequence.
Abstract:
The invention relates to a method for producing a multilayer body (100) having a partially molded first layer (3m) and to a multilayer body produced according to said method. The method is characterized in that a diffractive first relief structure (4) is molded into a first area of a replicating layer (3) of the multilayer body, the first layer (3m) is applied to the replicating layer (3) in the first area and in a second area in which the first relief structure is not molded into the replicating layer (3), a photosensitive layer (8) is applied to the first layer (3) or a photosensitive washing mask (8) is applied as the replicating layer, the photosensitive layer or the washing mask are irradiated through the first layer (3m), thereby irradiating the photosensitive layer or washing mask (8) differently in the first and in the second area depending on the first relief structure, and the first layer (3m) is removed, while using the irradiated photosensitive layer or the washing mask (8) as the mask layer, in the first area, but not in the second area, or is removed in the second area, but not in the first area.
Abstract:
The invention relates to a method for producing a multilayer body (100) having a partially molded first layer (3m). The method is characterized in that a diffractive first relief structure having a high depth/width ratio of the individual structure elements, especially a depth/width ratio of > 0.3, is molded into a first area (5) of a replicating layer (3) of the multilayer body and the first layer (3m) is applied with a constant surface density to the replicating layer (3) in the first area (5) and in a second area (4, 6) in which the first relief structure is not molded into the replicating layer (3), and the first layer (3m) is partially removed depending on the first relief structure, so that the first layer (3m) is partially removed in the first area (5) or in the second area (4, 6) but not in the second (46) or in the first area (5).