Method for authenticating a security element, and optically variable security element
First Claim
Patent Images
1. A method for authenticating an optically variable security element comprising:
- a) capturing an image sequence with at least one individual image of the security element by means of a hand-held sensor device;
b) checking whether at least one predetermined item of optical information is present in at least one individual image of the image sequence,wherein the image sequence comprises more than two individual images of the security element, and wherein at least two individual images of the image sequence are used to check whether the security element comprises an optically variable structure, andwherein the optically variable security element comprises at least one predetermined item of optical information automatically detected by the hand-held sensor device, the at least one predetermined item of optical information being formed by a variation of at least one relief parameter of a relief structure of the security element between at least one first zone and at least one second zone of the security element, wherein the relief structure provided in the first and/or second zone is a grating with grating lines which are curved circularly, parabolically or in the form of wavy lines, with a periodic azimuthal variation, wherein in at least one of the partial regions the period of the azimuthal variation and/or the grid width of the one- or two-dimensional grid is less than 300 μ
m.
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Abstract
The invention relates to a method for authenticating an optically variable security element (1), in particular a diffractive security element, with the steps:
- a) capturing an image sequence with at least one individual image of the security element (1) by means of a sensor (31), in particular a hand-held device (3), preferably a smartphone, tablet or a PDA;
- b) checking whether at least one predetermined item of optical information is present in at least one individual image of the image sequence.
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Citations
69 Claims
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1. A method for authenticating an optically variable security element comprising:
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a) capturing an image sequence with at least one individual image of the security element by means of a hand-held sensor device; b) checking whether at least one predetermined item of optical information is present in at least one individual image of the image sequence, wherein the image sequence comprises more than two individual images of the security element, and wherein at least two individual images of the image sequence are used to check whether the security element comprises an optically variable structure, and wherein the optically variable security element comprises at least one predetermined item of optical information automatically detected by the hand-held sensor device, the at least one predetermined item of optical information being formed by a variation of at least one relief parameter of a relief structure of the security element between at least one first zone and at least one second zone of the security element, wherein the relief structure provided in the first and/or second zone is a grating with grating lines which are curved circularly, parabolically or in the form of wavy lines, with a periodic azimuthal variation, wherein in at least one of the partial regions the period of the azimuthal variation and/or the grid width of the one- or two-dimensional grid is less than 300 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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57. An optically variable security element for authentication by means of a smartphone or PDA, the optically variable security element comprising at least one predetermined item of optical information which can be automatically detected using a sensor of the smartphone or PDA,
wherein the at least one predetermined item of optical information is formed by a variation of at least one relief parameter of a relief structure of the security element between at least one first zone and at least one second zone of the security element, wherein the relief structure provided in the first and/or second zone is a grating with grating lines which are curved circularly, parabolically or in the form of wavy lines, with a periodic azimuthal variation, wherein in at least one of the partial regions the period of the azimuthal variation and/or the grid width of the one- or two-dimensional grid is less than 300 μ
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59. An optically variable security element for authentication by means of a smartphone or PDA, the optically variable security element comprising at least one predetermined item of optical information which can be automatically detected using a sensor of the smartphone or PDA,
wherein the at least one predetermined item of optical information is formed by a variation of at least one relief parameter of a relief structure of the security element between at least one first zone and at least one second zone of the security element, wherein the relief structure provided in the first and/or second zone is a grating, and wherein the at least one relief parameter is a spatial frequency, the spatial frequency of the grating being between 1000 lines/mm and 500 lines/mm.
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62. An optically variable security element for authentication by means of a smartphone or PDA, the optically variable security element comprising at least one predetermined item of optical information which can be automatically detected using a sensor of the smartphone or PDA,
wherein the at least one predetermined item of optical information is generated by a diffractive effect in a wavelength range outside a visible spectrum, in an infrared range, wherein the diffractive effect is generated by a zero-order diffractive structure with a transparent layer made from a highly refractive ZnS material, wherein the zero-order diffractive structure is a sinusoidal grating with a grating depth of 100-300 nm.
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65. A method for authenticating an optically variable security element comprising:
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a) capturing an image sequence with at least one individual image of the security element by means of a hand-held sensor device; b) checking whether at least one predetermined item of optical information is present in at least one individual image of the image sequence, wherein the image sequence comprises more than two individual images of the security element, and wherein at least two individual images of the image sequence are used to check whether the security element comprises an optically variable structure, and wherein the optically variable security element comprises at least one predetermined item of optical information automatically detected by the hand-held sensor device, the at least one predetermined item of optical information being formed by a variation of at least one relief parameter of a relief structure of the security element between at least one first zone and at least one second zone of the security element, wherein the relief structure provided in the first and/or second zone is a grating, and wherein the at least one relief parameter is a special frequency the spatial frequency of the grating being between 1000 lines/mm and 500 lines/mm.
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66. A method for authenticating an optically variable security element comprising:
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a) capturing an image sequence with at least one individual image of the security element by means of a hand-held sensor device; b) checking whether at least one predetermined item of optical information is present in at least one individual image of the image sequence, wherein the image sequence comprises more than two individual images of the security element, and wherein at least two individual images of the image sequence are used to check whether the security element comprises an optically variable structure, and wherein the optically variable security element comprises at least one predetermined item of optical information automatically detected by the hand-held sensor device, wherein the at least one predetermined item of optical information is generated by a diffractive effect in a wavelength range outside the visible spectrum, in the infrared range, wherein the diffractive effect is generated by a zero-order diffractive structure with a transparent layer made from a highly refractive ZnS material, wherein the zero-order diffractive structure is a sinusoidal grating with a grating depth of 100-300 nm.
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Specification