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公开(公告)号：EP3205512A1
公开(公告)日：2017-08-16
申请号：EP16154813.6
申请日：2016-02-09
IPC分类号： B42D25/328
CPC分类号： B42D25/328
摘要： An optical security device is disclosed comprising a plurality of low mode resonating waveguide grating elements, each comprising two resonant waveguide gratings.
Said two resonant waveguide gratings are arranged to be in optical communication such that, upon illumination of the resonating waveguide grating elements with a light source, a pair of outcoupled light beams is provided by each of the resonating waveguide grating elements and is directed to a detector.
The center of each of said at least two resonating waveguide grating elements is arranged on a first nonlinear curve defined in the plane of the optical security device and so that an outcoupled fraction of a first incoupled portion and an outcoupled fraction a second incoupled portion propagate in the same direction and are both directed towards a detector center.
The optical security device is intended to be observable only in a predetermined relative position and orientation of a lightsource, the optical security device and a detector. At this predetermined relative position a bright and unique pattern is displayed identifying the presence and content of the optical security device.
An optical security control system is also disclosed and comprises a light source , the optical security device and a detector.摘要翻译： 公开了一种光学安全装置，其包括多个低模谐振波导光栅元件，每个包括两个谐振波导光栅。 所述两个谐振波导光栅被布置为进行光通信，使得在利用光源照射谐振波导光栅元件时，由每个谐振波导光栅元件提供一对耦合输出的光束并且将其引导至检测器 。 所述至少两个谐振波导光栅元件中的每一个的中心布置在限定在光学安全装置的平面中的第一非线性曲线上，并且使得第一耦合部分的耦出部分和第二耦入部分的耦出部分在 相同的方向并且都指向检测器中心。 光学安全装置旨在仅在光源，光学安全装置和检测器的预定相对位置和方向上可观察到。 在该预定的相对位置处，显示明亮且独特的图案，以识别光学安全装置的存在和内容。 还公开了一种光学安全控制系统，其包括光源，光学安全装置和检测器。
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公开(公告)号：EP3414617B1
公开(公告)日：2020-02-12
申请号：EP16819905.7
申请日：2016-12-20
IPC分类号： G02B27/01 , B42D25/328
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公开(公告)号：EP3205512B1
公开(公告)日：2018-06-13
申请号：EP16154813.6
申请日：2016-02-09
IPC分类号： B42D25/328
CPC分类号： B42D25/328
摘要： An optical security device is disclosed comprising a plurality of low mode resonating waveguide grating elements, each comprising two resonant waveguide gratings. Said two resonant waveguide gratings are arranged to be in optical communication such that, upon illumination of the resonating waveguide grating elements with a light source, a pair of outcoupled light beams is provided by each of the resonating waveguide grating elements and is directed to a detector. The center of each of said at least two resonating waveguide grating elements is arranged on a first nonlinear curve defined in the plane of the optical security device and so that an outcoupled fraction of a first incoupled portion and an outcoupled fraction a second incoupled portion propagate in the same direction and are both directed towards a detector center. The optical security device is intended to be observable only in a predetermined relative position and orientation of a lightsource, the optical security device and a detector. At this predetermined relative position a bright and unique pattern is displayed identifying the presence and content of the optical security device. An optical security control system is also disclosed and comprises a light source , the optical security device and a detector.
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