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公开(公告)号：EP3087421B1
公开(公告)日：2019-07-31
申请号：EP13819039.2
申请日：2013-12-23
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公开(公告)号：EP2877884A2
公开(公告)日：2015-06-03
申请号：EP13739739.4
申请日：2013-07-24
发明人： SQALLI, Omar , PIRES, David , BASSET, Guillaume , STALDER, Martin
CPC分类号： G02B6/34 , G02B6/2793 , G02B6/29323 , G02B6/29329 , G02B6/29397
摘要： The present invention concerns a method for constructing a light coupling system wherein a grating is manufactured on the surface of a multimode waveguide and defines the entrance of the waveguide for an incident light beam, said grating comprising a repetition of patterns. The grating is defined by a set of parameters comprising: • grating period (P), separating two adjacent patterns, • grating depth (d) between the highest and the lowest point of the pattern, • incident angle mean value (θ) of the incident light with respect to the waveguide. The method comprises a step of optimization of the set of parameters to obtain an optimized second set of parameters, in order to obtain a transmission efficiency (Ce) of the incident light into said waveguide for the first or the second diffractive order exceeding 35% for unpolarized light, or exceeding 50% for polarized light, at a given wavelength of the incident light.
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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：EP3256776B1
公开(公告)日：2019-06-12
申请号：EP15705946.0
申请日：2015-02-10
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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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公开(公告)号：EP3256776A1
公开(公告)日：2017-12-20
申请号：EP15705946.0
申请日：2015-02-10
CPC分类号： G02B6/0016 , G02B6/0018 , G02B6/0023 , G02B6/003 , G02B6/0031 , G02B6/0036 , G02B6/005 , G02B6/0051 , G02B6/0055 , G02B6/0063 , G02B6/0068 , G02B6/0076 , G02B6/0083
摘要： The white light source provides a uniform outcoupled white light beam.
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公开(公告)号：EP3120071A1
公开(公告)日：2017-01-25
申请号：EP14716254.9
申请日：2014-03-20
CPC分类号： G02B23/2461 , G02B6/00 , G02B6/0016 , G02B6/0036 , G02B23/2423 , G02B23/26
摘要： An imaging system suitable to provide an image of a surface portion of an object is disclosed. The system includes a light source arranged to provide a light beam, at least a first optical waveguide having a first face and having a second face opposite to the first face, the first face having an incoupling surface. The optical waveguide includes an outcoupling surface, a first diffraction grating arranged on the optical waveguide, and an imaging subsystem arranged to the outcoupling surface. The first diffraction grating is arranged to outcouple at least a fraction of the light beam.
摘要翻译： 一种成像系统，适于提供物体的表面部分的图像，包括： - 设置成提供光束（12）的光源（10）， - 至少第一光波导（20），其具有第一面（20a ），并且具有与所述第一面相对的第二面（20b），所述第一面包括入耦表面（21），所述光波导包括外耦合表面（22）， - 布置在光波导上的第一衍射光栅（28） ， - 布置成所述外耦合表面的成像子系统（50），其中 - 第一衍射光栅布置成外耦合所述光束的至少一部分），所述第一衍射光栅被布置成在 距所述第一衍射光栅的距离D，所述第一衍射光栅被布置成引导所述输出耦合的光以照亮位于所述照明区域的所述物体的表面部分，所述第一衍射光栅还被布置成耦合 通过将所述外耦合的光反射在所述物体上而提供的返回光束进入所述光波导。 所述外耦合表面的成像子系统提供至少所述物体的表面部分的图像。
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公开(公告)号：EP3087421A1
公开(公告)日：2016-11-02
申请号：EP13819039.2
申请日：2013-12-23
CPC分类号： G02B6/124 , G01N21/7743 , G02B5/1809 , G02B5/203 , G02B6/12007 , G02B6/29325 , G02B6/34 , G02B27/4272 , G02B2006/12107
摘要： A guided mode resonance device, comprising—a substrate,—a waveguide,—a grating structure associated with said waveguide, said grating structure being arranged to an incident surface of said substrate, said incident surface being intended to receive an incident light beam provided by at least one light source, said incident light beam having an incident angle, defined relative to the normal of said waveguide, said grating structure comprising at least one elementary structure comprising at least a first-type grating structure and at least a second-type grating structure,—wherein:—said waveguide is arranged to transfer light from the first-type grating structures to the second-type grating structure and also to transfer light from the second-type grating structures to the first-type grating structure,—said first-type grating structure is arranged to couple out a first light beam,—said second-type grating structure is arranged to couple out a second light beam,—said first light beam having a different spectral distribution than said second light beam.
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