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公开(公告)号：EP0165021A2
公开(公告)日：1985-12-18
申请号：EP85304031.9
申请日：1985-06-06
Applicant: Canadian Patents and Development Limited
Inventor： Dobrowolski, Jerzy A. , Ho, Fang C. , Waldorf, Allan J.
Abstract: A hard to simulate, readily distinguishable from counterfeits, optical interference authenticating device comprises a substrate, and at least one optical interference, form depicting coating on the substrate and partially covering the substrate to delineate a known, distinct and readily distinguishable form thereon. The said at least one optical interference coating comprises at least one optical interference layer having known spectral reflectance and spectral transmittance characteristics when viewed at at least one particular angle so that the form is visible in particular colouration at the or each said particular angle of incidence of light thereon by reflected or transmitted light. At least one other optical interference coating may be provided on the substrate and may completely cover one side of it and the substrate may be transparent, semi-transparent or opaque, depending how the spectral characteristics are to be observed. A marginal edge portion of the form depicting coating may taper in thickness to provide a multi-coloured auriole around the form. When a plurality of form depicting coatings are provided they may partially overlie one another to provide a more complex pattern.
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2.发明公开
公开(公告)号：EP0181770A2
公开(公告)日：1986-05-21
申请号：EP85308103.2
申请日：1985-11-07
Applicant: Canadian Patents and Development Limited Société Canadienne des Brevets et d'Exploitation Limitée
Inventor： Dobrowolski, Jerzy A. , Waldorf, Allan J.
CPC classification number: B42D25/41 , B42D25/00 , B42D25/40 , B42D25/45 , B42D2033/04 , B42D2033/10 , B42D2033/30 , B42D2033/32 , B42D2035/20 , B42D2035/30 , G06K9/2036 , G07F7/086
Abstract: Hard to simulate, readily distinguishable from counterfeits, optical interference authenticating devices are provided by depositing two coatings (28,30 Fig. 2; 30,32, Fig. 4) on a substrate (26), each coating comprising at least one optical interference layer, the material of each layer being selected so that the two coatings together and separately have different spectral reflectance and spectral transmittance characteristics at different angles of incidence of light thereon. The substrate may be, for example, a polyester film and a first one of the coatings is sufficiently radiation absorbing of, say infra red radiation that at least one portion of that coating can be removed by an infra red laser beam (34) through, for example, a mask (36) to provide a readily distinguishable pattern (42) on the substrate. The first coating (30) may be, for example, a multilayer absorber coating containing Inconel, aluminium or some other suitable material, while the other coating (28, Fig. 2; 32, Fig. 4) which is insufficiently radiation absorbing by, for example, infra red radiation to be substantially resistant to excavation solely by the infra red laser beam may be, for example, a multilayer coating of Zr0 2 or Si0 2 etc. If the first coating is outermost from the substrate (Fig. 2) then only the first coating will be excavated by the infra red laser beam. If the second coating is outermost from the substrate (Fig. 4) then both the first and the second coatings will be excavated by the infra red laser beam.
Abstract translation: 很难模拟，从假冒容易区分的，光学干涉鉴别装置通过沉积两种涂层提供（28，图30中2 ;. 30，32，图4）的基板（26）上，每个涂布包括至少一个光学干涉 层，每个层的材料被选择，以便没有两个涂层在一起并分别具有在其上的光的不同入射角度不同的光谱反射率和光谱透射率特性。 所述基材可以是，例如，聚酯膜和涂层中的第一个被充分地辐射吸收的，比方说红外辐射确实可以通过在红外激光束（34）通过去除没有涂层的至少一个部分， 对于实施例，掩模（36），以提供在基片上的易区分的图案（42）。 所述第一涂层（30）可以是，例如，一个多层吸收涂层含有铬镍铁合金，铝或某些其它合适的材料，而其它涂层（28，图2; 32，图4），这是不充分的吸收辐射通过， 例如，红外辐射是挖掘基本上耐受仅由红外激光束可以是，例如，氧化锆或SiO 2等。如果所述第一涂层为外部的一个多层涂层最从底物（图2），然后只 第一涂层将由红外激光束被挖掘。 如果第二涂层是外从底物（图4）最然后，两个第一和第二涂层将由红外激光束被挖掘。
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公开(公告)号：EP0165021B1
公开(公告)日：1989-03-01
申请号：EP85304031.9
申请日：1985-06-06
Applicant: Canadian Patents and Development Limited
Inventor： Dobrowolski, Jerzy A. , Ho, Fang C. , Waldorf, Allan J.
Abstract: A hard to simulate, readily distinguishable from counterfeits, optical interference authenticating device comprises a substrate, and two optical interference coatings in interfacial contact on one side of the substrate, one of the optical interference coatings being a contrast coating, the other of the optical interference coatings being a form depicting coating for depicting a form relative to the contrast coating. The optical interference coatings each comprising at least one optical interference layer the material and thickness of which has been selected for the coatings to have different, particular, known spectral reflectance and spectral transmittance characteristics from one another when viewed at a particular angle, such that the form depicting coating is visible by reflected or transmitted light of particular coloration, when viewed at the particular angle, at least in part by optical interference of light partically reflected or transmitted at the interfacial contact. A further optical interference contrast coating may be provided on the substrate and the form depicting coating may be sandwiched between the contrast coatings. The substrate may be transparent, semi-transparent or opaque, depending how the spectral characteristics are to be observed. A marginal edge portion of the form depicting coating may taper in thickness to provide a multicolored auriole around the form. A plurality form depicting coatings may be provided which overlie one another to provide a more complex pattern.
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公开(公告)号：EP0165021A3
公开(公告)日：1986-06-11
申请号：EP85304031
申请日：1985-06-06
Applicant: Canadian Patents and Development Limited
Inventor： Dobrowolski, Jerzy A. , Ho, Fang C. , Waldorf, Allan J.
Abstract: A hard to simulate, readily distinguishable from counterfeits, optical interference authenticating device comprises a substrate, and at least one optical interference, form depicting coating on the substrate and partially covering the substrate to delineate a known, distinct and readily distinguishable form thereon. The said at least one optical interference coating comprises at least one optical interference layer having known spectral reflectance and spectral transmittance characteristics when viewed at at least one particular angle so that the form is visible in particular colouration at the or each said particular angle of incidence of light thereon by reflected or transmitted light. At least one other optical interference coating may be provided on the substrate and may completely cover one side of it and the substrate may be transparent, semi-transparent or opaque, depending how the spectral characteristics are to be observed. A marginal edge portion of the form depicting coating may taper in thickness to provide a multi-coloured auriole around the form. When a plurality of form depicting coatings are provided they may partially overlie one another to provide a more complex pattern.
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