公开(公告)号：WO2017001424A1

公开(公告)日：2017-01-05

申请号：PCT/EP2016/065049

申请日：2016-06-28

Applicant: DEMAX - HOLOGRAMS AD

Inventor： MONOVSKI, Valentin Konstantinov ,  STOILOV, Georgi Ivanov ,  DOBREV, Mario Rumenov ,  IVANOVSKYI, Andrii ,  POHAN, Ihnat ,  BALDZHIEV, Angel Georgiev ,  LASKOV, Evgeniy Anastasov ,  TONCHEV, Dimitar Antonov ,  DELCHEV, Ivo Rumenov

IPC: G02B5/02 ,  B42D25/328 ,  G02B5/18

CPC classification number: G02B5/0252 ,  B42D25/328 ,  G02B5/1861

Abstract: The present invention provides a multilayer light-diffracting structure (10) comprising a transparent diffraction layer (5) and a light transforming layer (6) in contact with the diffraction layer (5). The diffraction layer (5) comprises superposed first and second diffraction gratings oriented at an angle (α) to each other. The first and second diffraction gratings each comprise elements (9) having a triangular cross-section in a depth-wise direction of the diffraction layer (5). A period (X) of the first diffraction grating and a period (Y) of the second diffraction grating are each in a range of from 0.2 to 0.8 micrometres. The diffraction layer (5) has a first refractive index n 1 (λ) as a function of wavelength (λ) and the light transforming layer (6) has a second refractive index n 2 (λ) as a function of wavelength (λ). The absolute value of the difference between the first refractive index n 1 (λ) and the second refractive index n 2 (λ) is greater than 0.5 for the same wavelength (λ). The multilayer light-diffracting structure (10) can appear black if viewed normal to its surface, can be manufactured by a process using stamping or pressing, and can be used as a security feature of an item of value, such as a bank card, banknote, passport or identity card, branded goods, ticket or legal document, for example.

Abstract translation: 本发明提供一种包含透明衍射层（5）和与衍射层（5）接触的光转换层（6）的多层光衍射结构（10）。 衍射层（5）包括以彼此成角度（α）取向的重叠的第一和第二衍射光栅。 第一和第二衍射光栅各自包括在衍射层（5）的深度方向上具有三角形横截面的元件（9）。 第一衍射光栅的周期（X）和第二衍射光栅的周期（Y）分别在0.2〜0.8微米的范围内。 衍射层（5）具有作为波长（λ）的函数的第一折射率n1（λ），并且光转换层（6）具有作为波长（λ）的函数的第二折射率n2（λ）。 对于相同的波长（λ），第一折射率n1（λ）和第二折射率n2（λ）之间的差的绝对值大于0.5。 多层光衍射结构（10）如果正视其表面可以看起来是黑色的，可以通过使用冲压或压制的方法制造，并且可以用作有价值物品的安全特征，例如银行卡， 钞票，护照或身份证，品牌商品，机票或法律文件。

公开(公告)号：WO2017139857A1

公开(公告)日：2017-08-24

申请号：PCT/BG2016/000001

申请日：2016-01-15

Applicant: DEMAX - HOLOGRAMS AD

Inventor： MONOVSKI, Valentin, Konstantinov ,  IVANOVSKYI, Andrii ,  STOILOV, Georgi, Ivanov ,  DOBREV, Mario, Rumenov ,  POHAN, Ihnat ,  BALDZHIEV, Angel, Georgiev ,  LASKOV, Evgeniy, Anastasov ,  TONCHEV, Dimitar, Antonov ,  DELCHEV, Ivo, Rumenov

IPC: B42D25/324 ,  B42D25/328

CPC classification number: B42D25/324 ,  B42D25/328

Abstract: The invention relates to a relief optical device for creating non-spectral colour images. The relief optical device includes a set of areas of unspecified shape, filled with relief periodic diffraction patterns having two levels of depth, whereby according to the invention the period of the patterns (2) in the areas (3) varies from an area to an area in random order within the range from 0,6μm to 5μm, preferably with a step less than 0,050μm, the angle of inclination of the grooves (φ) of the patterns varies from an area to an area in random order from 0 to 180 degrees with a step less than 0,7 degrees, the size of the areas (3) is within the range from 5μm to 50μm and the depth of the relief (h) of the patterns (2), which preferably varies within the limits of 0,1 - 0,8μm, determines the colour hue of the non-spectral colours.

Abstract translation: 本发明涉及一种用于产生非光谱彩色图像的浮雕光学装置。 该浮雕光学装置包括一组未规定形状的区域，其填充有具有两级深度的浮雕周期性衍射图案，由此根据本发明，区域（3）中的图案（2）的周期从一个区域变化到 区域以0.6μm至5μm的范围内的随机顺序，优选地具有小于0.050μm的台阶，图案的凹槽（φ）的倾斜角度从面积到以随机顺序从0至180的区域变化 度数小于0.7度，区域（3）的大小在5μm至50μm的范围内，并且图案（2）的浮雕深度（h）优选地在范围 0,1 - 0,8μm，决定了非光谱色彩的色调。

公开(公告)号：WO2023044546A1

公开(公告)日：2023-03-30

申请号：PCT/BG2021/050003

申请日：2021-11-09

Applicant: DEMAX - HOLOGRAMS AD

Inventor： MONOVSKI, Valentin Konstantinov ,  AKUZOV, Danail Trendafilov ,  IVANOVSKYI, Andrii ,  POHAN, Ihnat ,  STOILOV, Georgi Ivanov ,  DOBREV, Mario Rumenov ,  DELCHEV, Ivo Rumenov

IPC: G03H1/00 ,  G03H1/02 ,  B42D25/328

Abstract: The invention refers to a color holographic foil for protection of goods and documents from forgery and falsification. It includes successively placed foil base (1), release layer (2), embossing layer (3), reflective layer (4) and adhesive layer (5). The embossing layer comprises smooth areas (6) and micro-relief areas (7). The thickness of the optical reflective layer (4) is inversely proportional to the depth of the depressions in the micro-relief areas. At least two of the micro-relief areas are dyed areas (10) with embossing layer colored with a dye in different saturations of a single color tone. The saturation is directly proportional to the depth of the depressions. At least one dyed area is a multi-bonded area (11), having at least one micro-relief boundary (12) and at least one smooth boundary (13). The topography of the micro-relief in said multi-bonded areas is different from the topography of the neighboring dyed areas.