阅读说明：本技术 具有光学可变的表面图案的防伪元件 (Security element with optically variable surface pattern ) 是由 R.德梅尔 K.H.谢勒 M.R.J.谢勒 于 2020-05-08 设计创作，主要内容包括：本发明涉及一种用于为有价物品提供安全保障的防伪元件(12),其具有光学可变的表面图案(14),所述防伪元件在预设的观察角(16-A)以反射光观察时产生具有不同的亮度值的预设的灰度图像(18-A),其中,光学可变的表面图案(14)由多个基本上以辐射光学的方式作用的棱面(20)形成,所述棱面的横向尺寸小于100μm并且所述棱面的定向分别以相对于表面图案(14)的平面的倾斜角α和处于表面图案(14)的平面中的方位角为特征,其中,棱面的定向分别相应于配属的特征观察角(24),并且灰度图像(18-A)由光学可变的表面图案(14)的多个棱面(20)产生,其中,灰度图像(18-A)的不同的亮度值通过参与图像产生的棱面(20)的特征观察角(24)与预设的观察角(16-A)之间的不同大小的角差(δ)产生,其中,较小的角差相应于较亮的灰度并且较大的角差相应于较暗的灰度。(The invention relates to a security element (12) for securing valuable items, comprising an optically variable surface pattern (14) which, when viewed at a predetermined viewing angle (16-A) in reflected light, produces a predetermined gray-scale image (18-A) having different brightness values, wherein the optically variable surface pattern (14) is formed by a plurality of substantially radiation-optically active edge surfaces (20) having a transverse dimension of less than 100 [ mu ] m and having a width of less than 100 [ mu ] mThe orientation of the facets being at an inclination angle alpha relative to the plane of the surface pattern (14) and an azimuth angle in the plane of the surface pattern (14), respectively Is characterized in that the orientation of the facets corresponds in each case to an associated characteristic viewing angle (24), and in that a gray-scale image (18-A) is produced from a plurality of facets (20) of the optically variable surface pattern (14), wherein different brightness values of the gray-scale image (18-A) are produced by different angular differences (delta) of different magnitudes between the characteristic viewing angle (24) of the facets (20) involved in the image production and a predetermined viewing angle (16-A), wherein smaller angular differences correspond to brighter gray-scales and larger angular differences correspond to darker gray-scales.)