Optically Variable Security Arrangement with Relief Grid
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Solution Overview
Problem
Current optically variable security arrangements for protecting valuables are either complex and costly to produce or lack visually appealing movement effects when tilted, making them unsuitable for widespread economic applications.
Innovation Solution
An optically variable security arrangement featuring a first partial element with a two-dimensional relief grid and a second partial element with a point or line grid, where the grid widths differ slightly and are modulated, creating a movement effect when tilted. The relief elements are formed from micromirrors with pseudo-randomly modulated normal vectors, producing a concave or convex curvature, and are arranged aperiodically to enhance visual appeal and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If holograms and hologram-like designs are used to achieve visually appealing movement effects, then the visual appeal and movement effects are improved, but the manufacturing complexity and cost increase significantly
Solution Approach 1:
The patent uses a relief grid pattern that optically simulates the effect of complex holograms through a much simpler manufacturing process. The relief elements are embossed or printed onto the substrate, creating an optical illusion of three-dimensional movement effects without requiring actual holographic manufacturing technology. This copying approach achieves visual similarity to complex solutions while maintaining manufacturing simplicity.
Solution Approach 2:
The patent varies the relief depth, grid spacing, and orientation of the relief elements to create different optical effects at different viewing angles. By changing these physical parameters of the relief structure, the patent achieves visually appealing movement effects that resemble complex holograms, but through simple geometric modifications rather than complex manufacturing processes.
2Device complexity
If simple grid patterns are used for the security arrangement, then the manufacturing cost is reduced, but the visual appeal and movement effects when tilted are insufficient
Solution Approach 1:
The patent employs asymmetric relief elements with varying depths, shapes, and orientations within the grid pattern. This asymmetry creates complex optical interference patterns when light reflects from different angles, producing visually appealing movement effects. The asymmetric design breaks the monotony of simple regular grids while maintaining the overall structural simplicity and manufacturability of a grid-based system.
Solution Approach 2:
The patent adds the dimension of relief depth to a two-dimensional grid pattern, creating a three-dimensional surface structure. This additional dimensional aspect causes light to reflect at different angles and paths depending on the viewing angle, generating dynamic movement effects that enhance visual appeal while keeping the base structure simple and grid-based for easy manufacturing.
3Measurement precision
If the grid spacing is made very small to increase security, then the authenticity verification precision is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent uses a grid spacing that is small enough to provide good verification precision but not excessively small to the point where manufacturing becomes prohibitively difficult. The relief elements are designed with dimensions and spacing that strike a balance - small enough to create fine optical patterns for accurate verification, but large enough to be manufactured with standard embossing or printing techniques without requiring ultra-precise manufacturing equipment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a simple, cost-effective optically variable security arrangement that exhibits visually appealing movement effects when tilted, effectively enhancing the security and authenticity verification of valuables while being suitable for various applications, including banknotes and other documents.
Implementation Method 1
grid elements, which are each formed from at least two relief elements reflecting in different directions
Implementation Method 2
the relief elements are formed from micromirrors with pseudo-randomly modulated normal vectors, producing a concave or convex curvature
Implementation Method 3
a movement effect is created by the interaction of the relief grid and the point and/or line grid when the safety arrangement is tilted
Data Source
Figure 1~2
Figure 3(a)~3(b)
Figure 4~5
AI summary
The invention relates to an optically variable security arrangement (20) for protecting value articles, comprising - a first portion with a two-dimensional relief matrix (30) consisting of a plurality of matrix elements (34), the matrix having a first matrix width p of less than 500 μm in at least one spatial direction R1 and in which matrix each of the matrix elements (34) is formed of at least two reflective relief elements (36) oriented in different directions and - a second portion with at least one point- and/or line matrix (50) which has a second matrix width q in a spatial direction R2, - the first and the second portion being arranged, in a verification position, vertically one above the other such that the aforementioned spatial direction R1 of the first portion runs parallel to the spatial direction R2 of the second portion and the vertical distance between the relief matrix (30) and the point- and/or line matrix (50) is less than half the matrix width p, and - the second matrix width q differs only slightly from the first matrix width p and/ or the first matrix width p and/ or the second matrix width q are location-dependently modulated such that in said verification position an effect of motion is produced by the interaction of the relief matrix (30) and the point- and/ or line matrix (50), as the security arrangement (20) is tilted.