Moving and Beating Moiré Shapes for Security Authentication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing authentication methods for security documents and valuable articles lack a combination of moving and beating moiré effects, which could enhance security and aesthetics, and current technologies do not effectively integrate 1D and 2D moiré with level-line moiré techniques to provide a high level of protection against counterfeits.
Innovation Solution
A method that combines 1D or 2D moiré techniques with level-line moiré by creating a modified base layer with intensity gradients and a revealing layer of sampling elements, resulting in a moiré shape that moves and exhibits a beating effect when tilted, ensuring high protection against counterfeits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 1D or 2D moiré techniques are used alone, then moving moiré shapes are produced, but the authentication security is insufficient
Solution Approach 1:
The patent combines 1D or 2D moiré techniques with level-line moiré to create a composite moiré structure that exhibits both moving and beating effects. This merging of multiple moiré types increases authentication security while maintaining manageable structural complexity through systematic integration of base layers and revealing layers with specific geometric relationships.
Solution Approach 2:
The patent divides the moiré structure into distinct components: a base layer containing base elements and a revealing layer containing sampling elements. This segmentation allows independent design and optimization of each layer's parameters (period, orientation, element shape) to achieve the desired moving and beating effects while simplifying the overall fabrication process.
2Adaptability or versatility
If level-line moiré is used alone, then beating effect is produced, but moving capability is lost
Solution Approach 1:
The patent merges level-line moiré with 1D or 2D moiré techniques to create a hybrid structure that simultaneously produces beating effects (from level-line components) and moving effects (from 1D/2D components). This combination enhances versatility while maintaining ease of authentication through distinct visual characteristics that can be independently verified.
Solution Approach 2:
The patent creates a dynamic moiré structure where the base layer and revealing layer are designed with specific geometric relationships that produce both static beating patterns and dynamic moving effects. The sampling elements in the revealing layer are positioned to sample the base layer in a way that generates motion when viewed from different angles, while intensity variations create beating effects at specific locations.
3Reliability
If fine geometric structures are synthesized at specific angular relationships, then authentication security is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the geometric structure into discrete base elements and sampling elements with defined periods and orientations. This segmentation allows manufacturing tolerances to be applied to each element type independently, reducing the overall precision requirements compared to creating a single complex continuous structure. The periodic nature of the elements provides robustness against small variations.
Solution Approach 2:
The patent utilizes parameter relationships between the base layer and revealing layer (such as period ratios and angular orientations) to generate the fine geometric structures. By controlling these parameters rather than directly fabricating the fine structures, the patent achieves high authentication security while allowing standard manufacturing tolerances. The moiré effects emerge from the parameter relationships rather than requiring precise direct fabrication of the resulting patterns.
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 method produces a moiré shape that simultaneously moves and shows a beating effect, providing enhanced security and authenticity verification, with the moiré shape remaining recognizable despite changes in intensity levels, thus offering superior protection against counterfeits.
Implementation Method 1
The present invention is related to the following US patents: (a) U.S. Pat. No. 7,194,105, filed Oct. 16, 2002, entitled 'Authentication of documents and articles by moiré patterns'
Implementation Method 2
These patents describe the following families of moirés: 1D moirés, 2D moirés and level-line moirés
Data Source
AI summary
The present invention proposes a method for producing an authenticable moiré shape that simultaneously moves and shows a beating effect. The method relies on a combination of the 1D or the 2D moiré and the level line moiré. When tilting a compound showing such a moiré, the moiré shape moves, its intensity levels change significantly but its shape remains the same and is recognizable. Embodiments comprise a base layer made of patterned metallic tiny shapes and a revealing layer made of a 1D array of cylindrical lenslets or of a 2D array of spherical or aspherical lenslets.