Moiré Magnifier Display for Complex 3D Security Images
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing security features for data carriers, such as banknotes and identification documents, lack versatility in design and are limited in generating complex three-dimensional images with varying content when viewed from different angles, restricting their anti-counterfeiting capabilities.
Innovation Solution
A display arrangement that uses a raster image arrangement with a motif image divided into cells, viewed through a grid of viewing elements, employing a magnification and movement matrix to create a three-dimensional image that appears to float and change with tilting, allowing for complex single-image representations with high resolution and varied magnification effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional embossed holograms or diffraction structures are used for security features, then optical variable effects are achieved, but the design versatility and ability to generate complex three-dimensional images are limited
Solution Approach 1:
The security feature is divided into two separate components: a motif image layer and a viewing grid layer. The motif image is segmented into multiple cells, each containing imaged areas of the three-dimensional body. The viewing grid is segmented into multiple viewing elements arranged in a regular pattern. This segmentation allows independent optimization of each component and enables complex three-dimensional image generation without requiring a single complex structure.
Solution Approach 2:
The invention transitions from conventional two-dimensional security features to three-dimensional image representation. By using a raster image arrangement with height functions z(x,y) that define the vertical position of image points, the system creates genuine three-dimensional visual effects. The viewing grid with its periodic structure adds another dimensional layer to the image formation process, enabling complex spatial relationships to be encoded and displayed.
2Reliability
If simple two-dimensional images are used on data carriers, then reproduction is easier, but security against unauthorized copying is reduced
Solution Approach 1:
The invention changes the fundamental parameters of the security feature from two-dimensional to three-dimensional. The height function z(x,y) introduces a new parameter dimension that cannot be easily replicated by conventional copying methods. The periodic viewing grid structure with specific pitch and phase relationships creates optical effects that require precise dimensional control, making unauthorized reproduction extremely difficult while maintaining manufacturability through standardized production processes.
3Manufacturing precision
If high-resolution three-dimensional images are generated using the viewing grid and motif image arrangement, then security verification is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The three-dimensional image data is pre-processed and encoded into the motif image before the actual manufacturing process. The height function z(x,y) and the viewing grid parameters are calculated and fixed in advance, allowing the complex three-dimensional information to be stored in a two-dimensional motif image that can be manufactured using conventional printing or embossing techniques. This preliminary encoding action simplifies the manufacturing process while maintaining high image resolution.
Solution Approach 2:
The invention replaces complex mechanical three-dimensional structures with an optical system consisting of a motif image and a viewing grid. Instead of creating physical three-dimensional relief structures that would require high-precision manufacturing, the system uses optical principles where the viewing grid modulates light passing through the motif image to generate three-dimensional visual effects. This substitution dramatically reduces manufacturing precision requirements while maintaining high image quality.
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
Enables the creation of complex, high-resolution three-dimensional images that move and change when tilted, enhancing the security and authenticity verification of data carriers by providing a versatile and sophisticated visual effect resistant to simple reproduction.
Implementation Method 1
a viewing grid composed of a plurality of viewing elements for displaying the specified body when viewing the motif image with the aid of the viewing grid
Implementation Method 2
The basic functioning of such moiré magnification arrangements is in the article 'The moiré magnifier'
Data Source
Figure 1~2
Figure 3
Figure 4a~4b
AI summary
The invention relates to a representation system for security papers, value documents, electronic display elements or other data carriers, comprising a raster image system for representing a predetermined three-dimensional body (30) that is defined by a body function f(x,y,z). Said raster image system comprises a motif image which is subdivided into a plurality of cells (24) in which imaged areas of the predetermined body (30) are arranged, a viewing raster (22) from a plurality of viewing elements for representing the predetermined body (30) when the motif image is viewed using the viewing raster (22), the motif image and its subdivision into a plurality of cells (24) having an image function m(x,y) that is defined by formula (I) with (II) and (III).