Parallax Security Element with Nested Coded Images
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Solution Overview
Problem
Current security elements fail to provide effective authentication and identification of articles or objects due to limitations in producing optical effects that are easily integratable and resistant to photocopying and scanning.
Innovation Solution
A security element with a combined image comprising at least two nested coded images, utilizing a revelation frame that creates a parallax effect, with high resolution and fine detail to prevent reproduction by photocopying and scanning, and allowing observation from both sides of the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a security element uses a transparent substrate with nested coded images and a development grid to create optical effects, then the authentication capability is improved, but the element becomes vulnerable to photocopying and scanning
Solution Approach 1:
The patent replaces traditional mechanical printing methods with an optical system comprising a transparent substrate with nested coded images and a development grid. This optical system creates dynamic visual effects that cannot be reproduced by standard photocopying or scanning mechanisms, thereby substituting mechanical reproduction with optical phenomenon-based security.
Solution Approach 2:
The patent utilizes changes in viewing parameters (observation angle, lighting conditions) to reveal different coded images through the development grid. The security feature transitions from a static appearance to a dynamic one where images are revealed only under specific parameter conditions, making photocopies and scans ineffective as they cannot replicate these parameter-dependent visual changes.
2Object-affected harmful factors
If the resolution of the combined image and development screen is increased to prevent photocopying, then security against reproduction is improved, but the complexity of manufacturing increases
Solution Approach 1:
The patent adds a temporal and angular dimension to the security feature by creating images that are revealed through changes in viewing angle rather than through increased spatial resolution alone. The development grid with its specific period and the nested coded images work together to create a system where security is achieved through geometric relationships and optical paths rather than merely through high-resolution printing, thus avoiding the manufacturing complexity associated with ultra-high resolution while maintaining anti-photocopying protection.
3Adaptability or versatility
If the security element allows observation from both sides of the substrate, then authentication versatility is improved, but the risk of counterfeiting increases
Solution Approach 1:
The patent employs asymmetric positioning of the nested coded images and the development grid on the transparent substrate. The coded images are arranged at specific positions and orientations such that they are revealed in different sequences and patterns when viewed from opposite sides. This asymmetric configuration creates unique authentication signatures for each viewing direction, allowing versatility in observation while maintaining counterfeiting resistance through directional-specific visual patterns that are difficult to replicate.
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
Enhances authentication and identification by providing a secure, anti-photocopying mechanism and visible animation effects, while maintaining a homogeneous appearance to the naked eye, thus increasing the security of documents like banknotes and passports.
Implementation Method 1
a non-opaque substrate, in particular a transparent substrate, having a first face bearing a plurality of interlocking coded images and a second face, opposite to the first, bearing a revealing grid
Implementation Method 2
The coded images can be revealed through the parallax effect
Data Source
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Figure 5~6H
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AI summary
The present invention relates to a security article, in particular a security document, comprising a security element (1) that comprises an optical system, comprising: a transparent or translucent substrate (2); on the side of a first surface (2a, 2b) of the substrate (2), a combined image comprising a plurality of encoded interleaved images (I1); on the side of a second surface (2a, 2b) of the substrate (2), opposite the first, an exposing screen (4) placed on top of the combined image, which enables the encoded images (I1) to be observed during a change in the direction of observing the security element (1) relative to the optical system, wherein the encoded images (I1) are observable from the side of the first surface and from the side of the second surface of the substrate (2).