Polymeric Security Sheet With Integrated Optical Image Projection
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Solution Overview
Problem
Existing polymeric security documents, such as banknotes, lack innovative methods to integrate optical security devices that provide unique and effective anti-counterfeiting features.
Innovation Solution
A polymeric sheet material is developed with integrated and/or applied optical security devices, featuring arrangements of focusing elements and image icons, which can project synthetic images, and optionally uses an opacifying coating to enhance security and authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical security devices are integrated into polymeric substrates, then security and authentication features are enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent combines the optical security device with the polymeric substrate into a single integrated structure. The substrate serves dual purposes: as the structural base and as the optical medium for projecting synthetic images. This merging reduces the need for separate components and simplifies the overall manufacturing process while maintaining enhanced security features.
Solution Approach 2:
The polymeric substrate is designed to perform multiple functions simultaneously: it provides structural support, enables optical projection of security images, and can be configured with varying thicknesses to control optical properties. This multi-functionality reduces the number of separate components needed, thereby reducing manufacturing complexity while enhancing security.
2Reliability
If the substrate thickness is increased to serve as an optical spacer, then optical projection capability is improved, but material consumption increases
Solution Approach 1:
The patent optimizes the substrate thickness parameter to achieve the desired optical projection capability. By carefully selecting and controlling the thickness within a specific range, the substrate can function as an effective optical spacer without requiring excessive material consumption. This parameter optimization balances performance requirements with material efficiency.
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 material provides enhanced security and authentication features through projected images and optical effects, supporting automated verification and detection systems, while resisting degrading external effects.
Implementation Method 1
an arrangement of image icons and an overlying arrangement of focusing elements
Implementation Method 2
The image icon and focusing element arrangements are configured such that when the arrangement of image icons is viewed through or with the arrangement of focusing elements, one or more synthetic images are projected
Implementation Method 3
a reflective (e.g., metal) surface, which is applied to all or part of an opposing surface of the substrate and which serves to provide a reflection of the image icons beyond the reflective surface so that the focusing elements can focus on the reflection of the image icons
Implementation Method 4
an opacifying coating may be used to cover remaining portions thereof
Data Source
Figure 1~3(a)
Figure 3(b)~3(e)
Figure 4(a)~5
AI summary
An improved polymeric sheet material for use in making polymeric security documents such as banknotes is provided. The inventive polymeric sheet material has one or more integrated and/or applied optical security devices. Polymeric security documents made using these improved polymeric sheet materials are also provided.