Micro-Optic Device Single-Side Integration
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Solution Overview
Problem
Conventional micro-optic security features on banknotes and security documents are limited by occupying space on both sides of the substrate, allowing optical effects to be viewed from only one side, restricting design flexibility and increasing production costs due to the need for significant capital equipment investment and high spoilage.
Innovation Solution
A micro-optic device with optical and image elements integrally formed on a single surface of a substrate, enabling optical effects to be observed from both sides and allowing for interlaced imagery designs, dynamic optical effects, and improved integration into security documents, using a unitary structure with optical elements and image elements arranged to produce distinct effects in reflection and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If micro lenses and image elements are applied to opposite sides of the polymer substrate, then larger lenses can be used enabling more complex images and effects, but the feature occupies area on both sides of the bank note and imagery can be projected from only one side
Solution Approach 1:
The patent combines the micro lens array and image elements into a single integrated structure located on one side of the substrate. The micro lenses are formed directly over the image elements in the same layer, eliminating the need to occupy space on both sides of the substrate while maintaining the optical functionality.
Solution Approach 2:
The patent utilizes the thickness dimension of the substrate to accommodate the optical path. By positioning both the micro lenses and image elements on the same side and using the substrate thickness as the optical path length, the design achieves complex optical effects without requiring area on both sides of the substrate.
2Strength
If micro lenses and image elements are applied to opposite sides of the polymer substrate, then larger lenses can be used enabling more complex images and effects, but imagery is viewable from only one side of the bank note
Solution Approach 1:
The patent merges the micro lens array and image elements into a single integrated structure on one side of the substrate. This integration allows the optical effects to be generated in a way that can be observed from both sides of the substrate, providing viewing flexibility while maintaining complex optical effects.
Solution Approach 2:
The integrated micro-optic structure serves multiple functions: it generates complex optical effects and allows viewing from both sides of the substrate. This multi-functionality resolves the contradiction between optical effect complexity and viewing direction flexibility.
3Reliability
If image elements are located on the lens side of the substrate, then optical effects can be generated, but the area cannot be overprinted with typical bank note design artwork due to show-through
Solution Approach 1:
By integrating the image elements and micro lenses into a single structure on one side, the patent creates a self-contained optical feature that does not require overprinting. The image elements are formed as part of the micro-optic structure itself, eliminating the show-through problem that would compromise both optical effects and artwork.
4Reliability
If conventional micro-optical security features are used with micro lenses and image elements on opposite sides, then optical effects can be produced, but significant capital equipment investment and expensive tooling are required with high spoilage
Solution Approach 1:
The patent integrates micro lens formation and image element formation into a single manufacturing step using a single tool. This is achieved by providing a tool with a first forming surface having micro lens forming structures and a second forming surface having image element forming structures, allowing both features to be created simultaneously in one operation, thereby reducing capital equipment investment, tooling costs, and spoilage.
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 allows for enhanced space utilization, improved design flexibility, reduced production costs, and the generation of complex, dynamic optical effects that are difficult to counterfeit, while maintaining visibility from both sides of the document.
Implementation Method 1
optical elements, and image elements, wherein the image elements are arranged to be sampled by the optical elements to produce a first optical effect observable from a first surface of the substrate, and a second optical effect observable from a second surface of the substrate
Implementation Method 2
focusing elements, such as micro lenses or micro mirrors, which act to sample and magnify image elements and project imagery
Data Source
AI summary
The present invention relates to a micro-optic device for use in a micro-optic image presentation system. Specifically, the micro-optic device is formed as a single layer unitary structure arranged to generate various complex imagery effects.