Micro-optic Device Integrated Focusing and Image Elements
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Solution Overview
Problem
Conventional micro-optic security devices face challenges in controlling the phase and skew of focusing elements relative to image elements, leading to inconsistent optical effects and distortions in projected images, which affects the authenticity and aesthetic appeal of security documents like banknotes and passports.
Innovation Solution
A micro-optic device with integrated focusing and image elements on a single unitary structure on a substrate, allowing for consistent relative phase and skew, and a single embossing process to minimize manufacturing variations and costs, utilizing refractive, reflective, or diffractive elements with a layer of partially reflective material to enhance optical effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If focusing elements and image elements are formed in separate layers using conventional embossing and printing processes, then manufacturing flexibility is improved, but phase control precision and image consistency deteriorate
Solution Approach 1:
The patent combines the focusing elements layer and image elements layer into a single integrated layer structure. The focusing elements and image elements are formed simultaneously in the same layer during a single embossing process, eliminating the need for separate layers and subsequent printing processes. This integration ensures precise phase control between focusing elements and image elements, as their relative positions are determined by the same embossing mold rather than by alignment between separate layers.
2Adaptability or versatility
If multiple separate processes are used to form focusing elements and image elements, then process adaptability is improved, but manufacturing time and cost increase
Solution Approach 1:
The patent merges multiple manufacturing processes into a single embossing operation. Both the focusing elements and image elements are formed simultaneously in one step using a single embossing mold, rather than requiring separate embossing and printing processes. This significantly reduces manufacturing time and cost while maintaining the ability to produce various optical effects through mold design.
Solution Approach 2:
The single integrated layer structure serves multiple functions simultaneously: it provides both the focusing elements for light manipulation and the image elements for visual information display. The embossing mold itself becomes a multi-functional tool that creates both structural elements in one operation, enhancing manufacturing efficiency while maintaining design flexibility.
3Ease of manufacture
If focusing elements and image elements are formed in separate layers, then ease of manufacturing is improved, but relative phase control and image consistency worsen
Solution Approach 1:
The patent merges the focusing elements and image elements into a single integrated layer, ensuring that their relative positions are precisely controlled by the embossing mold geometry. This integration eliminates phase variations that occur when separate layers are used, as the relative phase relationship is inherently fixed by the single-layer structure rather than by alignment between independent layers.
4Device complexity
If conventional separate-layer structures are used, then manufacturing simplicity is improved, but optical effect consistency and image quality deteriorate
Solution Approach 1:
The patent combines focusing elements and image elements into a single layer structure that is formed by one embossing process. This integrated structure ensures that the optical effects are consistent across all produced items, as the relative phase and positioning are determined by the mold geometry rather than by variable alignment processes. The simplicity of the single-layer structure does not compromise reliability; instead, it enhances it by eliminating phase variation issues.
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 ensures consistent and aesthetically pleasing optical effects across security documents, reducing manufacturing costs and waste by integrating focusing and image elements in a single embossing step, resulting in improved image quality and reduced distortions.
Implementation Method 1
each focusing element focuses light towards, or causes light to be diverged from or constructively interfere at a real or imaginary focal point
Implementation Method 2
each focusing element focuses light towards, or causes light to be diverged from or constructively interfere at a real or imaginary focal point
Implementation Method 3
utilizing refractive, reflective, or diffractive elements with a layer of partially reflective material to enhance optical effects
Data Source
AI summary
A micro-optic device, including: a substrate; a plurality of image elements; and a plurality of focusing elements, each focusing element focuses light towards, or causes light to be diverged from or constructively interfere at a real or imaginary focal point, the focusing elements causing the image elements to be sampled so as to project imagery which is observable to a user from at least a first viewing angle, wherein a first focusing structure including at least a first group of the focusing elements and a first imagery structure including at least a first group of the image elements are integrated into a first unitary structure on a first side of the substrate.