Optical Element with Segmented Metal Pieces for Unique Appearance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical elements with metal layers for counterfeiting prevention lack variability in appearance, making them less effective aesthetically and in decoration, and require expensive equipment for production.
Innovation Solution
An optical element featuring a conversion layer with an uneven surface and a metal piece layer formed by transferring metal pieces onto the surface, providing a distinct appearance and improved adhesion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a metal film is formed by sputtering to array metal atoms substantially uniformly, then the metal layer has uniform coverage, but the appearance is monotonous and lacks aesthetic variability
Solution Approach 1:
The metal layer is segmented into discrete metal pieces or particles rather than forming a continuous uniform film. This segmentation allows for varied arrangements, sizes, and distributions of metal elements, creating diverse appearances while maintaining controlled coverage through the substrate's geometric constraints.
Solution Approach 2:
The invention applies local quality by allowing different regions of the substrate to have different metal piece densities, sizes, or arrangements. The geometric constraint patterns create zones with varying metal concentrations and configurations, producing spatially diverse appearances from a single layer structure.
2Reliability
If expensive equipment like electron beam writers are used to create fine structures, then counterfeiting prevention effectiveness increases, but production cost increases
Solution Approach 1:
The invention uses geometric constraint patterns that guide metal piece arrangement through physical geometry rather than expensive writing equipment. The substrate's geometric features act as templates that automatically position metal elements, copying the desired pattern through passive geometric guidance instead of active expensive writing processes.
Solution Approach 2:
The invention replaces expensive, complex writing equipment with simple, inexpensive geometric constraint patterns and standard metal pieces. The geometric constraints are implemented through low-cost substrate features that guide metal placement without requiring sophisticated manufacturing equipment.
3Area of stationary object
If a continuous metal film is used, then coverage is complete, but adhesion resistance deteriorates
Solution Approach 1:
The continuous metal film is segmented into discrete metal pieces distributed across the substrate. This segmentation creates natural separation points that prevent crack propagation and improve adhesion resistance, while the overall distribution maintains complete coverage. The discrete pieces can independently adhere to the substrate without stress concentration.
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 optical element expresses a unique appearance different from uniformly arrayed metal films, enhancing counterfeiting prevention and aesthetic appeal while reducing production costs through a simpler manufacturing process.
Implementation Method 1
a conversion layer provided with a light-incidence surface including an uneven surface, and configured to receive light that is incident on the uneven surface and output the light from the uneven surface as light in a different state than the incident light
Implementation Method 2
a metal piece layer configured by a plurality of metal pieces to cover at least part of the uneven surface
Data Source
AI summary
An optical element includes a conversion layer and a metal piece layer. The conversion layer is provided with a light-incidence surface including an uneven surface, the conversion layer being configured to receive light incident on the uneven surface and output the light from the uneven surface as light in a different state than the incident light. The metal piece layer is configured by a plurality of metal pieces to cover at least part of the uneven surface.