Contoured Surface Image Laser Ablation for ID Document Security
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Solution Overview
Problem
Current identification documents lack advanced security features to prevent sophisticated counterfeiting, necessitating additional measures for secure credentialing.
Innovation Solution
The implementation of a multilayer laminate identification document with a contoured surface image formed via laser ablation, which changes appearance when viewed from different angles and is perceptible by touch, providing enhanced security through personalized and difficult-to-reproduce features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional printing methods are used for ID documents, then manufacturing is simple and cost-effective, but security against counterfeiting is insufficient
Solution Approach 1:
The patent replaces traditional mechanical printing methods with laser ablation technology. The laser system selectively removes material from the laminate surface to create contoured images, transitioning from chemical/mechanical printing to optical/thermal processing. This substitution provides anti-counterfeiting security while maintaining manufacturing feasibility through automated laser systems.
Solution Approach 2:
The patent uses a multilayer laminate structure comprising a base layer and an outer layer with different ablation characteristics. The composite material design allows the laser to create contrasting contoured images by differential material removal. The laminate structure provides both security through the contoured surface and manufacturing ease through standardized material stacks.
2Reliability
If flat printed images are used, then the document is simple to produce, but it lacks tactile verification and angular visibility features
Solution Approach 1:
The patent applies curvature to the normally flat ID document surface by creating contoured images through laser ablation. The removed material creates three-dimensional relief features that are tactilely perceptible and optically variable from different angles. This curvature transformation adds authentication capabilities without requiring complex mechanical structures.
Solution Approach 2:
The patent creates optical color/brightness changes through surface topography rather than pigmentation. The contoured surfaces reflect light differently from flat areas, creating visual contrast that varies with viewing angle. This optical effect provides authentication features similar to color changes but achieved through geometric modification rather than chemical dyes.
3Reliability
If sophisticated security features are added to ID documents, then counterfeiting difficulty increases, but manufacturing cost and process complexity increase
Solution Approach 1:
The patent makes the laser ablation process serve multiple functions simultaneously: it creates the identification image, provides tactile verification through contouring, generates optical variable effects for angle-dependent visibility, and produces inherent security against copying. This multi-functionality reduces the need for separate security features, thereby limiting overall manufacturing complexity despite the sophisticated output.
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 contoured surface image enhances security by being difficult to reproduce without sophisticated equipment, offering an additional layer of protection against counterfeiting and increasing the difficulty of forgery, while being perceptible by touch and visible at specific angles, thus providing a unique and secure authentication method.
Implementation Method 1
a contoured surface image formed via laser ablation
Implementation Method 2
has a first appearance when viewed in reflected light at a first angle and a second, different appearance when viewed in reflected light at a second, different angle
Data Source
AI summary
A multilayer laminate identification document including an outer layer having a contoured surface image formed therein via laser ablation. The contoured surface image has contours based on a digital monochrome image, and has a first appearance when viewed in reflected light at a first angle and a second, different appearance when viewed in reflected light at a second, different angle. The multilayer laminate identification document is formed by generating a second digital monochrome image with continuous pixel patterns from a first digital monochrome image, and irradiating the surface of the identification document with a laser using the second digital monochrome image as a guide to form a contoured surface image in the surface of the identification document.