Dual-Axis Interlaced Lens Array for Secure 3D Anti-Counterfeiting
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Solution Overview
Problem
Current anti-counterfeiting devices using moiré patterns with lens arrays are easily reverse-engineered and limited in their ability to display 3D imagery, as they can be replicated using high-resolution printing techniques and lack the 'wow factor' of true 3D displays.
Innovation Solution
A visual display assembly featuring a lens array with dual-axis interlacing, where lenses are aligned in parallel rows and columns, and images are printed from multiple points of view to create a 3D effect with full volume and multi-directional motion, using pixel mapping to enhance security and authenticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If moiré patterns are used with lens arrays for anti-counterfeiting, then the device can display images with depth of field and motion effects, but the device is easily reverse-engineered and replicated using high-resolution printing techniques
Solution Approach 1:
The patent transitions from 2D printed images to 3D displayed images by using an array of lenses with varying focal lengths. Each lens focuses light from different depths to create a three-dimensional image that cannot be replicated by flat printing techniques, thereby enhancing security against counterfeiting.
Solution Approach 2:
The patent changes the optical parameters of the lens array, specifically using lenses with different focal lengths arranged in a specific pattern. This creates dynamic visual effects including depth of field and motion that vary with viewing angle, making the anti-counterfeiting device difficult to replicate with static printing methods.
2Manufacturing precision
If high-resolution printing is used to replicate moiré patterns, then the images can be reproduced, but the true 3D effect with full volume and multi-directional motion is lost
Solution Approach 1:
The patent uses an array of lenses with varying focal lengths to create true 3D images with full volume and multi-directional motion. This dimensional transformation from 2D printing to 3D display preserves manufacturing precision while adding adaptability for authentic 3D visualization that cannot be achieved through printing alone.
3Ease of manufacture
If lenses are arranged in offset columns to create moiré patterns, then the assembly can be manufactured, but the image display is limited and lacks true 3D depth
Solution Approach 1:
The patent applies local quality by assigning different focal lengths to different lenses within the array. Each lens is optimized for its specific position and function, creating varying local optical properties that collectively produce true 3D images with depth and motion effects, rather than using uniform lenses throughout.
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 provides a secure and difficult-to-replicate anti-counterfeiting device that displays 3D imagery with true depth and motion effects, making it nearly impossible to duplicate and enhancing the 'wow factor' by creating a fuller 3D experience.
Implementation Method 1
an array of lenses with varying focal lengths, where each lens focuses light from different depths
Implementation Method 2
A moiré pattern is provided in the printed images in the form of a secondary and visually evident superimposed pattern
Data Source
AI summary
A visual display assembly adapted for use as an anti-counterfeiting device on paper currency, product labels, and other objects. The assembly includes a film of transparent material including a first surface including an array of lenses and a second surface opposite the first surface. The assembly also includes a printed image proximate to the second surface. The printed image includes pixels of frames of one or more images interlaced relative to two orthogonal axes. The lenses of the array are nested in a plurality of parallel rows, and adjacent ones of the lenses in columns of the array are aligned to be in a single one of the rows with no offset of lenses in adjacent columns/rows. The lenses may be round-based lenses or are square-based lenses, and the lenses may be provided at 200 lenses per inch (LPI) or a higher LPI in both directions.