Multispectral Scanner Frame for Hologram and RFID Authentication
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Solution Overview
Problem
Existing document scanners, such as those described in Russian Utility Model No. 127 977 U1, are unable to read holographic images present in modern identity documents.
Innovation Solution
A scanner equipped with a multispectral authentication system that includes a frame with embedded LEDs, an optical scanner, and a radio frequency identification (RFID) reader, capable of capturing image data using white, infrared, and ultraviolet light, and reading RFID chips, to verify and authenticate identity documents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional optical scanner with single-wavelength illumination is used, then the device complexity is low, but it cannot read holographic images and optically variable elements in modern identity documents
Solution Approach 1:
The patent implements dynamic illumination by varying the intensity of multiple LEDs with different spectral characteristics (UV, blue, green, red) over time. The microprocessor controls each LED to emit at different intensity levels in a sequence, allowing the optical scanner to capture holographic images and optically variable elements that require dynamic spectral illumination to manifest their security features properly
Solution Approach 2:
The system changes the spectral parameters of illumination by using multiple LEDs with different peak wavelengths and controlling their intensities dynamically. This allows the same optical scanner to capture different spectral signatures of security features (holograms, optically variable ink) by adjusting which LEDs are active and at what intensity, enabling comprehensive document authentication without adding separate fixed-wavelength illumination systems
2Reliability
If multiple illuminators with different wavelengths are used, then comprehensive authentication capability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges multiple wavelength illumination capabilities into a single integrated frame structure. Instead of using separate illuminator assemblies for UV, blue, green, and red light, all LEDs are embedded within one frame that sits beneath the glass pane, sharing common structural support, control electronics, and optical path. This consolidation achieves comprehensive spectral illumination while reducing overall device complexity compared to multiple independent illuminator systems
Solution Approach 2:
The frame serving as the structural support for the glass pane is given multiple functions: it provides mechanical support, houses the LED array, and acts as the illumination source assembly. This multi-functional design eliminates the need for separate illumination housing and mounting structures, reducing device complexity while maintaining reliable multi-wavelength authentication capabilities
3Adaptability or versatility
If the intensity of LEDs is dynamically regulated, then the capability to capture optically variable elements is improved, but the energy consumption increases
Solution Approach 1:
The system uses periodic illumination sequences where LEDs are activated in cycles rather than continuously. Each LED emits at high intensity for a brief period to capture the required spectral information, then remains off or operates at low intensity. This periodic action pattern allows the scanner to gather all necessary optical data while minimizing total energy consumption compared to continuous high-intensity illumination of all LEDs
Data Source
AI summary
Conventional scanners are incapable of reading holographic images, optically variable ink, and/or optically variable devices. Accordingly, an embodiment of a scanner is disclosed that utilizes a frame underlying a glass pane on which an identity document, such as a passport and visa document, is placed. The frame comprises a frame body with a plurality of embedded light emitting diodes (LEDs). A microprocessor is configured to regulate an intensity of the LEDs to vary the intensity of the LEDs as a camera of the scanner captures the image data. This enables the imaging of holographic images, optically variable ink, and optically variable devices in the identity document.