Hologram Reading Device Using Ultraviolet Light for Sub-225nm Patterns
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Solution Overview
Problem
Existing technologies face challenges in extracting information from holograms, particularly those developed with high viewing angles using meta-surface technology, as the information is difficult to retrieve through physical analysis.
Innovation Solution
A hologram reading device and method that utilize a hologram element with a specific pattern, a detector to capture reflection beams, and a controller to read information using detection signals. The device includes first and second laser devices with different wavelengths to selectively acquire necessary information from the hologram image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hologram pattern width is reduced to achieve high viewing angle, then viewing angle is improved, but information extraction difficulty increases
Solution Approach 1:
The patent changes the wavelength parameter of the illuminating light to enable information extraction. By using ultraviolet light with wavelength shorter than the hologram pattern width (λ < W), the system can resolve and extract information from hologram patterns that are narrower than visible light wavelengths, thereby solving the information extraction difficulty while maintaining the high viewing angle capability achieved through small pattern widths
Solution Approach 2:
The patent replaces physical/chemical analysis methods (SEM, TEM) with optical detection using ultraviolet light. Instead of using complex physical analysis instruments that require vacuum environments and specialized sample preparation, the system uses UV illumination and optical detection to extract information, simplifying the detection process while maintaining effectiveness
2Adaptability or versatility
If hologram pattern width is reduced below visible light wavelength, then high viewing angle is achieved, but information becomes inaccessible with conventional methods
Solution Approach 1:
The patent changes the fundamental parameter of light wavelength from visible range to ultraviolet range. By using UV light with wavelength shorter than the hologram pattern width, the system overcomes the diffraction limit that prevents information extraction from sub-wavelength structures using visible light, thereby recovering accessible information without compromising the high viewing angle design
Solution Approach 2:
Instead of trying to extract information from holograms with visible light (which fails for sub-wavelength patterns), the patent inverts the approach by using ultraviolet light to illuminate the hologram. This reversal of the wavelength relationship (using shorter wavelength light than the pattern width) enables successful information extraction while maintaining the original hologram structure and viewing angle characteristics
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 enables the selective acquisition of necessary information from hologram images, even those with high viewing angles, by using laser beams of specific wavelengths, thereby overcoming the challenges of information extraction in existing technologies.
Implementation Method 1
a detector configured to detect a reflection beam generated in the hologram pattern
Implementation Method 2
a first laser device configured to irradiate the hologram pattern with a first laser beam
Data Source
AI summary
Disclosed are a hologram reading device and a hologram reading method, the hologram reading device including a hologram element having a hologram pattern, a detector configured to detect a reflection beam generated in the hologram pattern, and a controller connected to the detector and configured to read information the hologram pattern using a detection signal of the reflection beam, wherein the hologram pattern may have the width or diameter smaller than 225 nm.