3D Holographic Display With Embedded Codes and Phase Control
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Solution Overview
Problem
Existing three-dimensional holograms suffer from issues such as iridescence in the vertical direction, limited parallax, high production costs, and inefficiencies in incorporating machine-readable codes, making them unsuitable for mass production and prone to counterfeiting.
Innovation Solution
An integrated three-dimensional display system that calculates and records phase angles to control light phases, incorporates machine-readable codes, and combines two-dimensional information with three-dimensional images, using a metallic reflective layer and controlled demetallization to enhance anti-counterfeiting properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If Lippmann hologram technique is used to display full-color three-dimensional image, then color reproduction is improved, but production cost and cycle time increase
Solution Approach 1:
The patent segments the holographic recording into multiple wavelength components (red, green, blue) recorded separately on the same photosensitive material. By using a tunable laser that can emit at different wavelengths sequentially, the system records each color component in separate exposure steps, then combines them to form a full-color three-dimensional image. This segmentation approach enables color reproduction while maintaining faster production compared to traditional Lippmann holography requiring complex multi-color laser systems.
Solution Approach 2:
The patent changes the wavelength parameter of the laser light source to record different color components. By tuning the laser wavelength to match the sensitivity peaks of the photosensitive material layers, the system efficiently records red, green, and blue components. This parameter-based approach allows flexible color control and reduces production time compared to fixed-wavelength multi-laser systems.
2Loss of information
If machine-readable codes are added to photosensitive material, then identification capability is improved, but production convenience deteriorates
Solution Approach 1:
The patent merges the holographic image recording and machine-readable code recording into a single integrated process on the same photosensitive material. The tunable laser system records both the three-dimensional holographic information and the identification codes sequentially without requiring separate production steps. This combining approach maintains production efficiency while adding identification functionality, eliminating the need for individual code production and attachment.
Solution Approach 2:
The photosensitive material and laser system are designed to perform multiple functions: recording three-dimensional holographic images, embedding machine-readable codes, and providing anti-counterfeiting features. The same recording apparatus and material platform handle both imaging and identification tasks, simplifying the manufacturing process and reducing the number of production steps required.
3Manufacturing precision
If phase angle recording area is expanded to improve image quality, then computation time and light loss increase
Solution Approach 1:
The patent applies local quality optimization by concentrating the phase angle recording in specific calculated element regions where the holographic information is most critical. Rather than uniformly recording across the entire photosensitive material, the system calculates and records phase angles only in regions that contribute most significantly to image quality. This localized approach reduces computation time and light loss while maintaining high hologram clarity in the important areas.
4Ease of manufacture
If conventional hologram techniques are used, then production simplicity is maintained, but anti-counterfeiting capability deteriorates
Solution Approach 1:
The patent uses composite photosensitive material structures with multiple layers or regions having different sensitivities and properties. By combining materials with different characteristics in a single holographic medium, the system achieves both ease of manufacture (using a single material platform) and enhanced anti-counterfeiting capability (through complex multi-layer interference patterns and embedded identification codes that are difficult to replicate).
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 system provides clear, full-color three-dimensional images with reduced computation time, improved brightness control, and enhanced anti-counterfeiting capabilities, suitable for mass production and secure identification.
Implementation Method 1
a recording surface including a calculated element region, in which phase components of spatial information calculated by a computer are recorded to apply to a hologram
Implementation Method 2
the phase angle can be calculated and recorded. Such a phase hologram can modulate only the phase components of light while achieving high diffraction efficiency
Implementation Method 3
Such a phase hologram can modulate only the phase components of light while achieving high diffraction efficiency
Implementation Method 4
computer-generated holograms controlled by interference of light calculated by a computer
Data Source
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AI summary
An integrated three-dimensional display (10) includes a recording surface (14) which includes a calculated element region (16) in which phase components of light from light converging points (Sn) of a holographic reconstructed image (40) are calculated, and a phase angle recorded area (18) for recording a phase angle calculated based on the phase components. The phase angle recorded area (18) includes a plurality of monochromatic regions (22) having a uneven structure surface. The phase angle is recorded in an overlap area (19) in which the calculated element region (16) and the phase angle recorded area (18) overlap each other. Light converges on the light converging points (Sn) at specific distances (Zn) from the recording surface (14), the specific distances being determined for the respective light converging points (Sn) even when light reflected from the plurality of monochromatic regions (22) converges.