Hologram Master Kinetic Diffraction Individualization
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Solution Overview
Problem
Existing methods for producing individualized holograms with kinetic diffraction structures face challenges in integrating kinetic structures into the individualization area without hindering personalization or requiring additional manufacturing steps, and in minimizing disruptive effects during production.
Innovation Solution
A hologram master with a contiguous individualization region featuring a mirrored blaze grating for kinetic diffraction structures, where the kinetic structures are integrated into the same plane as the blaze grating, allowing simultaneous exposure and production of individualized information and kinetic diffraction structures, with an anti-Newton coating to reduce Newton rings and expand the angular range of light detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If kinetic diffraction structures are integrated into the individualization area of the hologram master, then the hologram can display kinetic effects and individualized information in the same area, but the mirrored surface of existing kinetic structures prevents proper exposure and individualization
Solution Approach 1:
The patent applies local quality by differentiating the surface properties within the individualization area: a first region has a mirrored blaze grating for kinetic structures, while a second region has a non-mirrored diffuse reflection surface for individualized information. This local differentiation allows each region to fulfill its specific function without interfering with the other, solving the exposure problem while maintaining kinetic effects.
Solution Approach 2:
The individualization area is segmented into distinct regions with different optical properties. The first region (blaze grating) and second region (diffuse reflection) are spatially separated within the same individualization area, allowing independent optimization of each region's function during exposure and reconstruction.
2Ease of manufacture
If a mirrored surface is used for kinetic diffraction structures, then the kinetic effect is achieved, but Newton rings appear and the angular range of light detection is limited
Solution Approach 1:
The harmful mirrored surface property is extracted and removed from the second region where individualized information is stored. By eliminating the mirrored surface in favor of a diffuse reflection surface, Newton rings are prevented from forming in the individualization area while kinetic structures in the first region retain their mirrored blaze grating for kinetic effects.
3Manufacturing precision
If separate manufacturing steps are used for kinetic structures and individualized holograms, then each feature can be optimized, but the manufacturing complexity and production time increase
Solution Approach 1:
The patent merges the production of kinetic structures and individualized holograms into a single simultaneous exposure process. Both features are created in one manufacturing step using different regions of the same individualization area, eliminating the need for separate manufacturing steps while maintaining optimization of each feature through their distinct optical properties.
Solution Approach 2:
The individualization area serves multiple functions simultaneously: it produces kinetic diffraction structures in the first region and individualized information in the second region during a single exposure process. This multi-functionality reduces manufacturing complexity while maintaining feature optimization.
4Ease of manufacture
If the hologram master uses a mirrored blaze grating for kinetic structures, then kinetic diffraction is achieved, but the diffraction efficiency varies and the angular range is restricted
Solution Approach 1:
Different optical qualities are assigned to different regions: the blaze grating in the first region provides high diffraction efficiency for kinetic structures at specific angles, while the diffuse reflection surface in the second region provides omnidirectional light scattering for individualized information, ensuring reliable performance for each function.
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
This approach simplifies the production of individualized holograms by enabling both individualized information and kinetic diffraction structures to be formed in the same area, enhancing the clarity and security of the hologram while minimizing manufacturing complexity.
Implementation Method 1
a first diffraction region (30) having a mirrored blaze grating (31) with kinetic diffraction structures (32) integrated into or thereon
Implementation Method 2
the diffraction of holograms is based on stored interference information from interfering coherent light fields
Implementation Method 3
exposing a photosensitive material to the interfering light fields
Implementation Method 4
with an anti-Newton coating to reduce Newton rings and expand the angular range of light detection
Implementation Method 5
a blaze grating with kinetic diffraction structures integrated into or thereon
Implementation Method 6
The blaze grating is optimized for diffraction of light at a wavelength that corresponds to a reconstruction wavelength of the holographic diffraction structures
Data Source
Figure 1a
Figure 2a
Figure 3~4
AI summary
The invention relates to a hologram master (10) for producing customised holograms (400) with kinetic diffraction patterns (32) comprising: a continuous customisation region (20), which comprises at least one first diffraction region (30) having a mirrored blaze grating (31) with kinetic diffraction patterns (32) integrated therein or thereon. The invention further relates to a method for producing security holograms (400) using a hologram master (10) of this kind and to security holograms (400). The advantage consists in the fact that the presence of kinetic diffraction patterns (32) in the at least one diffraction region (30) is not detrimental to customisation.