Bird Protection Glass With UV Reflectance Patterning
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Solution Overview
Problem
Existing bird protection glazings are either ineffective in reducing bird strikes or visibly annoying to humans, and existing solutions do not adequately leverage the visual perception differences between birds and humans to minimize collisions.
Innovation Solution
An optically structured element with high- and low-reflectivity regions designed to exploit the sensitivity of birds' double cone sensory cells, featuring a double cone reflectance difference greater than 5% and VIS transmittance greater than 70%, minimizing visibility to humans while effectively reducing bird strikes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bird protection glazings with high-reflectivity regions are used to reflect UV radiation, then bird strike reduction is improved, but human visual comfort deteriorates due to visible reflections
Solution Approach 1:
The glazing is divided into multiple local regions with different optical properties: high-reflectivity regions (reflecting 40-90% of UV radiation) and low-reflectivity regions (reflecting 10-40% of UV radiation). This spatial differentiation allows the glazing to provide bird protection where needed while maintaining visual comfort in other areas, resolving the contradiction between bird strike reduction and human visual comfort.
2Reliability
If satined glass is used to reduce bird strike, then bird collision prevention is improved, but human viewing comfort deteriorates due to reduced transparency
Solution Approach 1:
Instead of uniformly treating the entire glazing surface, the invention applies different reflectivity characteristics to different local regions. The low-reflectivity regions maintain high transparency for human viewing comfort, while high-reflectivity regions provide bird protection, thus resolving the contradiction between bird strike prevention and human viewing comfort.
3Ease of manufacture
If films with bird of prey silhouettes are pasted on glazings, then bird strike reduction is attempted, but effectiveness deteriorates due to poor bird response
Solution Approach 1:
The invention changes the optical parameters of the glazing by applying coatings with specific reflectivity characteristics in different wavelength ranges (UV, visible, infrared). By controlling the reflectivity in the UV range specifically, the glazing becomes visible to birds without requiring complex silhouette patterns, thus improving effectiveness while maintaining manufacturing simplicity.
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 optically structured element significantly reduces bird strikes by utilizing the birds' double cone sensory cells' perception, maintaining high human visibility and being cost-effective to produce, while also offering additional functionalities like thermal insulation.
Implementation Method 1
Bird protection glazings having a high-reflectivity region and a low-reflectivity region reflect electromagnetic radiation in a UV-centered wavelength range, at approximately 370 nm
Data Source
AI summary
An optically structured element (1) for minimizing or preventing bird collisions, includes a carrier element (2), a high-reflectivity region (3), and a low-reflectivity region (4); which is distinguished in that a double cone reflectance difference of a first double cone reflectance of the high-reflectivity region (3) and a second double cone reflectance of the low-reflectivity region (4) is greater than or equal to 5% and a VIS transmission ratio of the first VIS transmittance and the second VIS transmittance is greater than or equal to 70% and less than or equal to 200%.