Dyed Laser Protection Articles for Blue Light Filtering
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Solution Overview
Problem
Existing protective articles struggle to filter harmful visible light wavelengths from 430 nm to 470 nm without significantly reducing visible light transmission, making it difficult for users to see effectively.
Innovation Solution
The use of specific dyes, such as those described by Formula I, which are incorporated into polymer materials to form dyed articles, effectively filter harmful light while maintaining high visible light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If broad wavelength protective article is used to filter harmful visible light wavelengths (430-470 nm), then protection against laser hazards is improved, but visible light transmission is reduced making it difficult for the wearer to see effectively
Solution Approach 1:
The patent applies local quality by designing a protective article with spatially varying optical properties - the dye concentration or filter density is higher in regions requiring laser protection and lower in regions requiring good visibility. This allows different parts of the article to have different wavelength filtering characteristics, enabling selective protection while maintaining overall visibility.
Solution Approach 2:
The patent utilizes parameter changes by varying the concentration, distribution, or molecular structure of the protective dye to optimize the balance between harmful light filtering and visible light transmission. By adjusting dye parameters such as concentration gradient, molecular orientation, or chemical composition, the article achieves wavelength-selective filtering that protects against lasers while preserving visibility.
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
These dyes provide effective protection against harmful light wavelengths while ensuring minimal impact on visible light transmission, allowing users to see clearly.
Implementation Method 1
dyed articles comprising dyes for protection from visible wavelength light hazards... filtering hazardous light wavelengths while preserving visible light transmission
Data Source
AI summary
Harmful light sources in the range from about 430 nm to about 470 nm are finding an increased use for marking, engraving, and cutting various materials. One such source of harmful light are lasers. Protection from laser hazards, including blue and violet wavelength laser sources, is an increasing need as applications for and use of both continuous wave and pulsed lasers continues to grow. Articles for laser protection and other harmful light sources can take many forms, such a shield, a lens, a window, a lid, a cover, a case, a plaque, a sheet, a film, clothing, a panel, a curtain, and articles in varying shapes that offer protection. Laser protection and protection from other harmful light sources (natural and artificial) can be achieved with protective articles that comprise at least one dye according to Formula I.