Optical Fiber Core Stabilizer for Side Light Luminance
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Solution Overview
Problem
Conventional methods for increasing side light emitting luminance in omni-directional side light emitting type plastic optical fibers often result in a separation of layers at the interface between the core and clad due to deterioration, leading to reduced light scattering and impaired optical characteristics due to the HAZE phenomenon.
Innovation Solution
Incorporating cyclic phosphite as a phosphorus-based stabilizer in the core material, along with a fluorine-based resin for the clad, and using a coextrusion method to manufacture the optical fiber, which prevents transmittance reduction and maintains optical clarity by avoiding the use of silicon dispersants in the clad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light dispersant and metal oxide material are added to the clad to increase side light emitting luminance, then side light emitting luminance is improved, but layer separation occurs at the interface between core and clad due to deterioration
Solution Approach 1:
The patent removes the light dispersant and metal oxide material from the clad and relocates them to the core. This extraction from the problematic location (clad interface) eliminates the layer separation issue while preserving the light scattering function in the core material.
Solution Approach 2:
The patent applies different material compositions to different regions: the core contains light dispersant and metal oxide material for light scattering, while the clad is free of these materials to maintain interface adhesion. This local differentiation resolves the contradiction between light emission and layer stability.
2Illumination intensity
If light dispersant and metal oxide material are added to the clad to increase side light emitting luminance, then side light emitting luminance is improved, but light scattering is reduced in the separated region causing HAZE phenomenon
Solution Approach 1:
By extracting the light dispersant and metal oxide material from the clad and placing them in the core, the patent prevents the formation of separated regions that cause HAZE. The materials remain in the core where they continue to provide light scattering without creating interface defects.
Solution Approach 2:
The patent proactively prevents layer separation by avoiding the addition of problematic materials to the clad in the first place. This preventive approach cushiones against the future occurrence of HAZE phenomenon and optical characteristic degradation.
3Ease of manufacture
If conventional materials are used in the core and clad, then manufacturing is simple, but transmittance reduction occurs due to deterioration over time
Solution Approach 1:
The patent modifies the chemical composition parameters of the core and clad materials. The core contains phosphorus-based stabilizers and the clad contains specific resin compositions that resist deterioration. These parameter changes maintain manufacturing simplicity while significantly improving long-term transmittance stability.
Solution Approach 2:
The patent uses composite material formulations: the core combines resin with phosphorus-based stabilizers and light dispersants, while the clad uses specific resin compositions. These composite materials provide both ease of manufacture through standard processing and improved resistance to transmittance reduction over time.
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 effectively inhibits the transmittance reduction phenomenon caused by deterioration, maintaining optical clarity and preventing the HAZE phenomenon, while enhancing the adhesive force between the core and clad for improved durability and side light emission.
Implementation Method 1
adding cyclic phosphite to the core... may inhibit a transmittance reduction phenomenon due to degradation
Implementation Method 2
a core extending in a length direction and formed of a material containing a phosphorus (P) based stabilizer; and a clad formed to surround the core
Data Source
AI summary
Disclosed is an optical fiber with reducing light bias for lighting including: a core extending in a length direction and formed of a material containing a phosphorus (P) based stabilizer; and a clad formed to surround the core, wherein the phosphorus (P) based stabilizer contains cyclic phosphite.