Light Guiding Element with Polymer Overmold for Precision Geometry
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Solution Overview
Problem
Traditional methods for forming optical fiber components with irregular or tapered geometries are time-consuming, difficult to replicate precisely, and prone to variations in dimensional precision, while polymeric components are unsuitable for applications with intense heat and UV exposure due to durability issues.
Innovation Solution
A light-guiding element with a glass core and a peripherally disposed polymeric optical layer, where the refractive indices of the glass and polymer are matched to facilitate internal reflection, and an optional cladding is used to enhance light transmission, allowing for the formation of components with varying cross-sectional geometries and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional heating and drawing processes are used to form optical fiber components with irregular or tapered geometries, then the components can be formed, but the process is time-consuming and difficult to replicate precisely with variations in dimensional precision
Solution Approach 1:
The optical fiber component is divided into a glass core and a separate polymeric overmold. The glass core is formed with the desired irregular or tapered geometry using standard heating and drawing processes, while the polymeric overmold is applied separately to define the final peripheral geometry. This segmentation allows the glass core to be manufactured efficiently while the polymeric layer provides precise geometric control.
Solution Approach 2:
The invention uses a composite structure combining glass and polymeric materials. The glass core provides optical properties and structural integrity, while the polymeric overmold provides precise geometric definition and peripheral shape control. This composite approach enables both manufacturing efficiency and dimensional precision.
2Reliability
If polymeric components are used to form optical components, then durability against UV light and heat exposure is improved, but the refractive index matching and optical performance become more challenging
Solution Approach 1:
The polymeric overmold is formulated with specific refractive index parameters to match the glass core. By carefully selecting and adjusting the refractive index of the polymeric material, the invention achieves optimal optical performance while maintaining the durability benefits of polymeric materials against UV light and heat.
3Ease of manufacture
If a single continuous optical material is used, then manufacturing is simpler, but the ability to define precise peripheral geometries and tapers is limited
Solution Approach 1:
The optical component is segmented into a glass core and polymeric overmold. The glass core can be manufactured using standard processes, while the polymeric overmold is applied separately to define precise peripheral geometries and tapers that would be difficult to achieve in a single continuous material.
Solution Approach 2:
The composite structure of glass core and polymeric overmold enables the combination of manufacturing simplicity for the glass core with precise geometric control for the polymeric layer, achieving both ease of manufacture and manufacturing precision.
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 enables the precise and consistent formation of optical components with varying geometries, mimicking a single, continuous optical material, while providing durability against UV light and heat exposure, thus overcoming the limitations of traditional glass and polymeric materials.
Implementation Method 1
the glass core and optical layer combine to form a light-guiding element that behaves as similarly as practicable to a light-guiding element fabricated from a single, continuous mass of optical material having a refractive index equal to the glass-core refractive index
Data Source
AI summary
An elongated light-guiding element includes opposed incident and emission ends between which light propagates by total internal reflection. The light-guiding element includes a glass core with first and second glass core ends and a glass-core outer surface. A non-glass polymeric optical layer extends over at least a portion of the length of the glass core and is disposed peripherally thereabout. The optical layer has first and second optical-layer ends and an optical-layer exterior surface extending between the first and second optical-layer ends. The glass core and the polymeric optical layer exhibit indices of refraction that are matched to one another as closely as practicable such that the combination of the glass core and the optical layer exhibits optical properties similar to those that would be exhibited by an optical element of similar shape and dimensions fabricated from a single, continuous mass of optical material having a refractive index equal to the that of the glass core material.