UV-Curable Ferrule End Face Encapsulation Device
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Solution Overview
Problem
Existing fiber optic connectors face contamination issues despite end caps, as particles can migrate from within the caps to the connector end face during transport, leading to signal loss and potential damage, necessitating time-consuming cleaning that risks further damage.
Innovation Solution
A device and method integrating end face cleaning, verification, and encapsulation into a single housing, using a ferrule end face cleaning device, inspection scope, and UV-curable vinyl-terminated polydimethylsiloxane coating to protect the optical fiber end face, preventing contamination and ensuring cleanliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If end caps are used to protect the end face, then contamination prevention is improved, but particle migration from interior of end cap to end face occurs during transport
Solution Approach 1:
The end face is cleaned and inspected before the connector is assembled with the end cap. This preliminary action ensures that the end face is free of contaminants before protection is applied, and allows any potential issues to be detected before the connector enters transport conditions where particle migration could occur.
Solution Approach 2:
A dust cap assembly with a sealant is introduced as an intermediary between the end face and the external environment. The sealant acts as a barrier that prevents particles from the interior of the end cap from migrating to the end face during transport, while still allowing the end face to be protected.
2Object-affected harmful factors
If manual cleaning is performed prior to installation, then end face contamination is reduced, but time is consumed and risk of damage increases
Solution Approach 1:
The cleaning and inspection actions are performed as preliminary steps before the connector is assembled and shipped. By completing these actions in advance in a controlled environment, the connector can be stored with end caps without requiring time-consuming manual cleaning before installation, thereby reducing both time loss and the risk of damage from repeated handling.
3Adaptability or versatility
If cleaning and encapsulation are performed separately, then process flexibility is improved, but contamination risk between steps increases
Solution Approach 1:
The cleaning, inspection, and encapsulation processes are merged into a single integrated device that performs all actions in one location. The ferrule end face cleaning device, inspection scope, and UV-curable vinyl-terminated polydimethylsiloxane coating are all housed together, allowing the end face to be cleaned and inspected immediately before encapsulation without exposure to external contamination risks.
4Object-affected harmful factors
If UV-curable coating is applied to the end face, then protection against contamination is improved, but residue may remain upon removal
Solution Approach 1:
The patent specifies the use of UV-curable vinyl-terminated polydimethylsiloxane coating, which undergoes chemical parameter changes during curing to form a protective layer. This coating is designed to provide protection against contamination while being removable without leaving significant residue, addressing both the protection requirement and the residue issue through careful selection of materials and curing parameters.
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 integrated solution effectively prevents contamination and ensures optimal optical performance by automating the cleaning and encapsulation process, reducing manual handling and exposure risks, while the UV-curable coating leaves minimal residue upon removal.
Implementation Method 1
coating the end face of the optical fiber in a molding cavity... UV-curable vinyl-terminated polydimethylsiloxane coating
Data Source
AI summary
Disclosed herein are devices and methods for cleaning, verifying cleaning, and coating a ferrule end face in a single housing thereby preventing contamination of the ferrule end face and associated optical fiber end face. Also disclosed herein is a fiber optic assembly including a ferrule; an optical fiber extending through the ferrule to an end face of the ferrule; and a coating on the end face of the ferrule protecting the optical fiber. The coating is prepared by curing a vinyl-terminated polydimethylsiloxane with a crosslinker in the presence of a catalyst.