Fiber Optic Connector Adhesive Management via Ferrule Recesses
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Solution Overview
Problem
Current adhesive dispensing systems face challenges in precisely applying adhesive to fiber optic connectors, particularly in maintaining an air gap between lens elements and windows, which can lead to adhesive interference with optical transmissions due to limitations in adhesive volume and positioning accuracy.
Innovation Solution
The use of textured surfaces on the ferrule, including recessed formations and fiber support features, allows for a greater volume of adhesive to be applied without spilling over, ensuring accurate positioning and minimizing interference with the optical path by accommodating the adhesive volume and reducing the required resolution of dispensing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a greater volume of adhesive is applied to ensure accurate positioning, then bonding reliability is improved, but adhesive spill-over interferes with optical transmissions
Solution Approach 1:
The adhesive application area is segmented into multiple recessed formations (cavities, grooves, or dimples) on the ferrule surface. These recesses divide the adhesive volume into discrete compartments, allowing greater total adhesive volume to be applied while preventing spill-over into the optical path. Each recess acts as an independent containment zone for the adhesive material.
Solution Approach 2:
The recessed formations act as an intermediary structure between the adhesive and the optical components. By providing designated receptacles for the adhesive, the recesses mediate the interaction between the bonding material and the optical path, ensuring that adhesive is contained in specific zones and does not migrate to areas that would interfere with light transmission.
2Manufacturing precision
If adhesive dispensing precision is increased to prevent spill-over, then optical performance is maintained, but manufacturing complexity and cost increase
Solution Approach 1:
The ferrule surface structure provides self-contained recessed formations that automatically contain the adhesive through their geometric design. This self-service approach eliminates the need for highly precise dispensing control, as the recesses inherently limit adhesive spread and positioning. The structure itself performs the containment function that would otherwise require sophisticated dispensing systems.
Solution Approach 2:
The invention changes the physical parameters of the ferrule surface by adding recessed formations with specific dimensions, depths, and volumes. These parameter changes create a tolerance buffer that accommodates variations in adhesive dispensing without affecting the final outcome. The recesses provide a volume threshold that absorbs dispensing imprecision while still preventing optical path contamination.
3Reliability
If adhesive volume is increased to accommodate positioning tolerances, then assembly reliability is improved, but the air gap between lens elements and window may be compromised
Solution Approach 1:
The excess adhesive volume is extracted and contained within the recessed formations on the ferrule surface. By providing dedicated storage spaces for the adhesive, the recesses allow the air gap between the lens elements and window to be maintained at the required thickness while still accommodating sufficient adhesive volume for reliable bonding and positioning tolerance compensation.
Solution Approach 2:
The invention addresses the volume-thickness conflict by transitioning to another dimension. Instead of increasing adhesive volume in the same plane (which would reduce air gap thickness), the recessed formations create a third dimension (depth) for adhesive containment. This vertical dimension allows greater adhesive volume while maintaining the horizontal air gap dimensions required for optical performance.
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
This solution effectively reduces adhesive spill-over and ensures consistent bonding, maintaining the air gap and optical performance by allowing a larger adhesive volume to be contained within the defined footprint area, improving the precision and reliability of fiber optic connector assembly.
Implementation Method 1
at least one component coupled to a surface of the ferrule by an adhesive
Data Source
AI summary
A fiber optic connector includes a ferrule configured to receive and support one or more optical fibers and at least one component coupled to a surface of the ferrule by an adhesive. The at least one component overlays a footprint area defined on the surface to which the adhesive is applied, and the surface has a plurality of recessed formations within the footprint area to accommodate the adhesive.