Fiber Optic Adapter Shutter and Alignment Sleeve Holder
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Solution Overview
Problem
Fiber optic adapters without shutters are prone to optical signal degradation due to misalignment and contamination, posing risks of eye damage from high-powered light signals and compromising signal integrity.
Innovation Solution
A duplex fiber optic adapter design featuring a shuttered front end and a non-shuttered rear end, with a shutter door biased to close and prevent contamination, and a robust construction to maintain alignment and secure connectors, including floating alignment sleeves and a one-piece main housing for precise indexing and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fiber optic adapter includes shutters to block contaminant intrusion and high-powered light signals, then protection against contamination and eye damage is improved, but device complexity increases
Solution Approach 1:
The adapter is divided into distinct functional segments: a shutter assembly with movable shutter doors for contamination and safety protection, and a separate alignment sleeve assembly for precise ferrule alignment. This segmentation allows each component to perform its specific function independently, managing complexity through modular design while maintaining reliable protection mechanisms.
Solution Approach 2:
The alignment sleeve holder integrates multiple functions into a single component: it holds and aligns the alignment sleeves, provides structural support for the ferrules, and maintains the precise coaxial alignment necessary for optimal optical coupling. This merging reduces the number of separate parts while achieving the same protective and alignment objectives.
2Reliability
If alignment sleeves are used to ensure concentric alignment of ferrules, then optical signal degradation is minimized, but manufacturing precision requirements increase
Solution Approach 1:
The alignment sleeve holder creates a standardized reference framework that establishes uniform alignment conditions for all ferrules. By providing a common holder structure with precision-machined features, the system ensures that all aligned ferrules achieve the same level of concentricity, making the alignment process more controllable and less sensitive to individual manufacturing variations.
Solution Approach 2:
The alignment sleeve acts as an intermediary component between the ferrules and the holder structure. It transmits the precise alignment references from the holder to the ferrules, enabling accurate coaxial alignment without requiring the ferrules themselves to be manufactured with extremely tight tolerances. The alignment sleeve absorbs and compensates for minor dimensional variations.
Data Source
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AI summary
A fiber optic adapter with a housing defining an open-ended through-channel having a first port at one end and a second port at another end. The first and second ports being configured to receive first and second fiber optic connectors, respectively. The adapter may include a shutter door and a biasing member. The shutter door automatically transitions to an open position when the first connector is inserted into the first port and is automatically transitioned to the closed position by the biasing member when the first connector is removed from the first port. The adapter may include a cover and an alignment sleeve. The cover has a cylinder positioned inside the through-channel of the housing. The cylinder has a bore in which the alignment sleeve is positioned. The alignment sleeve has an open-ended through-channel configured to receive first and second ferrules of the first and second connectors, respectively.