Ink Stream Optical Fiber Marking for High-Speed Precision
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Solution Overview
Problem
Current methods for marking optical fibers, such as color-based coding and inkjet printing, are limited in speed and quality, particularly when trying to mark multiple fibers effectively without gaps or uneven markings.
Innovation Solution
The use of an ink stream to mark optical fibers by moving them over a fiber path, with a positioning device adjusting the fiber's position to intersect the ink stream, allowing for high-speed marking with improved quality and visibility, and the application of a protective overcoat for durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If inkjet printing is used to mark optical fibers, then marks can be formed on the fiber surface, but the marking speed must be kept relatively slow to achieve high-quality marks without gaps or unevenness
Solution Approach 1:
The patent replaces the mechanical inkjet printing system with an electrostatic field-based marking system. Electrons are accelerated through a high voltage field (e.g., 10-50 kV) to create a charged particle beam that marks the fiber. This substitution of mechanical ink deposition with electrostatic field interaction enables high-speed marking (fiber speeds >10 m/s) while maintaining mark quality, as the electrostatic field can be precisely controlled and applied continuously without the mechanical constraints of inkjet droplet formation and placement
Solution Approach 2:
The patent changes the fundamental parameters of the marking process by using charged particles (electrons) instead of liquid ink, and by applying high voltage fields (10-50 kV) instead of mechanical pressure. These parameter changes allow the marking to occur at much higher speeds while maintaining precision, as the electrostatic field can be modulated rapidly and applied over a broader process window without the quality degradation that limits inkjet printing speed
2Adaptability or versatility
If color-based coding schemes are used for optical fiber identification, then fiber identification can be achieved, but there are insufficient colors for effectively coding more than about eighteen optical fibers
Solution Approach 1:
The patent applies local quality by creating unique marking patterns at specific locations on the fiber rather than relying on overall fiber color. Different segments or positions along the fiber can have distinct mark characteristics (presence/absence of marks, mark density, mark position), enabling identification of many more fibers than the limited color palette allows. This localized differentiation multiplies the identification capacity beyond the constraint of having only ~18 distinguishable colors
Solution Approach 2:
The patent uses electrostatically-induced color changes in the fiber material itself. By applying high voltage fields to specific regions of the fiber, the material's optical properties change, causing it to appear different colors or exhibit different optical characteristics. This dynamic color change capability provides virtually unlimited identification options, as any fiber can be marked to display different colors or patterns on demand, rather than being limited to a fixed set of dye colors
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 method enables high-speed marking of optical fibers with improved quality and visibility, allowing for efficient identification and protection of marks, even at high line speeds, and supports the use of various ink types and viscosities.
Implementation Method 1
the ink from the ink stream coats a select axial length of the optical fiber over at least a portion of its outer surface
Data Source
AI summary
A method of marking an optical fiber is disclosed, wherein the method includes forming an ink stream, moving an optical fiber over a fiber path that resides adjacent the ink stream, and periodically changing the position of the fiber path so that the optical fiber at least partially enters the ink stream so that the ink from the ink stream forms spaced apart marks on the outer surface of the optical fiber. An optical fiber marking apparatus is also disclosed that includes payout and take modules that move the optical fiber over the fiber path, a marking unit configured to form an ink stream adjacent the fiber path, and a fiber positioning device that causes the optical fiber to periodically intersect the ink stream so that ink from the ink stream forms spaced apart marks on the outer surface of the optical fiber.