一种抗弯曲高分辨率传像光纤的制备方法及传像光纤

By using porous sleeves and inner cladding design in the fabrication of image transmission fibers, the problems of irregular fiber core arrangement and insufficient bending resistance have been solved, resulting in image transmission fibers with high resolution and excellent bending resistance, suitable for applications such as endoscopes.

CN118307194BActive Publication Date: 2026-07-17YANGTZE OPTICAL FIBRE & CABLE CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANGTZE OPTICAL FIBRE & CABLE CO LTD
Filing Date
2024-03-25
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing methods for fabricating optical fibers for image transmission cannot achieve both high resolution and bending resistance. Irregular fiber core arrangement, easy deformation, and severe signal crosstalk result in insufficient image clarity and bending resistance.

Method used

A porous cladding is used to constrain the arrangement of monofilaments. By setting small-diameter through holes in a pure silica glass cladding, monofilaments of different types and diameters are inserted. Combined with an inner cladding and a recessed cladding, the fiber is drawn into a shape-transmitting optical fiber, ensuring the regularity of the fiber core and its resistance to bending.

Benefits of technology

It achieves high resolution and excellent bending resistance in image transmission optical fiber, with regular fiber core arrangement and low signal crosstalk, making it suitable for use in endoscopes and other applications.

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Abstract

本发明涉及一种抗弯曲高分辨率传像光纤的制备方法及传像光纤,包括制作芯棒,拉制单丝,制作多孔套管,配制传像光纤预制棒:将单丝插入填充至多孔套管的各小径通孔中,相邻小径通孔中插入不同类型或不同单丝包层直径的单丝,制备得到传像光纤预制棒;最后拉制传像光纤。本发明使用密集小径多孔套管替代传统的大单孔套管,拉丝后光纤各个纤芯能够按照设计要求保持排列规整,各纤芯形状畸变小,纤芯间隔排布规整,纤芯间串扰小,光纤分辨率和对比度高,光纤传像质量好。同时光纤抗弯曲性能好,使用半径小,尤其适合在内窥镜方面的使用。
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