CN112573819B - 一种高分辨柔性光纤传像束的制备方法 - Google Patents

一种高分辨柔性光纤传像束的制备方法 Download PDF

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CN112573819B
CN112573819B CN202110000864.3A CN202110000864A CN112573819B CN 112573819 B CN112573819 B CN 112573819B CN 202110000864 A CN202110000864 A CN 202110000864A CN 112573819 B CN112573819 B CN 112573819B
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optical fiber
image transmission
acid
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preform
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CN112573819A (zh
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郭艳艳
方学舟
宋香宜
吕景文
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Changchun University of Science and Technology
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/028—Drawing fibre bundles, e.g. for making fibre bundles of multifibres, image fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
    • G02B6/06—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres the relative position of the fibres being the same at both ends, e.g. for transporting images
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

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Abstract

本发明涉及一种高分辨柔性光纤传像束制备方法。该方法包括以下步骤：1）将玻璃芯棒及酸溶棒分别在分别拉丝排列后经二次软化拉丝制备得到复丝棒；2）将复丝棒置于混合酸溶液中进行酸溶，获得柔性光纤传像束。本发明的头型光纤传像束截面为0.6mm，有效通光面积远大于50%，分辨力大于10000根/cm2。与目前传统的光纤单丝酸溶法相比，光纤的断丝率降低，排丝难度降低，光纤强度提高。

Description

一种高分辨柔性光纤传像束的制备方法
技术领域
本发明涉及一种高分辨柔性光纤传像束的制备方法。
背景技术
柔性光纤传像束是由数量不等的具有良好波导结构的光纤紧密排列而成，光纤的数量包含几千根、几万根，乃至数十万根。大信息量柔性光纤束具有体积小、种类轻、可在任意弯曲状态下进行光传输的优点，硅酸盐基质玻璃光纤传像束具有抗辐照、抗干扰、耐高温、无挥发等优点，广泛应用于新型传感、传像的工业、医疗、科研和军事领域中。
目前制造柔性光纤束的主要方法有两种：酸溶法和层叠法。酸溶法与层叠法相比可实现更小的光纤直径和更高的极限分辨率。其单丝直径可达10μm以下，分辨力可达10000根/cm2以上，因此，酸溶法是目前国内外制造高分辨柔性光纤传像束的最佳方法。然而由于酸溶玻璃管制备条件的限制，传统酸溶法通过在传像束预制棒外侧附一层酸溶玻璃细棒的形式实现酸溶层。然而该方法酸溶玻璃棒需经过三次拉丝，且在光纤结构设计时必须考虑酸溶层厚度对传像光纤的影响，即有效传像面积的占比。同时由于酸溶后每根光纤直径仅几个到十几个微米，虽然柔性很好，但光纤的强度明显降低，不利于实际应用。
CN104614804A描述一种高分辨率和低断丝率的柔性光纤传像束及其酸溶制备方法，其光纤束截面在1~5mm，最小单丝直径为3μm，最小光纤阵列单元的直径为15μm。然而由于光纤阵列单元的存在，其排丝过程极为复杂，难以实现人工排丝。
发明内容
本发明拟以实际应用为目标，通过对拉丝工艺、排丝工艺的研究获得分离度好、传像面积大、强度高的高分辨柔性光纤传像束。
技术解决方案：本发明涉及一种高分辨柔性光纤传像束，其制备方法包括以下步骤：
1）将单包层传像光纤预制棒与酸溶玻璃棒分别预热，并拉制成所需要尺寸的细棒；
2）将传像光纤与酸溶玻璃细棒排列组合成复合预制棒；
3）将复合预制棒加热，拉制成复合细棒；
4）将复合细棒再次排列后加热，拉制成硬质光纤；
5）将硬质光纤两端保护后置于35℃混合酸溶液中；
6）将酸溶后的光纤传像束两端加硅胶保护套和金属端头，并磨抛，获得柔性光纤传像束成品。
其中：
所述步骤1）中单包层传像束光纤预制棒拉制成单丝棒的过程中拉丝温度为830℃，酸溶玻璃棒的拉丝温度为750℃；
所述步骤2）中传像光纤与酸溶光纤排列组合成的复合预制棒为正六边形，内侧为传像光纤，最外一层为酸溶光纤。
本发明的技术效果主要体现在对排丝工艺的优化简化和提高酸溶后光纤传像束的强度。此外利用该方法还可制备超大截面低单丝直径的光纤传像束，进一步拓展了酸溶法制备光纤传像束的应用领域。
附图说明
图1为实施例1#样品的端面结构示意图。
具体实施方式
本发明中酸溶玻璃的2个具体实施例具体实施方案如下表所示：
实施例编号 第一次复丝排列光纤数 第二次复丝排列光纤数 总光纤数
1# 91 127 11557
2# 127 91 11557
实施例1#
1）将单包层传像光纤预制棒与酸溶玻璃棒分别预热，并拉制成1.5mm的细棒；
2）将91根传像光纤与36根酸溶玻璃细棒排列组合成正六边形复合预制棒，复合预制棒边长9mm，对顶角长18mm；
3）将复合预制棒加热，拉制成1mm复合细棒；
4）将127根复合细棒再次排列成正六边形后加热，拉制成0.7mm硬质光纤；
5）将硬质光纤两端保护后置于35℃混合酸溶液中；
6）将酸溶后的光纤传像束两端加硅胶保护套和金属端头，并磨抛，获得柔性光纤传像束成品。
该实施实例获得的光纤传像束传像光纤的单丝直径约5微米。
实施例2#
1）将单包层传像光纤预制棒与酸溶玻璃棒分别预热，并拉制成1.5mm的细棒；
2）将127根传像光纤与42根酸溶玻璃细棒排列组合成正六边形复合预制棒，复合预制棒边长10.5mm，对顶角长21mm；
3）将复合预制棒加热，拉制成1mm复合细棒；
4）将91根复合细棒再次排列成正六边形后加热，拉制成0.7mm硬质光纤；
5）将硬质光纤两端保护后置于35℃混合酸溶液中；
6）将酸溶后的光纤传像束两端加硅胶保护套和金属端头，并磨抛，获得柔性光纤传像束成品。
该实施实例获得的光纤传像束传像光纤的单丝直径约5微米。

Claims (1)

1.一种高分辨柔性光纤传像束，其特征在于，所述光纤传像束由光纤组束组成，每个光纤组束中包含若干根光纤，其制备方法包含以下步骤：
1)将单包层传像光纤预制棒与酸溶玻璃棒分别预热，并拉制成所需要尺寸的细棒；
2)将传像光纤细棒与酸溶玻璃细棒排列组合成复合预制棒，酸溶玻璃细棒位于复合预制棒的最外层；
3)将复合预制棒加热，拉制成复合细棒；
4)将复合细棒再次排列后加热，拉制成硬质光纤；
5)将硬质光纤两端保护后置于35℃混合酸溶液中；
6)将酸溶后的光纤传像束两端加硅胶保护套和金属端头，并磨抛，获得柔性光纤传像束成品。
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