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光纤拉丝过程中必须对纤丝外径进行精密测控,但是通常用于圆柱形物体动态非接触测量的方法(如相关光通量比较法、电压鉴别法、补偿光通量法等等)精度太低,测量范围难适于光纤测量。本文介绍了四种测量高速运动的光纤外径很有效的非接触式激光光学测量方法:1.前向光散射法。它测量的是激光束射到光纤上的散射角和散射条纹;2.后向光散射法。它测量后向散射条纹的间隔; 3.直接衍射法。它测量激光束直射到光纤上产生的衍射图象;4.计量光脉冲法。它测量与光纤外径有关的光脉冲效。文中还对此四种方法进行了讨论。
However, the methods usually used for the dynamic non-contact measurement of cylindrical objects (such as the related luminous flux comparison method, voltage identification method, compensated luminous flux method, etc.) are too low in precision. The measurement range Difficult for fiber measurement. This article describes four non-contact laser optical measurements that are effective for measuring the OD of high-speed fibers: 1. Forward light scattering. It measures the scattering angle and the scattering streak of the laser beam onto the fiber; 2. The backward light scattering method. It measures the backscatter fringe spacing; 3. Direct diffractometry. It measures the direct laser beam to produce diffraction images on the fiber; 4. Measuring light pulse method. It measures the optical pulse effect associated with the OD of the fiber. The article also discusses these four methods.