近年来由于光纤 技术得到飞速发展, 纤维内窥镜日益增 多,使它在临床医学上的应用越来越广泛。光纤内 窥镜已从单纯的诊断过渡到通过内窥镜进行治疗, 从而开辟了医学上的一个新领域一介入医学或管腔 医学(Interventional Medicine)。 目前使用的光纤大致可分为两种,一种是阶跃 型光纤,其结构是将传光用的纤芯用折射率比它小 的包层包住;另一种是梯度折射率型光纤,其结构是 In recent years, due to the rapid development of optical fiber technology, the number of fiber endoscopes has increased, making it more and more widely used in clinical medicine. Fiber optic endoscopes have transitioned from simple diagnostics to endoscopic treatment, opening up a new area of ​​medical intervention medicine or interventional medicine. Currently used fibers can be broadly classified into two types. One is a stepped optical fiber whose structure is to encapsulate the core for light transmission with a cladding whose refractive index is smaller than the cladding; the other is gradient-index optical fiber. , whose structure is