大约在十九世纪七十年代,人们通过观察光线能沿着酒桶中流出来的酒而弯曲传输的情况,知道了当导光体的外表比芯子的折射率低时,光线就会在芯子中反复进行全反射,弯曲地向前传输。1927年贝尔德和汉塞尔等提出了用导光的细丝(光导纤维)传递光学图像的设想;五十年代后期,光导纤维开始在医疗上用于观察人体 Around the 1870s, people watched the transmission of light by observing the light rays that flowed out of the barrel, knowing that when the outer surface of the light guide had a lower index of refraction than the core, the light would fall on the core Sub-repeated repeated total reflection, curved forward transmission. In 1927, Baird and Hansel proposed the idea of ​​transmitting optical images with light-guiding filaments (optical fibers); in the late fifties, optical fibers began to be medically used to observe the human body