| 摘要 |
PURPOSE:To eliminate the occurrence of optical defects such as distortion, blur and the like of optical fibers in the peripheral part of the end face of an optical fiber bundle for image transmission by forming the peripheral part of said fiber bundle of light absorptive fibers. CONSTITUTION:Strip-shaped fiber aggregate 22 is formed by using optical fibers 12 such as multicore optical fibers. This aggregate 22 is put in dies, by which it is pressurized, compressed and secured, to make an integral optical fiber bundle. At this time, the optical fibers 31 in the area of the peripheral part of the optical fiber bundle is formed of the light absorptive fibers formed by adding a small amount of ferric oxide or the like. Since this area of the light absorptive fibers is not used for image transmission, the problem of the degradation in the quality of image transmission on account of the deformation, disordered configuration, etc. of the optical fibers in the image transmission area is eliminated. Undesired light is absorbed in the light absorptive fiber area, and therefore the sharp light image free from distortions is transmitted and is taken out. |
