OPTICAL FIBER BUNDLE

摘要

An optical fiber bundle for an endoscope or the like which can be subjected to cyclic bending at a small radius of curvature without causing fiber breakage. The fiber bundle includes a plurality of optical fibers bound at both ends but with individual fibers being freely movable inside the middle portion of the bundle, which is covered by a flexible tube. A gelling fluid coating the fibers is filled in the flexible tube.