| 摘要 |
PURPOSE:To obtain an optical fiber bundle of high precision without a shift in arrangement position by forming the bundle with the cross section area greater at both the ends than at the center part, by providing a plurality of bundles in parallel, and by fixing both the ends in one body. CONSTITUTION:An optical fiber bundle is composed of the assembly of optical fiber wires 31A, 31B, 31C... of 8mumphi, for example, in the diameter of a core glass layer at both ends and of 10mumphi in the diameter of a cladding glass layer having an unrequired-light absorbing glass layer covered around the outer circumference, and diameter l1 of both end surfaces is about 2mumphi. Further, diameter l2 of the intermediate part between the end surfaces of the optical fiber bundle is made thin by being spinned and the cross section area of the intermediate part is made less than those of both the end parts to obtain the flexible structure. Consequently, there is no shift in position between both the end surfaces of the fiber bundle and high reliability can be obtained. |
