| 摘要 |
The rod-shaped light guide (10) comprises a light entrance side end (18) and a light exit side end (20), which has an optical fiber (30) in a multicore portion (14). The light guide comprises a monocore portion (12) and the multicore portion. The monocore portion has a length, which comprises 1 to 5 times the diameter of the monocore portion. The monocore portion or the optical fibers of the multicore portion is made of a core glass and a coating glass. The monocore portion is surrounded by a sleeve. |
