Optical multibranching device

Abstract

Abstract PURPOSE:To reduce the loss by using a ring-shaped lens, which is formed when a convex lens is rotated around an axis which is parallel with the optical axis of the convex lens and is different from the optical axis of the convex lens, as optical parts for branching. CONSTITUTION:Optical fibers F1 and F9-F14, a convex lens L1 whose one face is plane, a ring-shaped lens L2 whose one face is plane and section has two convexes, and cores C1 and C9-C14 of optical fibers F1 and F9-F14 are provided. A luminous flux R2 which is made incident from the optical fiber F1 and has a certain spread becomes an approximately parallel luminous flux by the lens L1 and becomes a ring-shaped convergent light having a diameter alpha by the ring- shaped lens L2. In the cross-sectional view in Fig., the section of the luminous flux which becomes the ring-shaped convergent light by the ring-shaped lens L2 is indicated with a luminous flux R3 and a luminous flux R4.

Inventors

• 👤 Takeshi Nakamura
• 👤 猛 中村
• 👤 Junichiro Yamashita
• 👤 純一郎 山下
• 👤 Yoshio Miyake
• 👤 三宅　良雄
• 👤 Toshio Takei
• 👤 竹居　敏夫

Bibliographic Details