| 摘要 |
PURPOSE:To achieve the improvement in switching reproducibility by insertably disposing a reflecting body between a pair of lenses. CONSTITUTION:A reflecting body 6 consisting of a prism, mirror or the like whose light reflecting surfaces 71, 72 are mutually parallel planes is insertably disposed between the first lens 41 which converts the exit light from an optical transmission path 1 to parallel light and the second lens 42 or 43 which focuses parallel light. If with this arrangement the reflecting body 6 is moved by a moving device 8 constituted by an electromagnet or the like and is evacuated from between the first, second lenses 41, 42, then the exit light of the optical transmission line 1 enters the optical transmission line 2. When part thereof is inserted between the first, second lenses 41, 42, then the parallel light is subsequently reflected on the light reflecting surfaces 71, 72 by the first lens 41 and enters the optical transmission line 3 by way of the second lens 43, thus switching of good reproducibility is accomplished. |
