| 摘要 |
PURPOSE:To improve a received light quantity by connecting an optical signal transmitter-receiver in which an optical axis of a light emitting element and that of a light receiving element are set in the same direction to each device via an optical signal distributer so as to make a directional angle of a light signal narrow. CONSTITUTION:An optical signal distributer 25 is provided with a discrimination means of light reception intensity a display means displaying the result of discrimination and a reflector. Then the optical axis of a light emitting element and that of a light receiving element in optical signal transmitter-receiver sets 23, 24 are set in the same direction. When the optical axis of the light emitting element is set in the middle of a reflecting section by a display LED of the optical signal distributer 25, the light receiving element is set in the middle of the reflection section. Thus, the transmission reception of the optical signal between optional light emitting element and light receiving element are facilitated and a large received light quantity is obtained by making the direction angle narrower. |
