| 摘要 |
PURPOSE:To decrease the transmission influence caused by a shift of an optical axis, and also, to reduce the cost of equipment of the whole transmission system by attaching a rotating side member onto the same axis against a fixing side member, and providing plural different diameter annular surface light receiving (emitting) elements. CONSTITUTION:A plug 2 is fitted and attached rotatably to a receptacle 5 through a bearing 8. A cable including four pieces of optical fibers 1 is led to the plug 2, and to the receptacle 5, a signal cable 3 including four pieces of lead wires 1' of receiving and sending electric signals of light receiving and emitting elements is connected. On the surface vertical to a revolving shaft '0' in the receptacle 5, a light receiving and emitting diode 4 on the shaft '0' and three pieces of different diameter annular surface light receiving (emitting) diodes 6 using said diode as an axis center are stuck. The diodes 4, 6 consist of light receiving (emitting) diode elements, and a lead wire 1' is connected to connecting surfaces 4a, 6a. Also, the fiber 1 is led to light receiving and emitting surfaces 4b, 6b of the diodes 4, 6 and its end faces are opposed. In such a way, an optical-electric conversion is executed without using separately a converter. |
