| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To achieve miniaturization of each of optical transmitting and receiving systems and flexibility of laying out by separating a light emitting element or a light receiving element from start and terminal points of optical spatial communication. <P>SOLUTION: Only the light emitting element 111 and its drive circuit 112 are incorporated in an optical transmission part 11, and signal light emitted from the light emitting element 111 is guided to a prescribed position by an optical waveguide 12 to discharge the signal light L with a prescribed spot size to a space by a transmission lens 13. A receiving lens 21 is arranged at an opposite receiving position, the signal light transmitted spatially from the transmission lens 13 is condensed, guided to a light receiving part 23 by an optical waveguide 22 and the signal light from the optical waveguide 22 is received with the light receiving element 231, and the received signal is demodulated to obtain the original transmission signal. In the configuration, only lens parts at the transmission side and the receiving side may be accurately aligned while facing, and arrangement/size or the like of the optical transmission part 11 and the optical receiving part 23 are not restricted. In addition, a power supply facility in the vicinity of the lenses is not needed. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
