| 摘要 |
PURPOSE:To automatically and surely receive a signal by an optical receiver whichever direction an optical transmitter is directed to by providing plural light emitting elements or light emitting element groups in an optical transmitter and making plural light emitting elements or light emitting element groups transmit the signals circularly once. CONSTITUTION:When an operation button 11 of an optical signal device 10 is operated, light emitting elements 15a to 15p are automatically made emit light one by one and are stopped after one circulation by a control part 16 and a power source part 17 in an optical oscillator 10 so that optical signals from plural light emitting elements 15a to 15p can be received by a photodetector 22 in a receiver 20 directed to a specific direction. Thus, the optical receiver 20 can receive the signal whichever direction the optical transmitter is directed to. Further, the current for light emission is reduced. |
