| 摘要 |
PURPOSE:To realize indoor space light communication in a more superior way by scattering a signal light into a room with an irregular reflecting body. CONSTITUTION:Lots of irregular reflecting plates 120 are provided at a prescribed position in an indoor location such as a theater or a hall in this system, a light beam PB from a movable optical transmitter 130 is reflected irregularly by the lots of irregular reflecting plates 120 and received by one or plural optical receivers 140 to implement optical communication. The irregular reflecting plate 120 acts as an acoustic reflection plate or an absorption plate. The optical transmitter 130 is moved freely indoor or on a stage. The optical receiver 140 has a directivity and is directed in a direction in which the lots of irregular reflection plates are provided and a demodulated voice signal is outputted. |
