| 摘要 |
In an infrared spatial communication system which comprises first and second data communication devices (1 and 2) and which carries out spatial communication from the first data communication device to the second data communication device by the use of an infrared ray, the second data communication device has a reflector (28) for reflecting, as a reflected infrared ray, the infrared ray which is transmitted from the first data communication device and which carries transmission data. The first data communication device has a transmitter (13, 14) for transmitting, in response to original communication data, the infrared ray which carries the original communication data as the transmission data. The second data communication device further has a receiver (25, 26) for receiving the infrared ray carrying the transmission data to produce the transmission data as primary reception data. The first data communication device further has another receiver (15, 16) for receiving the reflected infrared ray to produce, as subsidiary reception data, the transmission data carried by the reflected infrared ray. A controller (11, 12) of the first data communication device controls the transmitter so that the transmitter again transmits, when the subsidiary reception data are not coincident with the original communication data, the infrared ray which carries the original communication data. Preferably, the reflector is a hemispherical mirror. <IMAGE> |
