| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical spatial transmission system for achieving data transmission with much higher secrecy, without requiring optical axis adjustment to a mobile terminal user. <P>SOLUTION: Pilot light outputted from an information transmitter 200 is reflected in a reflection area 121 of an optical element 120 of an information terminal 100, the position of a transmission area 122 is detected from its reflection light pattern, and an optical signal is outputted only to the transmission area and the periphery thereof. <P>COPYRIGHT: (C)2008,JPO&INPIT |
