| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a master unit-side optical radio transmission device that is easily installed and to be used also as a monitor camera. <P>SOLUTION: A CMOS sensor 11b provided in the master unit-side optical radio transmission device is operated as a monitor (noctovision) camera using a near infrared light emitting section 12 as illuminating light if there is no communication request from a terminal-side optical radio transmission device, or operated as a direction prescription means for the terminal-side optical radio transmission device if there is the communication request. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
