OPTICAL WIRELESS TRANSMISSION DEVICE, OPTICAL AXIS ADJUSTING METHOD FOR OPTICAL WIRELESS TRANSMISSION DEVICE, OPTICAL WIRELESS COMMUNICATION METHOD, AND OPTICAL WIRELESS TRANSMISSION SYSTEM

摘要

PROBLEM TO BE SOLVED: To suitably use an optical wireless transmission device which transmits signals by optical wireless, indoors by making the device small-sized and adjusting an optical axis quickly with high precision.;SOLUTION: A 1st photodetecting element 6 for optical axis adjustment which receives light for optical axis adjustment and a 2nd photodetecting element 36 which receives communication light are provided in the same photodetection area, and an optical control element 3 which reflects part of incident light and transmits the rest and a reflection optical system 4 whose angle of deflection to the optical axis of the incident light can be controlled are combined, while the 2nd photodetecting element 36 receives communication light from an opposite device, the angle of deflection of the reflection optical system 4 is controlled according to the light for optical axis adjustment that the 1st photodetecting element 6 receives to coaxially adjust the optical axis of the communication line sent to and received from the opposite device.;COPYRIGHT: (C)2005,JPO&NCIPI