| 摘要 |
PURPOSE:To automatically adjust an axis shift and easily search for a communication target as well as communicate more information irrespective of adverse influence or the like of external noise. CONSTITUTION:Since diffusion light 14, 15 is emitted to each other at the time of searching for communication targets, a wider searching range at the time of emission than a case where condensed light is used can be obtained to facilitate searching. In addition since a light transmitting/receiving part rotates in horizontal and elevation angle directions, searching can be done easily and securely even if there is difference in height between both communicators. If communication is performed with condensed light 13, transmission/reception with high frequency signals is possible, a loss due to light diffusion can be further reduced, and also adverse influence of external noise can be prevented, thereby enabling communication of much data. |
