| 摘要 |
PURPOSE:To attain optical communication with excellent quality over a wide range by excluding interference of optical signals of plural stationary stations in the spatial light transmission between a mobile body and plural stationary stations. CONSTITUTION:Adjacent stationary stations 61-63 emit an intensity modulation light using a different wavelength. A mobile body 8 selects an optical signal with the best reception state as a reception light by a transmission reception controller 82 when optical signals of different wavelengths are received. |
