| 摘要 |
An optical space communication apparatus for propagating a beam of light through free space to thereby effect communication includes transmitting device for transmitting a first optical signal converted into a beam of light, expanse angle varying device for varying the angle of expanse of the beam of light into which the first optical signal has been converted, level varying device for varying the output level of the first optical signal, control device for controlling the expanse angle varying device and the level varying device, and receiving device for receiving a second optical signal converted into a beam of light. <IMAGE> |
