| 摘要 |
PROBLEM TO BE SOLVED: To connect many terminals (device, circuit board, etc.), and to enable a free communication of high transmission quality among the terminals. SOLUTION: According to the light intensity distribution of a light signal reception part 13 for a light signal generated by a light emission unit 121 of an optical signal transmission part 12 which is previously stored in a look-up table 15, the light intensity level of the light signal generated by the light emission unit 121 is so controlled that the light intensity level of a reception node 112 is higher than a certain value. |
