| 摘要 |
PROBLEM TO BE SOLVED: To actualize stable optical communications by recognizing and adjusting the light quantity of a light signal without equipping a transmitter/ receiver itself with a means for detecting the quantity of light. SOLUTION: The level of the light signal outputted from a transmission part 20 of the transmitter/receiver 1A is received by a transmitter/receiver 1B, which decides whether the level of the light signal is suitable for data communication. The transmitter/receiver 1B outputs the decision result to the transmitter/receiver 1A, which decides whether the light signal that the transmitter/receiver 1A has outputted is excellently received and sets the output level of the light signal according to the decision result. |
