| 摘要 |
PROBLEM TO BE SOLVED: To reduce energy required for transmission by controlling emitted light quantity of a flash emitting means according to quantity of information to be transmitted, and to prevent mis-emitting (transmission leakage) caused by too much decrease in a condenser voltage during transmission. SOLUTION: A transmitter microcomputer 109 reads a setting of a setting means 110, and sets IMAX and transmission data as emitted light quantity transmission data according to the number of read emitted light. Next, the transmitter microcomputer 109 processes the charged voltage of a main capacitor 103 by A/D conversion, and reads it. Next, the set IMAX outputs emission intensity data for setting from the transmitter microcomputer 109 to a DA converter 114. Thus, the transmitter transmits luminescence mode, emitted light quantity, that is, emitting, non-emitting of a discharge tube 105 to a receiver as a digital data of 1 or 0. And, an emission intensity of the optical transmission pulse is adjusted by setting the power output of DA converter 114 according to the number of emitted lights of the receiver set by the setting means 110. |
