| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply for spatial light transmission system in which a rush current at the application of the power supply is reduced and a voltage drop due to an overcurrent is prevented and the power supply is safely and surely started. SOLUTION: This power supply is used for a spatial optical transmission system in which plural stationary stations K1-Kn installed at intervals and mobile stations P placed movably use a spatial light to send signals. A power supply unit 2 is connected to plural stationary stations K1-Kn via a power supply line 4a in cascade. A switch contact 5 is connected in series with an internal power supply line 4b in each stationary stations connected in series with the power supply line. Each switch contact is closed sequentially with a prescribed delay time set to each delay circuit 9 so that the power supply is applied sequentially to each stationary station K1-Kn through the power supply line 4a and the internal power supply line 4b. |
