| 摘要 |
PROBLEM TO BE SOLVED: To suppress the increase of components and to reduce the cost of operation including a battery exchange operation. SOLUTION: In providing only a control station 10 with a power source and performing signal transmission and power supply to a field station 20(30) by one optical fiber 41(42), by constituting the control station 10 of a light source 131, a light receiver 132 and a light branching/coupling device 133, etc., and constituting the field station 20 of the light branching/coupling device 23, a positive lens 224, a optoelectric/electrooptic transducer 22, etc., the operation cost is reduced while enabling efficient transmission. |
