| 摘要 |
PURPOSE: To fix an optical fiber, to prevent deviation in an optical axis from being generated, to miniaturize whole switch, to be self-held by a first and second permanent magnets in a state where an optical filter is bulged out between the end surfaces of the optical fibers and in the state where it is inside between the end surfaces and to eliminate an effect of a power failure. CONSTITUTION: Switching is performed by taking in/out the optical filter 27 between the end surfaces of the optical fibers 25a, 25b. When a current flows through a coil 31, and a movable body 29 is magnetized to the same polarity as the first permanent magnet 37 in the state where the optical filter 27 is outside between the end surfaces of the optical fibers 25a, 25b, the movable body 29 is moved to the second permanent magnet 39, and the optical filter 27 enters between the end surfaces of the optical fibers 25a, 25b. In such a state, when the current in the opposite direction flows through the coil 31, and the movable body 29 is magnetized to the same polarity as the second permanent magnet 39, the movable body 29 is moved to the first permanent magnet 37. |
