| 摘要 |
PURPOSE: A shutter device is provided to arrange two magnetic cores in an outer circumference of the first light hole symmetrically on a base, thereby reducing a physical volume. CONSTITUTION: A shutter device includes a base, an electromagnetic valve, a blade, and a cover plate. The base(1) is formed on the center of the first light hole(11) for passing light. The electromagnetic valves(2a, 2b) include a magnetic core and a coil unit. The magnetic cores(21a, 21b) have two end parts. The coil units(22a, 22b) are wound in a circumference of this magnetic core.
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