| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that other magnetic circuit may be affected by the inflow of leakage flux in a light quantity adjusting device formed by using yokes constituting a plurality of magnetic circuits in common as a base member. SOLUTION: The light quantity adjusting device is equipped with: a plurality of light shielding members 3 and 4 controlling light quantity; a plurality of driving means 5 and 5' respectively driving the plurality of light shielding members 3 and 4 by obtaining electromagnetic driving force in the magnetic circuit; and the base member 1 to which the plurality of light shielding members 3 and 4 and the plurality of driving means 5 and 5' are attached. The base member 1 serves as the yokes Y and Y' constituting the magnetic circuit of the plurality of driving means 5 and 5', and the yokes used for the plurality of driving means 5 and 5' use the common yoke. The base member 1 is provided with a prevention means 1K preventing the inflow of the leakage flux at the middle part of the plurality of driving means 5 and 5'. COPYRIGHT: (C)2007,JPO&INPIT
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