| 摘要 |
PURPOSE:To reduce external influence of temperature, an external magnetic field, etc., by forming a long hole in both side end parts of a movable body, and fitting a driving coil to one-side opening parts of both long holes. CONSTITUTION:The movable body 12 made of aluminum is supported elastically on a base 26 with a spring 27 which is energized by a thin plate made of stainless steel. A movable body 22, on the other hand, has a mirror 21 mounted at its top surface center part and is provided with short coils 23a and 23b and rectangular long holes 24a and 24b at both sides. Then, driving coils 25a and 25b are attached in one-side opening parts of the long holes 24a and 24b and yokes 29a and 29b of magnetic circuits 28a and 28b provided outside of both sides of the movable body 22 are inserted into the long hole 24a and driving coil 25b. Consequently, external influence of temperature and an external magnetic field is reduced. |
