| 摘要 |
PROBLEM TO BE SOLVED: To realize a small size oscillator support structure that is suitable for oscillating a scanning mirror of a laser scanning apparatus and a sub-mirror of a radio telescope. SOLUTION: This structure is composed of a rotor 12 that is fixed to a sub-mirror 2 supported to oscillate and is curved like an arc and a stator 14. The magnetized first teeth 22 are arranged at a constant pitch at the external circumference surface 16 of rotor 12 and the stator 14 includes a base material 24, a plurality of cores (26 and others) arranged on the base material 24 and a coil 36 wound to each core. At the end of each core, the second tooth 38 is arranged with the same pitch as the first tooth 22, the second tooth 38 of each core is provided opposed to the first tooth 22 by forming a gap between the first tooth 22 of the rotor 12, and when one second tooth 38 of the adjacent two cores is provided opposed to the first tooth 22, the second tooth 38 of the other core is displaced by almost 1/4 the pitch of the second tooth 38 from the opposing position for the first tooth 22.
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