| 摘要 |
PROBLEM TO BE SOLVED: To provide a position controller for an optical element that is capable of movement for correcting image blur and inserting and releasing movement in an optical axis, the position controller achieving highly accurate driving of an optical element in a simple structure.SOLUTION: In a position controller, a vibration-proofing mechanism energizes two coils provided on one of a support member and a vibration-proofing movable member, and generates thrust in a direction perpendicular to each boundary of magnetic force of two permanent magnets provided on the other of the support member and the vibration-proofing movable member. On the vibration-proofing movable member, an inserting/releasing member that inserts/releases an optical element into/from an optical axis of an imaging optical system is pivotally supported. Two permanent magnets are symmetrically arranged with respect to a first reference plane containing the optical axis, and have an inclination such that each boundary of magnetic force approaches the first reference plane as it separates from a second reference plane perpendicular to the first reference plane and through the optical axis. Viewing along the optical axis, a rotational axis of the inserting/releasing member is provided in one of both areas located on either side of the second reference plane, with the one area being opposite to the other area provided with each permanent magnet and each coil. In the one area, a central angle based on the optical axis is 15 degrees normally and reversely on either side of the first reference plane. |
