| CPC G03B 17/12 (2013.01) [G03B 13/34 (2013.01); G03B 2205/0069 (2013.01)] | 12 Claims |
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1. A drive device that drives a first optical system and a second optical system disposed along an optical axis direction, the device comprising:
a first member including a first magnet, a second magnet disposed along the optical axis direction together with the first magnet, a first yoke that holds the first magnet and the second magnet, and a second yoke disposed between the first magnet and the second magnet;
a first coil that is bonded to the first optical system and corresponds to the first magnet; and
a second coil that is bonded to the second optical system and corresponds to the second magnet,
wherein the first member drives the first coil by an electromagnetic force generated in the first coil and drives the second coil by an electromagnetic force generated in the second coil,
a thickness of the second yoke is larger than a thickness of the first yoke,
wherein, in a case in which dimensions of the first magnet and the second magnet in the optical axis direction are length dimensions, dimensions of the first optical system and the second optical system in a tangential direction of a circle about an optical axis are width dimensions, a dimension in a radial direction intersecting the optical axis direction and the tangential direction is a thickness dimension, and a force generated by energizing the first coil and the second coil is a thrust, and
the width dimensions are set to dimensions in which a ratio of an increase amount of the thrust to an increase amount of the width dimension is equal to or more than a threshold value in a case in which the length dimensions and the thickness dimension are fixed values.
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