Anti-vibration device for an optical imaging system having improved drive force

An anti-vibration device for an optical system, comprising:

• an anti-vibration optical system having an optical axis;
• a lens frame supporting the anti-vibration optical system;
• a first drive force generating device contacting a first side of the lens frame to impart a movement force to the lens frame in a first direction;
• a first energizing device connected to a side of the lens frame opposite the first side of the lens frame and imparting a force to the lens frame;
• a second drive force generating device contacting a second side of the lens frame to impart a movement force to the lens frame in a second direction;
• and
• a second energizing device connected to a side of the lens frame opposite the second side of the lens frame and imparting a force to the lens frame,
• wherein the first drive force generating device imparts the movement force to the lens frame in the first direction approximately in line with a position at which the second drive force generating device contacts the lens frame and a direction in which the first energizing device is aligned, and the second drive force generating device imparts the movement force to the lens frame in the second direction approximately in line with a position at which the first drive force generating device contacts the lens frame and a direction in which second energizing device is aligned.

An anti-vibration device for an optical system, comprising:

• an anti-vibration optical system having an optical axis;
• a lens frame movable in a plane approximately perpendicular to the optical axis of the anti-vibration optical system;
• a first drive force generating device to drive the lens frame in a first direction, including
• a first drive motor,
• a first drive shaft connected to the first drive motor,
• a first moving member connected to the first drive shaft and contacting a first side of the lens frame to move the lens frame in the first direction;
• and
• a first spring connected to a side of the lens frame opposite the first side of the lens frame and imparting a force on the lens frame;
• a second drive force generating device to drive the lens frame in a second direction different from the first direction, including
• a second drive motor,
• a second drive shaft connected to the drive motor,
• a second moving member connected to the second drive shaft and contacting a second side of the lens frame to move the lens frame in the second direction, and
• a second spring connected to a side of the lens frame opposite the second side of the lens frame and imparting a force on the lens frame,
• wherein the first drive shaft imparts a force to the lens frame via the first moving member at a position which is off-center with respect to the first side of the lens frame and which offsets an angular moment acting on the lens frame generated between the second moving member and the lens frame, and the second drive shaft imparts a force to the lens frame via the second moving member at a position which is off-center with respect to the second side of the lens frame and which offsets an angular moment acting on the lens frame generated between the first moving member and the lens frame.