JP2012237871A5

JP2012237871A5 -

Info

Publication number: JP2012237871A5
Application number: JP2011106668A
Authority: JP
Filing date: 2011-05-11
Publication date: 2014-07-03

Description

本発明のブレ補正ユニットは、固定部材（３）と、光学系（２０）を支持し、光学系を光軸と垂直な平面内で固定部材に対して目標位置まで相対移動させる可動部（２）と、可動部を固定部材に対して相対移動可能に支持する複数の弾性部材（１１）と、を備え、前記複数の弾性部材のうち少なくとも１つの弾性力が、他の弾性部材の弾性力と異なるブレ補正ユニット（１００）である。
The blur correction unit of the present invention supports the fixed member (3) and the optical system (20), and moves the optical system relative to the fixed member relative to the target position in a plane perpendicular to the optical axis (2 ) And a plurality of elastic members (11) that support the movable portion relative to the fixed member, and at least one elastic force of the plurality of elastic members is an elastic force of another elastic member. This is a shake correction unit (100) different from FIG.

本発明のブレ補正ユニットは、固定部材と、光学系を支持し、前記光学系を光軸と垂直な平面内で前記固定部材に対して目標位置まで相対移動させる可動部と、前記可動部を前記固定部材に対して相対移動可能に支持する弾性部材と、前記可動部の重心まわりの振動を減衰させる減衰機構と、を備えるブレ補正ユニットである。
The blur correction unit of the present invention includes a fixed member, a movable part that supports the optical system, and moves the optical system relative to the fixed member in a plane perpendicular to the optical axis to a target position. The blur correction unit includes an elastic member that is supported so as to be relatively movable with respect to the fixed member, and an attenuation mechanism that attenuates vibration around the center of gravity of the movable portion .

また、本発明では、前記可動部の前記光軸と垂直な平面内での並進軸に沿った並進運動の固有振動数と、前記可動部の重心まわりの回転運動の固有振動数との比が、前記光学系の前記目標位置と前記光学系の実位置との残差を許容値以下とする値をとるよう、弾性部材の配置位置、弾性部材の弾性力、可動部に含まれる部品の形状、及び可動部に含まれる部品の配置位置の少なくとも１つが調整されていることができる。さらに、本発明では、前記可動部の前記光軸と垂直な平面内での並進軸に沿った並進運動の固有振動数と、前記可動部の重心まわりの回転運動の固有振動数との比が、前記光学系の前記目標位置と前記光学系の実位置との残差を、許容値以下とする値をとることができる。
In the present invention, the ratio of the natural frequency of the translational motion along the translation axis in a plane perpendicular to the optical axis of the movable part and the natural frequency of the rotational motion around the center of gravity of the movable part is The arrangement position of the elastic member, the elastic force of the elastic member, and the shape of the component included in the movable part so that the residual between the target position of the optical system and the actual position of the optical system is not more than an allowable value. , And at least one of the arrangement positions of the parts included in the movable part may be adjusted. Furthermore, in the present invention, the ratio between the natural frequency of translational motion along the translational axis in a plane perpendicular to the optical axis of the movable portion and the natural frequency of rotational motion around the center of gravity of the movable portion is The residual between the target position of the optical system and the actual position of the optical system can be a value that is less than or equal to an allowable value .

Claims

A fixing member;
A movable part that supports the optical system and moves the optical system relative to the fixed member in a plane perpendicular to the optical axis to a target position;
A plurality of elastic members that support the movable portion so as to be relatively movable with respect to the fixed member;
With
The blur correction unit characterized in that at least one elastic force among the plurality of elastic members is different from the elastic force of the other elastic members .

A fixing member;
A movable part that supports the optical system and moves the optical system relative to the fixed member in a plane perpendicular to the optical axis to a target position;
An elastic member that supports the movable part so as to be relatively movable with respect to the fixed member;
Stabilization unit, characterized in that it comprises a damping mechanism for damping vibrations of the center of gravity around the movable portion.

The ratio of the natural frequency of the translational motion along the translational axis in the plane perpendicular to the optical axis of the movable part and the natural frequency of the rotational motion around the center of gravity of the movable part is the ratio of the natural frequency of the optical system. An arrangement position of the elastic member, an elastic force of the elastic member, a shape of a part included in the movable part, and a shape of a component included in the movable part so that a residual value between a target position and an actual position of the optical system is not more than an allowable value. The blur correction unit according to claim 1, wherein at least one of arrangement positions of components included in the movable portion is adjusted.

The ratio of the natural frequency of the translational motion along the translational axis in the plane perpendicular to the optical axis of the movable part and the natural frequency of the rotational motion around the center of gravity of the movable part is the ratio of the natural frequency of the optical system. 3. The blur correction unit according to claim 1 , wherein a value that makes a residual between a target position and an actual position of the optical system equal to or less than an allowable value is taken .

The damping mechanism includes a magnet whose relative position is changed by a rotational movement around the center of gravity of the movable part and a closed circuit coil, and a damping force based on a current generated in the coil due to the change of the relative position. The blur correction unit according to claim 2, wherein the shake correction unit is a magnetic damper that acts on the magnetic field.

A lens barrel comprising the blur correction unit according to claim 1.

An optical apparatus comprising the blur correction unit according to claim 1.