Image blur correcting device, lens device, and imaging device

Patent metadata

Field	Value
Publication number	US-11830169-B2
Application number	US-202117221161-A
Country	US
Kind code	B2
Filing date	Apr 2, 2021
Priority date	Nov 21, 2018
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

Provided are an image blur correcting device that capable of improving a degree of freedom in design and realizing miniaturization or weight reduction, a lens device including the image blur correcting device, and an imaging device including the lens device. An image blur correcting device includes a fixing member, a first movable member that is supported by the fixing member in a state of being movable in a direction X, and a second movable member that is supported by the first movable member in a state of being movable in a direction Y A second coil that drives the second movable member is fixed to one first surface of the second movable member in a direction Z, and a first coil that drives the first movable member is fixed to the other second surface of the second movable member in the direction Z.

First claim

What is claimed is:

1. An image blur correcting device that corrects a blur of a captured image captured by an imaging element that images a subject through an imaging optical system, the device comprising:
a fixing member;
a first movable member that is supported by the fixing member in a state of being movable in a first direction;
a second movable member that is supported by the first movable member in a state of being movable in a second direction intersecting the first direction;
a correction lens that is included in the imaging element fixed to the second movable member or the imaging optical system fixed to the second movable member;
a first coil and a first magnet that generate a propulsive force for moving the first movable member in the first direction; and
a second coil and a second magnet that generate a propulsive force for moving the second movable member in the second direction,
wherein, of the first movable member and the second movable member, a movable member that is relatively far from the fixing member in a third direction perpendicular to the first direction and the second direction is defined as a distant movable member, and a movable member that is relatively close to the fixing member is defined as a near movable member,
the first coil or the first magnet is defined as a first drive element, and the second coil or the second magnet is defined as a second drive element,
in the third direction, a surface of the distant movable member or the near movable member on an opposite side to a fixing member side is defined as a first surface of the distant movable member or the near movable member,
in the third direction, a surface of the distant movable member or the near movable member on the fixing member side is defined as a second surface of the distant movable member or the near movable member,
one of the first drive element and the second drive element is provided on the distant movable member or the near movable member to be closer to the fixing member side than the first surface, and
the other of the first drive element and the second drive element is provided on the distant movable member or the near movable member to be closer to the opposite side to the fixing member side than the second surface.

2. The image blur correcting device according to claim 1 , wherein the first drive element and the second drive element are each fixed to the distant movable member or the near movable member.

3. The image blur correcting device according to claim 2 , wherein the one of the first drive element and the second drive element has a portion that protrudes from the second surface of the distant movable member or the near movable member.

4. The image blur correcting device according to claim 2 , wherein the other of the first drive element and the second drive element has a portion that protrudes from the first surface of the distant movable member or the near movable member.

5. The image blur correcting device according to claim 2 , further comprising a facing fixing member that faces the fixing member with the distant movable member and the near movable member interposed therebetween,
wherein the first coil and the second coil are fixed to the distant movable member or the near movable member,
the first magnet is fixed to the fixing member or the facing fixing member at a position facing the first coil, and
the second magnet is fixed to the facing fixing member or the fixing member at a position facing the second coil.

6. The image blur correcting device according to claim 1 ,
wherein one of the first drive element and the second drive element is fixed to the near movable member, and is provided on the near movable member to be closer to the fixing member side than the first surface, and
the other of the first drive element and the second drive element is fixed to the distant movable member, and is provided on the distant movable member to be closer to the opposite side to the fixing member side than the second surface.

7. The image blur correcting device according to claim 6 , wherein the one of the first drive element and the second drive element has a portion that protrudes from the second surface of the near movable member.

8. The image blur correcting device according to claim 6 , wherein the other of the first drive element and the second drive element has a portion that protrudes from the first surface of the distant movable member.

9. The image blur correcting device according to claim 6 ,
wherein a guide member that guides movement of the distant movable member or the near movable member is fixed to the first surface of the near movable member or the second surface of the distant movable member, and
a part of the guide member and the first drive element overlap each other as viewed in the third direction.

10. The image blur correcting device according to claim 6 ,
wherein two first guide members that guide movement of the first movable member in the first direction and extend in the first direction are fixed to the fixing member, and
one of the two first guide members and the second drive element are arranged in the first direction as viewed in the third direction.

11. The image blur correcting device according to claim 10 ,
wherein the first coil is fixed to the near movable member,
the second coil is fixed to the distant movable member,
the first magnet is fixed to the fixing member at a position facing the first coil, and
the second magnet is fixed at a position facing the second coil on an opposite side to a near movable member side.

12. The image blur correcting device according to claim 11 ,
wherein a yoke that prevents a magnetic flux leakage of the second magnet is fixed to a back surface of the second coil of the distant movable member, or the first surface of the near movable member at a position facing the second coil.

13. The image blur correcting device according to claim 10 ,
wherein the second coil is fixed to the near movable member,
the first coil is fixed to the distant movable member,
the second magnet is fixed to the fixing member at a position facing the second coil, and
the first magnet is fixed at a position facing the first coil on an opposite side to a near movable member side.

14. The image blur correcting device according to claim 13 ,
wherein a yoke that prevents a magnetic flux leakage of the second magnet is fixed to a back surface of the second coil of the near movable member, or the second surface of the distant movable member at a position facing the second coil.

15. An image blur correcting device that corrects a blur of a captured image captured by an imaging element that images a subject through an imaging optical system, the device comprising:
a fixing member;
a first movable member that is supported by the fixing member in a state of being movable in a first direction;
a second movable member that is supported by the first movable member in a state of being movable in a second direction intersecting the first direction and is disposed to be closer to an opposite side to a fixing member side than the first movable member in a third direction perpendicular to the first direction and the second direction;
a correction lens that is included in the imaging element fixed to the second movable member or the imaging optical system fixed to the second movable member;
a first coil and a first magnet that generate a propulsive force for moving the first movable member in the first direction; and
a second coil and a second magnet that generate a propulsive force for moving the second movable member in the second directio

Assignees

• Fujifilm Corp

Inventors

• KAMIO Keito
• Okamori Kazuaki
• Fujiki Shinichiro
• Nagami Ryosuke

Classifications

• G06T5/003 Primary

  Physics · mapped topic

• H04N23/683

  performed by a processor, e.g. controlling the readout of an image memory · CPC title

• H04N23/687

  by shifting the lens or sensor position · CPC title

• G06T2207/20201

  Motion blur correction · CPC title

• H04N23/55 Primary

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title