US 11,962,904 B2Granted

Image blur correction device, imaging device, and lens device

AssigneeFUJIFILM Corporation

InventorsKouhei Awazu, Yasuhiro Miwa, Takuro Abe

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Abstract

A first image blur correction device includes an imaging-element holding-member to which an imaging-element is fixed, a housing that supports the imaging-element holding-member to be movable in a direction X perpendicular to an optical axis of a lens device, and a first drive mechanism that generates thrust of moving the imaging-element holding-member in the direction X. The first drive mechanism includes a first magnet that is fixed to the housing and in which a direction connecting both magnetic poles is parallel to the direction X, and a first coil that is fixed to the imaging-element holding-member to face the first magnet. In a state where the imaging-element holding-member is at a reference position where the optical axis of the lens device coincides with a center of the imaging-element, a position of a first magnet center in the direction X and a first coil central axis deviate from each other.

Claims10

Dependent claims

An image blur correction device that corrects blur of an image formed in an imaging element by an imaging optical system, the image blur correction device comprising:

a movable mechanism to which an optical component included in the imaging element or the imaging optical system is fixed;
a support mechanism that supports the movable mechanism to be movable in a first direction perpendicular to an optical axis of the imaging optical system;
and
a first drive mechanism that generates thrust of moving the movable mechanism in the first direction,
wherein the first drive mechanism includes a first magnetic force generator that is fixed to one mechanism of the support mechanism and the movable mechanism and in which a direction connecting both magnetic poles is parallel to the first direction, and a first coil that is fixed to the other mechanism of the support mechanism and the movable mechanism to face the first magnetic force generator,
in a state in which the movable mechanism is at a reference position where the optical axis of the imaging optical system coincides with a center of the imaging element, a position in the first direction of a center between both magnetic poles of the first magnetic force generator and a central axis of winding of the first coil deviate from each other,
the first coil is fixed at a position in the movable mechanism different from the imaging element or the optical component fixed to the movable mechanism in the first direction,
the first magnetic force generator is fixed to the support mechanism,
in a state in which the movable mechanism is at the reference position, the central axis of the winding of the first coil is positioned on a side of the imaging element or the optical component fixed to the movable mechanism with respect to the center between both magnetic poles of the first magnetic force generator, in the first direction, and
a position in the first direction of an end portion in the first magnetic force generator, on a side in a direction from the central axis of the winding of the first coil toward the center between both magnetic poles of the first magnetic force generator in the first direction, coincides with a position in the first direction of an end portion in a region through which a movable body consisting of a member fixed to the movable mechanism and the movable mechanism is capable of passing, on the side in the direction from the central axis of the winding of the first coil toward the center between both magnetic poles of the first magnetic force generator in the first direction.

7 more elements

An image blur correction device that corrects blur of an image formed in an imaging element by an imaging optical system, the image blur correction device comprising:

a movable mechanism to which an optical component included in the imaging element or the imaging optical system is fixed;
a support mechanism that supports the movable mechanism to be movable in a first direction perpendicular to an optical axis of the imaging optical system;
and
a first drive mechanism that generates thrust of moving the movable mechanism in the first direction,
wherein the first drive mechanism includes a first magnetic force generator that is fixed to one mechanism of the support mechanism and the movable mechanism and in which a direction connecting both magnetic poles is parallel to the first direction, and a first coil that is fixed to the other mechanism of the support mechanism and the movable mechanism to face the first magnetic force generator,
in a state in which the movable mechanism is at a reference position where the optical axis of the imaging optical system coincides with a center of the imaging element, a position in the first direction of a center between both magnetic poles of the first magnetic force generator and a central axis of winding of the first coil deviate from each other,
the first magnetic force generator is fixed at a position in the movable mechanism different from the imaging element or the optical component fixed to the movable mechanism in the first direction,
the first coil is fixed to the support mechanism,
in a state in which the movable mechanism is at the reference position, the center between both magnetic poles of the first magnetic force generator is positioned on the side of the imaging element or the optical component fixed to the movable mechanism from the central axis of the winding of the first coil in the first direction, and
a position in the first direction of an end portion in the first coil, on a side in a direction from the center between both magnetic poles of the first magnetic force generator toward the central axis of the winding of the first coil in the first direction, coincides with a position in the first direction of an end portion in a region through which a movable body consisting of the movable mechanism and a member fixed to the movable mechanism is capable of passing, on the side in the direction from the center between both magnetic poles of the first magnetic force generator toward the central axis of the winding of the first coil in the first direction.

7 more elements

An image blur correction device that corrects blur of an image formed in an imaging element by an imaging optical system, the image blur correction device comprising:

a movable mechanism to which an optical component included in the imaging element or the imaging optical system is fixed;
a support mechanism that supports the movable mechanism to be movable in a first direction perpendicular to an optical axis of the imaging optical system;
and
a first drive mechanism that generates thrust of moving the movable mechanism in the first direction,
wherein the first drive mechanism includes a first magnetic force generator that is fixed to one mechanism of the support mechanism and the movable mechanism and in which a direction connecting both magnetic poles is parallel to the first direction, and a first coil that is fixed to the other mechanism of the support mechanism and the movable mechanism to face the first magnetic force generator,
in a state in which the movable mechanism is at a reference position where the optical axis of the imaging optical system coincides with a center of the imaging element, a position in the first direction of a center between both magnetic poles of the first magnetic force generator and a central axis of winding of the first coil deviate from each other,
the support mechanism supports the movable mechanism to be movable in the first direction and a second direction perpendicular to the optical axis of the imaging optical system and the first direction,
the image blur correction device comprises:
a second drive mechanism that generates thrust of moving the movable mechanism in the second direction,
the second drive mechanism includes a second magnetic force generator that is fixed to one mechanism of the support mechanism and the movable mechanism and in which a direction connecting both magnetic poles is parallel to the second direction, and a second coil that is fixed to the other mechanism of the support mechanism and the movable mechanism to face the second magnetic force generator, and
in a state in which the movable mechanism is at the reference position, a position of a center between both magnetic poles of the second magnetic force generator in the second direction coincides with a central axis of winding of the second coil.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/479,488Filed 20 Sep 2021 · continuation
Priority: JP 2019-08450425 Apr 2019
Published: US 2022/0006958 A16 Jan 2022
Granted: 16 Apr 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

H04N 23/687
Performed by mechanical compensation: by shifting the lens or sensor position
G02B 7/021
For lenses: for more than one lens
G02B 27/646
Imaging systems using optical elements for stabilisation of the lateral and angular position of the image: compensating for small deviations, e.g.…
H04N 23/682
For stable pick-up of the scene, e.g. compensating for camera body vibrations: vibration or motion blur correction