Blur correction apparatus
AssigneeOlympus Corporation
InventorsKazunori Yuge, Masaya Ota, Yoshiaki Sueoka
Life of this patent
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Abstract
A blur correction apparatus includes a first fixing member, a moveable member and a second fixing member. A coil for generating a magnetic flux is arranged on the first fixing member. The movable member includes (1) a first magnet facing the coil, (2) a second magnet arranged adjacent to the first magnet, such that the first magnet is arranged between the second magnet and the coil arranged in the first fixing member, and (3) an optical element. The movable member can move in a direction perpendicular to an optical axis of the optical element relative to the first fixing member. The second fixing member includes a hall element that is arranged adjacent to the second magnet in the movable member.
Claims20
A blur correction apparatus comprising:
- a) a first fixing member on which a coil for generating a magnetic flux is arranged;
- b) a movable member including
- 1) a first magnet facing the coil,
- 2) a second magnet arranged adjacent to the first magnet, such that the first magnet is arranged between the second magnet and the coil arranged in the first fixing member, and
- 3) an optical element,
- wherein the movable member can move in a direction perpendicular to an optical axis of the optical element relative to the first fixing member;
- and
- c) a second fixing member including a hall element that is arranged adjacent to the second magnet in the movable member,
- wherein the first magnet and the second magnet are positioned on the moveable member such that they strengthen magnetic forces in each other.
A blur correction apparatus comprising:
- a) a first fixing member on which a coil for generating a magnetic flux is arranged;
- b) a movable member including
- 1) a first magnet facing the coil,
- 2) a second magnet arranged adjacent to the first magnet, such that the first magnet is arranged between the second magnet and the coil arranged in the first fixing member, and
- 3) an optical element,
- wherein the movable member can move in a direction perpendicular to an optical axis of the optical element relative to the first fixing member;
- and
- c) a second fixing member including a hall element that is arranged adjacent to the second magnet in the movable member,
- wherein a magnetic force of the second magnet is weaker than that of the first magnet.
A blur correction apparatus comprising:
- a) a first fixing member on which a coil for generating a magnetic flux is arranged;
- b) a movable member including
- 1) a first magnet facing the coil,
- 2) a second magnet arranged adjacent to the first magnet, such that the first magnet is arranged between the second magnet and the coil arranged in the first fixing member, and
- 3) an optical element,
- wherein the movable member can move in a direction perpendicular to an optical axis of the optical element relative to the first fixing member;
- and
- c) a second fixing member including a hall element that is arranged adjacent to the second magnet in the movable member,
- wherein the first magnet and the second magnet are spaced apart at a distance at which (1) the second magnet contributes to a driving force generated due to magnetic flux provided from the coil and (2) accuracy of position detection by the hall element is not affected by the magnetic flux.
Apparatus comprising:
- a) a first member including a coil for generating magnetic flux;
- b) a second member including a hall element for detecting magnetic flux;
- c) a third member moveable relative to the first and second members, and including
- 1) an optical element,
- 2) a first magnet facing the coil, and
- 3) a second magnet arranged adjacent to the first magnet, such that the first magnet is arranged between the second magnet and the coil, and such that the second magnet is arranged between the first magnet and the hall element;
- and
- d) a blur correction controller adapted to
- 1) receive a first input indicative of blur due to shaking,
- 2) receive a second input indicative of magnetic flux detected by the hall element,
- 3) determine a blur correction value based on the first and second inputs received, and
- 4) provide an output, based on the determined blur correction value, to induce providing a controlled current through the coil,
- wherein, responsive to current flowing through the coil, the first and second magnets cause the third member to move relative to the first member in a direction perpendicular to an optical axis of the optical element, and
- wherein the second magnet is smaller and weaker than the first magnet.
Dependencies are inferred from the claim text.