Position detector, camera-shake compensation mechanism, and image capture apparatus
First Claim
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1. A position detector comprising:
- a magnetic-sensor pair including magnetic sensors spaced from each other;
a magnetic force generator; and
a controller for detecting relative positions of said magnetic force generator and said magnetic-sensor pair based on respective output values of said magnetic sensors, wherein a length of said magnetic force generator along a first axis along which a first space between said magnetic sensors extends is equal to or larger than a length of said first space along said first axis.
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Abstract
A position detector includes a pair of magnetic sensors spaced from each other and a magnetic force generator movable relative to the pair of magnetic sensors. The length of the magnetic force generator along the space between the magnetic sensors is equal to or larger than a length of a space between the magnetic sensors. Preferably, the length of the magnetic force generator along the space between the magnetic sensors is equal to or larger than a sum of the length of the space between the magnetic sensors and an allowable moving distance of the magnetic force generator.
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Citations
17 Claims
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1. A position detector comprising:
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a magnetic-sensor pair including magnetic sensors spaced from each other;
a magnetic force generator; and
a controller for detecting relative positions of said magnetic force generator and said magnetic-sensor pair based on respective output values of said magnetic sensors, wherein a length of said magnetic force generator along a first axis along which a first space between said magnetic sensors extends is equal to or larger than a length of said first space along said first axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A camera-shake compensation mechanism comprising:
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a position detector for detecting relative positions of two objects which move relative to each other for compensating for camera shake; and
an actuator for actuating said two objects relative to each other based on results of detection carried out by said position detector, to compensate for said camera shake, wherein, said position detector includes;
a magnetic-sensor pair including magnetic sensors spaced from each other;
a magnetic force generator; and
a controller for detecting relative positions of said magnetic force generator and said magnetic-sensor pair based on respective output values of said magnetic sensors, wherein a length of said magnetic force generator along an axis along which a space between said magnetic sensors included in said magnetic-sensor pair extends is equal to or larger than a length of said space along said axis.
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15. An image capture apparatus comprising:
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a position detector for detecting relative positions of two objects which move relative to each other for compensating for camera shake, and an actuator for actuating said two objects relative to each other based on results of detection carried out by said position detector, to compensate for said camera shake, wherein, said position detector includes;
a magnetic-sensor pair including magnetic sensors spaced from each other;
a magnetic force generator; and
a controller for detecting relative positions of said magnetic force generator and said magnetic-sensor pair based on respective output values of said magnetic sensors, wherein a length of said magnetic force generator along an axis along which a space between said magnetic sensors extends is equal to or larger than a length of said space along said axis.
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16. An image capture apparatus comprising:
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an image-capture optical system including a focusing lens;
a position detector;
a lens-position controller for detecting a position of said focusing lens using said position detector, to control said position of said focusing lens, wherein said position detector includes;
a magnetic-sensor pair including magnetic sensors spaced from each other;
a magnetic force generator; and
a controller for detecting relative positions of said magnetic force generator and said magnetic-sensor pair based on respective output values of said magnetic sensors, wherein a length of said magnetic force generator along an axis along which a space between said magnetic sensors extends is equal to or larger than a length of said space along said axis.
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17. An image capture apparatus comprising:
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an image-capture optical system including a zoom lens;
a position detector;
a lens-position controller for detecting a position of said zoom lens using said position detector, to control said position of said zoom lens, wherein said position detector includes;
a magnetic-sensor pair including magnetic sensors spaced from each other;
a magnetic force generator; and
a controller for detecting relative positions of said magnetic force generator and said magnetic-sensor pair based on respective output values of said magnetic sensors, wherein a length of said magnetic force generator along an axis along which a space between said magnetic sensors extends is equal to or larger than a length of said space along said axis.
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Specification