IMAGE SHAKE CORRECTION DEVICE FOR OPTICAL APPARATUS AND OPTICAL APPARATUS HAVING IMAGE SHAKE CORRECTION DEVICE
First Claim
Patent Images
1. An image shake correction device of an optical apparatus comprising:
- an optical element provided in the optical path of the principal optical system, including a pair of flat plates being made of transparent material corresponding to the incident surface and outgoing surface and transparent fluid filler filled between said pair of flat plates; and
a driving mechanism, having an actuator which utilizes shape memory alloy functioning to change the angle of at least one of said pair of flat plates with respect to an optical axis of a principal optical system of the optical apparatus.
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Abstract
An image shake correction device for correcting image shake on the focal plane of an optical apparatus due to vibration of the optical apparatus such as a camera. A correction optical element is provided in the optical path of the principal optical system, the correction optical element is driven correspondingly to the detected image shake magnitude, and the image shake on the focal plane of an optical apparatus is corrected. A driving mechanism which utilizes shape memory alloy is used for driving a correction lens for correcting image shake.
32 Citations
25 Claims
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1. An image shake correction device of an optical apparatus comprising:
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an optical element provided in the optical path of the principal optical system, including a pair of flat plates being made of transparent material corresponding to the incident surface and outgoing surface and transparent fluid filler filled between said pair of flat plates; and
a driving mechanism, having an actuator which utilizes shape memory alloy functioning to change the angle of at least one of said pair of flat plates with respect to an optical axis of a principal optical system of the optical apparatus. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An image shake correction device of an optical apparatus comprising:
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a correction optical system provided in the optical path of the principal optical system;
a holder being provided movably in the plane approximately perpendicular to the optical axis of the principal optical system for holding said correction optical system; and
a first driving mechanism having an actuator which utilizes shape memory alloy to move said holder and functions to move said holder in the plane approximately perpendicular to the optical axis of the principal optical system in the first direction. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. An image shake correction device of an optical apparatus comprising:
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a correction optical system provided in the optical path of the principal optical system;
a holder for supporting said correction optical system;
a first driving mechanism having an actuator which utilizes shape memory alloy to move said holder and incline said holder around the first axis in a plane approximately perpendicular to the optical axis of the principal optical system; and
a second driving mechanism having an actuator to move said holder and incline said holder around the second axis, which is different from the first axis, in a plane approximately perpendicular to the optical axis of the principal optical system. - View Dependent Claims (17, 18, 19, 20)
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21. An optical apparatus provided with an image shake correction device comprising:
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a first optical system for taking in an optical image from an object;
a second optical system for correcting the shake, due to the shake of said optical apparatus, of the optical image taken from said first optical system; and
a driving mechanism having an actuator which utilizes shape memory alloy for driving said second optical system based on the shape change of shape memory alloy. - View Dependent Claims (22, 23, 24)
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25. A method for correcting the image shake in an optical apparatus provided with an image shake correction system comprising the steps of:
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(1) detecting the shake magnitude caused in the optical apparatus;
(2) calculating the magnitude of displacement of the correction optical system based on the detected shake magnitude of the optical apparatus; and
(3) heating the actuator including shape memory alloy which is a component of the driving mechanism for driving the correction optical system to a temperature determined based on said calculation result.
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Specification