Imaging device employing optical motion sensor as gyroscope
First Claim
1. A motion sensor configured to control compensation for movement of an imaging device receiving light representative of a selected scene on an image plane, the motion sensor comprising:
- an array of photoelements configured to acquire successive images of features of an environment within a field of view of the motion sensor;
including a first image of features and a second image of features acquired at a time interval after the first image, the first and second images including common features,a controller configured to receive and correlate the first and second images to detect movement of the imaging device about a first axis and a second axis during the time interval by detecting differences in locations of the common features relative to the array of photoelements, and to provide first and second compensation signals based on the correlation to control opto-mechanical adjustments to counter detected movement of the imaging device about the first axis and the second axis so as to maintain a substantially fixed relationship between the selected scene and the imaging plane; and
an objective lens to direct light to the array of photoelements;
wherein the array of photoelements and the objective lens of the motion sensor are configured to have an angular resolution that substantially matches the angular resolution of a camera image sensor and of a zoom lens of the imaging device when the zoom lens is in a telephoto position at which the zoom lens has its longest focal length.
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Accused Products
Abstract
A motion sensor configured to control compensation for movement of an imaging device receiving light representative of a selected scene on an image plane. The motion sensor includes and array of photoelements and a controller. The array of photoelements is configured to acquire successive images of features of an environment within a field of view of the motion sensor; including a first image of features and a second image of features acquired at a time interval after the first image, the first and second images including common features. The controller is configured to receive and correlate the first and second images to detect movement of the imaging device about a first and a second axis during the time interval by detecting differences in locations of the common features relative to the array of photoelements, and to provide first and second compensation signals based on the correlation to control opto-mechanical adjustments to counter detected movement of the imaging device about the first and second axes so as to maintain a substantially fixed relationship between the selected scene and the imaging plane.
67 Citations
16 Claims
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1. A motion sensor configured to control compensation for movement of an imaging device receiving light representative of a selected scene on an image plane, the motion sensor comprising:
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an array of photoelements configured to acquire successive images of features of an environment within a field of view of the motion sensor;
including a first image of features and a second image of features acquired at a time interval after the first image, the first and second images including common features,a controller configured to receive and correlate the first and second images to detect movement of the imaging device about a first axis and a second axis during the time interval by detecting differences in locations of the common features relative to the array of photoelements, and to provide first and second compensation signals based on the correlation to control opto-mechanical adjustments to counter detected movement of the imaging device about the first axis and the second axis so as to maintain a substantially fixed relationship between the selected scene and the imaging plane; and an objective lens to direct light to the array of photoelements; wherein the array of photoelements and the objective lens of the motion sensor are configured to have an angular resolution that substantially matches the angular resolution of a camera image sensor and of a zoom lens of the imaging device when the zoom lens is in a telephoto position at which the zoom lens has its longest focal length. - View Dependent Claims (2, 3, 4, 5)
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6. An imaging device comprising:
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a stage moveable along a first axis and a second axis; an imaging plane positioned on the stage and configured to receive light representative of a selected scene; and a motion sensor comprising; an array of photoelements positioned on the stage and configured to acquire successive images of features of an environment within a field of view of the motion sensor;
including a first image of features and a second image of features acquired at a time interval after the first image, the first and second images including common features, anda controller configured to receive and correlate the first and second images to detect movement of the imaging device about the first axis and the second axis during the time interval by detecting differences in locations of the common features relative to the array of photoelements, and to provide first and second compensation signals based on the correlation to control movement of the stage to counter detected movement of the imaging device about the first axis and the second axis so as to maintain a substantially fixed relationship between the selected scene and the imaging plane; a camera objective zoom lens associated with the imaging plane and a motion sensor objective lens associated with the motion sensor; wherein the motion sensor objective lens has a focal length such that an angular resolution of the array of photoelements of the motion sensor substantially matches an angular resolution of an image sensor of the imaging device when the camera objective zoom lens is in a telephoto position at which the camera objective zoom lens has its longest focal length. - View Dependent Claims (7, 8, 9, 10)
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11. A method of compensating for movement of an imaging device receiving light representative of a selected scene on an image plane, the method comprising:
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configuring an image sensor and an objective lens to have an angular resolution that substantially matches the angular resolution of a camera image sensor and zoom lens of the imaging device when the zoom lens has its longest focal length; acquiring successive images of features of an environment with the image sensor, including a first image of features and a second image of features acquired after at a time interval after the first image, the first and second image including common features; correlating the first and second images to detect movement of the imaging device about a first axis and a second axis by detecting differences in locations of the common features relative to the image sensor; controlling opto-mechanical adjustments based on the correlation to counter detected movement of the imaging device so as to maintain a substantially fixed relationship between the selected scene and the imaging plane. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification