Method and apparatus for calibration of an electronic vision device
First Claim
1. A method of adaptively calibrating an electronic vision device to selected alignment with at least one eye of a user, said method comprising the steps ofsensing the relative directional location of a object in the field of view of the user and producing directional signals in response thereto, producing, on an addressable lens element positioned in the field of view of the user and in response to the directional signals, a visual marker at a location having initial coordinates to place the marker in selected visual alignment with the object, for an assumed position of the user'"'"'s eye relative to the lens element, moving the field of view of the user and the lens element together, to bring the marker into a selected alignment with the distant object for the actual position of the user'"'"'s eye relative to the lens element, and determining updated coordinates responsive to placement of the visual marker relative to the actual position of the user'"'"'s eye.
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Abstract
A method for calibrating an electronic vision device, such as a personal glare reduction device, having a darkened spot in its field of view includes the steps of fixing the lens coordinates of the darkened spot to correspond to a calibration site in the field of view, and moving the glare reduction device to place the darkened spot in line with the glare source. A processor evaluates a correction angle on the basis of the new direction to the glare source, as measured by a directional light sensor on the glare reduction device. The apparatus of the invention includes a controller that includes the processor, a memory, a light sensor, and a user interface element.
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Citations
18 Claims
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1. A method of adaptively calibrating an electronic vision device to selected alignment with at least one eye of a user, said method comprising the steps of
sensing the relative directional location of a object in the field of view of the user and producing directional signals in response thereto, producing, on an addressable lens element positioned in the field of view of the user and in response to the directional signals, a visual marker at a location having initial coordinates to place the marker in selected visual alignment with the object, for an assumed position of the user'"'"'s eye relative to the lens element, moving the field of view of the user and the lens element together, to bring the marker into a selected alignment with the distant object for the actual position of the user'"'"'s eye relative to the lens element, and determining updated coordinates responsive to placement of the visual marker relative to the actual position of the user'"'"'s eye.
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14. Apparatus for adaptively calibrating an electronic vision device to selective alignment with at least one eye of a user, said apparatus comprising
a lens element adapted for producing thereon a visual marker at an addressable location, a direction sensor mounted with said lens element and producing directional signals in response to sensing the relative directional location of a detectable distant object in the field of view of the user through the lens element, a lens controller having a first operating condition in which it is responsive to directional signals to produce on said lens element a visual marker at a location having initial coordinates that place the marker in selected visual alignment with the distant object, for an assumed position of the user'"'"'s eye relative to the lens element, and having a second operating condition in which it maintains said visual marker on the lens element in said location and responds to further directional signals for determining updated coordinates in response to the spatial displacement of the visual marker to attain a selected alignment of the marker relative to the distant object, for the actual position of the user'"'"'s eye relative to the lens element.
Specification