Method and apparatus for calibrating glare-shielding glasses
First Claim
Patent Images
1. A method for calibrating a glare-shield comprising:
- measuring, using the glare shield, at least two relationships between a glare source and a glare calibration position at about the center of a user'"'"'s eye, wherein measuring each relationship includes determining a relationship between the glare source, a darkened region on the glare-shield, and the calibration position, and concurrently recording the position of the glare source on a photodetector associated with the glare-shield to produce a calibration data point;
based upon the measured relationships, determining the location of a darkened spot on the glare shield in response to a location of glare on a glare sensor; and
tracking the position of a pupil with a pupil tracking device, wherein the measured relationships are adjusted according to the position of the pupil.
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Abstract
The present invention is directed to a method and apparatus for assuring that dynamic glare-shielding devices are properly characterized for the optical arrangement of a particular user by using a plurality of calibration points, thereby assuring the maximum effectiveness of such devices.
27 Citations
19 Claims
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1. A method for calibrating a glare-shield comprising:
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measuring, using the glare shield, at least two relationships between a glare source and a glare calibration position at about the center of a user'"'"'s eye, wherein measuring each relationship includes determining a relationship between the glare source, a darkened region on the glare-shield, and the calibration position, and concurrently recording the position of the glare source on a photodetector associated with the glare-shield to produce a calibration data point; based upon the measured relationships, determining the location of a darkened spot on the glare shield in response to a location of glare on a glare sensor; and tracking the position of a pupil with a pupil tracking device, wherein the measured relationships are adjusted according to the position of the pupil.
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2. A method for calibrating a glare-shield comprising:
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measuring, using the glare shield, at least two relationships between a glare source and a glare calibration position, said glare calibration position located at about the center of a user'"'"'s eyeball, wherein measuring each relationship includes determining a relationship between the glare source, a darkened region on the glare-shield, and the calibration position, and concurrently recording the position of the glare source on a photodetector associated with the glare-shield to produce a calibration data point, wherein recording the position of the glare source on a photodetector associated with the glare-shield includes recording a spread in pixel positions excited by the glare source, further comprising testing the validity of the calibration measurements by comparing the spread in pixel positions to a maximum allowable; and based upon the measured relationships, determining the location of a darkened spot on the glare shield in response to a location of glare on a glare sensor. - View Dependent Claims (3)
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4. A method for calibrating a glare-shield comprising:
measuring at least two relationships between a glare source and a glare calibration position;
said glare calibration position located at about the center of a user'"'"'s eyeball behind a pupil, includingdetermining a first relationship between the glare source, a first darkened region on the glare-shield, and the glare calibration position, concurrently recording the first position of the glare source on a photodetector associated with the glare-shield to produce a first calibration data point, determining a second relationship between the glare source, a second darkened region on the glare-shield, and the glare calibration position, and concurrently recording the second position of the glare source on the photodetector associated with the glare-shield to produce a second calibration data point; and using the measured relationships, determining the location of a darkened spot on the glare shield in response to a specific location of glare on a glare sensor. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for the calibration of a glare-shield, comprising:
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at least one glare source; a darkened region on the glare-shield; a calibration position, said calibration position approximating the center of a user'"'"'s eyeball, for concurrently perceiving the glare source and the darkened region and adjusting the location of the darkened region relative to the glare source; a microcontroller for determining at least a first and a second relationship between the location of the glare source, the darkened region on the glare-shield, and the calibration position; memory, associated with said microcontroller, for recording first and second calibration data points for corresponding positions of the glare source on a photodetector associated with the glare-shield when, as viewed by the user'"'"'s eye, the darkened region occludes the glare source, where the photodetector includes a sensor array of light-sensitive pixels located behind a pinhole aperture, such that the glare source position is indicated by pixels of the sensor array most strongly illuminated by the glare source; and said microcontroller further determining, based upon the first and second calibration data points, a position of the darkened region in response to the glare source location on the photodetector. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification