Method of calibrating a detector and calibration sphere for the same
First Claim
Patent Images
1. A method of calibrating a detector, comprising:
- providing a calibration object having an indicium and an axis of rotation;
making an image of the indicium with a detector;
comparing the image with a predetermined image; and
adjusting the detector so that a subsequent image of the indicium more-closely matches the predetermined image.
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Abstract
A method of calibrating a detector using a calibration object having a rounded surface and indicia is disclosed. The calibration object, when coupled with a detector and analyzer, assists in minimizing image distortion caused by misalignment of the detector relative to the calibration object. A calibration object is also disclosed.
32 Citations
34 Claims
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1. A method of calibrating a detector, comprising:
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providing a calibration object having an indicium and an axis of rotation;
making an image of the indicium with a detector;
comparing the image with a predetermined image; and
adjusting the detector so that a subsequent image of the indicium more-closely matches the predetermined image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. The method of claim 17 wherein the at least two indicia are two lines of latitude that define planes perpendicular to the axis of rotation.
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18. A method for calibrating a detector, comprising:
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positioning a calibration sphere at a position on a golf ball production line occupied by a golf ball during golf ball inspection;
imaging the calibration object using a line scan camera detector to produce an image;
comparing the image with an predetermined image; and
adjusting the detector. - View Dependent Claims (19, 20, 21, 22)
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23. A calibration object, comprising:
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an axis of rotation;
first indicium that designates the axis of rotation wherein the first indicium, when detected by a detector, indicates whether the detector is parallel to the axis of rotation;
second indicium that designates a plane that contains the axis of rotation wherein the second indicium, when detected by a detector, indicates whether the detector is in front of the axis of rotation; and
at least two indicia having a known distance apart from each other that, when detected by a detector, indicate a scale factor that relates a detected distance to the known distance. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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31. A method for calibrating an image of a calibration object rotatable by a device comprising the steps of:
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rotating the calibration object with the device;
providing at least two indicia that make a first angle with each other;
obtaining a digital image of the calibration object;
determining a second angle between the corresponding indicia on the image;
determining an adjustment factor from the first and second angle;
applying said adjustment factor to images of other objects rotated by said device. - View Dependent Claims (32, 33, 34)
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Specification