Calibration Artifact and Method of Calibrating a Coordinate Measuring Machine
AssigneeHexagon Metrology, Inc.
InventorPeter Hicks
Life of this patent
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Abstract
A first artifact for use in calibrating a machine-vision coordinate measurement machine includes a body with two targets at opposing ends of the body. The targets are separated by a fixed distance, and are visible to and recognizable by a camera in the coordinate measurement machine. The machine is configured to sequentially move the camera to locations above each target, and record each such camera position. As such, the artifact is useful in assessing the accuracy and calibration of the machine.
Claims16
A calibration artifact for calibrating an optical coordinate measuring machine, the coordinate measuring machine having an object table defining a table plane and an object volume extending from the table plane, and a movable camera, the calibration artifact comprising:
- a base having base length, and a surface defining a base plane;
- a first optically visible target coupled to the base and disposed in a first plane, the first plane parallel to the base plane;
- and
- a second optically visible target and coupled the base, the second target:
- separated from the first target by a nominal distance along the base length, and
- the second target disposed in a second plane, the second plane parallel to the first plane,
- the first target and the second target configured to define two calibration reference points visible to and locatable by the camera when the base rests on the table.
Dependencies are inferred from the claim text.