COORDINATE MEASURING MACHINE FOR DETERMINING SPATIAL COORDINATES ON A MEASUREMENT OBJECT
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United States of America Patent
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Issued Date -
Feb 13, 2014
app pub date -
Aug 7, 2013
filing date -
Aug 7, 2012
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Abandoned
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Abstract
A coordinate measuring machine has a workpiece support for holding a measurement object, and a measuring head displaceable relative to the workpiece support. An evaluation and control unit determines geometric properties on the measurement object depending on the position of the measuring head relative to the workpiece support and on sensor data from an optical sensor carried on the measuring head. The optical sensor includes a camera and a lens assembly having a lens body, which forms a light-entry opening and a light-exit opening with an interface for connecting the camera. The lens assembly comprises a number of lens elements arranged in the lens body. A separate cover glass is arranged in the region of the light-entry opening, and sits in front of the lens elements as a first transparent component. Preferably, the lens elements are corrected depending on optical characteristics of the cover glass.
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