OPTICAL MEASUREMENT OF LEAD ANGLE OF GROOVE IN MANUFACTURED PART
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United States of America Patent
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Issued Date -
May 3, 2012
app pub date -
Oct 29, 2010
filing date -
Oct 29, 2010
priority date (Note) -
Abandoned
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Abstract
A portion of the surface of a cylindrical part with a machined groove is mapped with an optical profilometer and the height map is fitted to a virtual cylindrical configuration that best fits the data. Two-dimensional Fourier Transfer analysis of the map data is advantageously used to find the orientation of the groove on the part. The orientation of the groove is then compared to the longitudinal axis of such virtual cylinder to calculate the groove's lead angle.
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