Measurement of form of spherical and near-spherical optical surfaces
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United States of America Patent
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Nov 28, 2006
Grant Date -
Oct 27, 2005
app pub date -
Apr 23, 2004
filing date -
Apr 23, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Rotational motions between a displacement-measuring probe and an optical test surface define a spherical or near spherical datum surface against which measurements of the probe are taken. The probe has a measurement axis that is maintained substantially normal to the optical test surface during the course of measurement.
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