The laser profilometer based on the Michelson interferometry principle
has its platform driven by a stepper motor for fast rough position and expansion of measuring range
and by piezoelectric ceramic for precision positioning with a repetitive positioning accuracy of 10 nm. A common path interference system
which is not sensitive to mechanical vibration and temperature drift
is used in the measuring optical path. The laser profilometer has a measuring range of 20 mm×20 mm×0.4 mm
a longitudinal resolution of 0.32 μm
and a lateral resolution of 0.5 μm.
关键词
Keywords
references
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