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Theory of operation
Z-Trak2 3D Profiler Sensors
Figure 6. The various terms used in this document (defined below) are depicted here, seen in the XZ-plane.
The Y-axis is perpendicular to the page. Note that the diagram is not to scale.
X-Axis
The X-axis is the lateral axis that runs along the laser line emitted by the profiler.
Z-Axis
The Z-axis is the vertical axis where height measurements are made. It is perpendicular to the
XY-plane. Measurements can be made on only a portion of the Z-axis, called the Z range.
Y-Axis
The Y-axis is the axis of the scan or travel direction.
Standoff distance
The standoff distance (also known as the clearance distance) is the minimum distance from the
profiler's laser exit window where measurements can be made. This distance is model dependent
and cannot be changed by users. Any measured point located between the profiler and the standoff
distance will return an invalid code.