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C5 Series User Manual Rev. 1.4
The Advanced AOI Functions
The C5 series features an area CMOS sensor, whose frame rate depends on the number
of pixels to readout. By defining a sensor Area of Interest (AOI) the frame rate and hence
the profile speed will be significantly increased due to the smaller number of pixels to
readout.
In some cases the AOI position may not be constant and it should follow the image of
laser line on the camera sensor. The C5 series features functions for performing an
automatic AOI positioning (AOI-Search) as well as line tracking (AOI-Tracking).
AOI-Search
The AOI-Search mode can be used in 2D mode as well as in 3D mode and has the benefit
to adjust the AOI at the start of the acquisition to the optimal position of the laser line. In
that case the laser line is automatically centered to the AOI.
The user must only define the minimum required AOI Height (number of required sensor
rows) for the expected laser line and afterwards the camera will adjust the vertical AOI-
Offset (AoiOffsetY) value to the best position.
AOI-Tracking
The automatic AOI-Tracking is the dynamic version of the static AOI-Search mode. While
the AOI-Search is only working at the beginning of each 3D acquisition, the AOI-Tracking
mode is working continuously during 3D image acquisition.
Thus 3D profile acquisition with AOI-Tracking is able to cover the complete image/sensor
size although the defined AOI size could be much smaller. This is very useful in case of
applications involving continuous profile measurements with variable distances to the
surface.
A detailed description of these functions can be found in a separate
application note.
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