Gentec-EO Beamage-M2 - Manual (Page 34)

Beamage-M 2 User Manual Revision 2.0 34
Figure 3-29 M 2 Beams with multiple exposure time
The counterpart of the multiple exposure times is the refresh rate of the M
2
images. If we need to change the
exposure time for each beam, we need to grab a frame of each beam. The refresh rate of the M2 will depend on
the frame rate of the software and the number of beams detected by the sensor in the following way:
To keep the software responsive, multi automatic exposure detection has been implemented and it is active
only when needed. It will be activated automatically when measuring in real-time, only in specific parts of the
calibration procedure after the calibration. Every time the software will need to measure in the M
2 mode, it will
switch to the multiple automatic exposures time detection algorithms.
This mode can also be activated and deactivated manually in the M
2
Beam panel. When this mode is activated,
all the beams on the sensor will be listed in this panel. This list will be refreshed at the M 2
fps
rate.
Each beam has a specific exposure time, but we can only show one image at a time in the 2D and 3D displays. To
see a specific beam with its specific exposure time in the 2D or 3D display, select the desired beam in the list.
Occasionally, a beam has a negative impact on the measurement of the M2 because its intensity is too low or
because it has a reflection that has an impact on the diameter. In that case, the region of interest (ROI) around
that beam must be modified or else the beam needs to be rejected. Another mode exists in order to make these
corrections, the multiple manual active areas. When activating this mode, the multiple regions of interest will be
fixed and not automatically detected at each frame. These regions of interest will be based on the last automatic
detection and will be listed in the M
2 Beams panel.