Sigma LBA-400 Manuel D’Utilisation
this period exceeds 3 seconds then the Video sync enunciator may turn RED. Under this
condition this signal can be ignored. The next frame should be captured when the next trigger
pulse triggers the camera.
5.4.1.5 Digital Camera Gain and Black Level Control
Most digital cameras have programmable gain and black levels. These settings often have
default values that are not optimum for laser beam analysis. Usually the gain is too high and the
black level is too low. The gain is set high because most camera makers want to achieve good
picture taking sensitivity. The black level is set low to increase dynamic range.
For laser analysis the best gain setting is the lowest value that just allows the digital output to
For laser analysis the best gain setting is the lowest value that just allows the digital output to
reach all ones, but before the camera imager goes non-linear.
The black level should be set just high enough to insure the absence of any zero pixels when the
The black level should be set just high enough to insure the absence of any zero pixels when the
imager is dark.
Be sure to allow a little headroom on both of these settings because they will drift as the camera
warms up.
Be sure to allow a little headroom on both of these settings because they will drift as the camera
warms up.
Operator’s Manual
LBA-PC
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