SVS-Vistek eco4050, Руководство пользователя

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SVS-VISTEK
Feature-Set 41
Figure 20: Rolling shutter lines light sensitivity versus time
As shown here, after triggering only part of the sensor is sensitive to light
(scanning time). As soon as scanning time has finished, all pixels are
sensitive to light, the sensor is fully open. While being fully open this is the
time where flashing should happen. In the final scanning time, less and
less pixels are sensitive to light until the sensor light sensitivity will finish.
Flashing of rolling shutter sensors is significantly different to global shutter
flashing!
Rolling Shutter Limitations
Due to the principles of rolling shutter, some standard features of SVS-
Vistek cameras are not applicable. This relates to following
Exposure Control with Rolling Shutter
In the graphics above, it is easy to see that external exposure control does
not make sense with rolling shutter. Exposure delay and Overlapping
Exposure as well is impossible with rolling shutter.
ROI with Rolling shutter
With Rolling shutter the whole sensor has to be read out – always. That
means applying ROI will reduce the amount of final data being
transmitted out of the camera (and the framerate might rise, due to the
limited bandwidth of the interface). Nonetheless, the maximum achievable
framerate with applied ROI will be the maximum framerate of the sensor
reading the full sensor area (internal full sensor speed), please refer to the
relating sensor specs.