Basler Pioneer User Manual page 132

Image Acquisition Control
expect exposure to take place only when the ExTrig signal is high. But since the signal falls while
the previous frame is still reading out, the camera automatically extends exposure until the readout
is complete. On the second cycle of the ExTrig signal shown in the figure, the signal rises during
previous frame readout, but falls after the readout is complete. This is a normal situation and
exposure would be determined by the high time of the ExTrig signal as you would expect.
TrigRdy
Signal
ExTrig Signal
Frame Readout
Fig. 35: Overlapped Level Control Exposure
You can set the exposure time parameter value and select an exposure mode from within your
application software by using the pylon API. The following code snippets illustrate using the API to
set the exposure time parameter and select the exposure mode:
// set for the timed exposure mode, set exposure time to 3000 µs
Camera.ExposureMode.SetValue( ExposureMode_Timed );
Camera.ExposureTimeAbs.SetValue( 3000 );
// set for the width exposure mode, set minimum exposure time to 3000 µs
Camera.ExposureMode.SetValue( ExposureMode_TriggerWidth );
Camera.ExposureTimeAbs.SetValue( 3000 );
For detailed information about using the pylon API, refer to the Basler pylon Programmer's Guide
and API Reference.
You can also use the Basler pylon Viewer application to easily set the parameters.
For more information about the pylon viewer, see Section 2.2 on
page 40.
For more information about the camera's exposure time parameter, see Section 10.4 on
For more information about overlapped exposure, see Section 10.5 on
122
Exposure
Frame N-1
Exposure
Frame N
page 20 and Section 2.4 on
page
page 127.
130.
Basler pioneer