Basler scout GigE, Руководство пользователя

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Image Acquisition Control AW00011916000
126 Basler scout GigE
This situation is illustrated below for rising edge triggering.
Fig. 49: Overtriggering with Timed Exposure
For more information about the Frame Start Overtrigger event, see Section 12.15 on page 310 .
For more information about the camera’s exposure time parameters, see Section 9.7 on page 141 .
Trigger Width Exposure Mode
When trigger width exposure mode is selected, the length of the exposure for each frame
acquisition will be directly controlled by the ExFSTrig signal. If the camera is set for rising edge
triggering, the exposure time begins when the ExFSTrig signal rises and continues until the
ExFSTrig signal falls. If the camera is set for falling edge triggering, the exposure time begins when
the ExFSTrig signal falls and continues until the ExFSTrig signal rises. Figure 50 illustrates trigger
width exposure with the camera set for rising edge triggering.
Trigger width exposure is especially useful if you intend to vary the length of the exposure time for
each captured frame.
Fig. 50: Trigger Width Exposure with Rising Edge Triggering
When you operate the camera in trigger width exposure mode, you must also use the camera’s
exposure time prameters to set an exposure time. This parameter setting will be used by the
camera to operate the Trigger Ready signal.
You should adjust the exposure setting to represent the shortest exposure time you intend to use.
For example, assume that you will be using trigger width exposure mode and that you intend to use
the ExFSTrig signal to vary the exposure time in a range from 3000 µs to 5500 µs. In this case you
would use the exposure setting to set the exposure time to 3000 µs.
For more information about the Trigger Ready signal, see Section 9.11.3 on page 157 and
Section 9.11.4 on page 159 .
For more information about the camera’s exposure time parameters, see Section 9.7 on page 141 .
This rise in the trigger signal will be
ignored, and a Frame Start Overtrigger
event will be generated
Exposure
(duration determined by the
exposure time parameters)
ExFSTrig Signal
ExFSTrig Signal Period
ExFSTrig Signal
Exposure