Balluff MATRIX VISION mvBlueNAOS, Техническое руководство

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1.18.4.1 Controlling strobe or flash at the outputs
Of course, MATRIX VISION devices support strobe or flash lights. However, there are several things you have to
keep in mind when using strobes or flash:
1. Be sure that the illumination fits with the movement of the device under test.
2. Bright illumination and careful control of exposure time are usually required.
3. To compensate blur in the image, short exposure times are needed.
Alternatively, you can use flash with short burn times. For this, you can control the flash using the camera. The
following figures show, how you can do this using
wxPropView (p. 65 )
1. Select in "Setting -
>
Base -
>
Camera -
>
Digital I/O Control" the output line with the
"Line Selector"
to which
the strobe or flash is connected.
2. Now, set the "Line Source" to "mvExposureAndAcquisitionActive" .
This means that the signal will be high for the exposure time and only while acquisition of the camera is active.
Figure 1: Setting the "Line Source" to "mvExposureAndAcquisitionActive"
Additionally, you can shift the signal controlling the flash or strobe using the camera. The camera will send the
signal at the selected output line either sooner or later. The following figure demonstrates the procedure using
wxPropView (p. 65 )
1. Enable in "Setting -
>
Base -
>
Camera -
>
AcquisitionControl" the property "mvExposureActiveShift
←
-
Enable" .
The property "mvExposureActiveShift" will appear.
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