National Instruments NI Vision NI 17xx 用户手册
Chapter 5
Image Acquisition
5-4
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Figure 5-1 illustrates the relationship between an external trigger, a lighting
strobe, and the exposure time.
strobe, and the exposure time.
Figure 5-1. Externally Triggered Mode
The trigger shown in Figure 5-1 represents an external trigger, configured
to use the rising edge as the active edge. The time between the active edge
of the trigger and the assertion of the lighting strobe is a user-configurable
trigger delay. The trigger delay can be configured in either milliseconds or
quadrature encoder counts. The NI 1722 does not support quadrature
encoders.
to use the rising edge as the active edge. The time between the active edge
of the trigger and the assertion of the lighting strobe is a user-configurable
trigger delay. The trigger delay can be configured in either milliseconds or
quadrature encoder counts. The NI 1722 does not support quadrature
encoders.
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User-Configurable Trigger Delay
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Lighting Turn-On Time
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Beginning of Image Readout
Trigger
Lighting Strobe
Exposure
Image Readout
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