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Chapter 5 Image Acquisition
© National Instruments Corporation 5-9 NI 17xx Smart Camera User Manual
When strobing is enabled, the smart camera waits until the image readout
is complete before turning on the light for the next frame, as shown in
Figure 5-4.
Figure 5-4. Image Acquisition With Strobing
Determining the Trigger Delay
If the trigger delay is set longer than the untriggered minimum frame
period, the trigger delay value further limits the min frame period. When
the trigger delay is specified in milliseconds, the software includes this in
the calculation of the maximum frame rate indicator.
Calculating the Minimum Frame Period
Refer to Equations 5-3 and 5-4 to calculate the minimum frame period for
untriggered acquisitions with and without strobing.
(5-3)
(5-4)
1 Image Readout Completes Before Lighting Strobe Asserts for Next Image
Trigger
Lighting Strobe
Exposure
Image Readout
1
min frame period
NoStrobeNoTrigger
TLE++=
min frame period
WithStrobeNoTrigger
TLER+++=