National Instruments NI Vision NI 17xx User Manual

Also see for NI Vision NI 17 Series: User manual User manual

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National Instruments NI Vision NI 17xx User Manual Manual pdf 48 page image

Chapter 5 Image Acquisition© National Instruments Corporation 5-9 NI 17xx Smart Camera User ManualWhen strobing is enabled, the smart camera waits until the image readoutis complete before turning on the light for the next frame, as shown inFigure 5-4.Figure 5-4. Image Acquisition With StrobingDetermining the Trigger DelayIf the trigger delay is set longer than the untriggered minimum frameperiod, the trigger delay value further limits the min frame period. Whenthe trigger delay is specified in milliseconds, the software includes this inthe calculation of the maximum frame rate indicator.Calculating the Minimum Frame PeriodRefer to Equations 5-3 and 5-4 to calculate the minimum frame period foruntriggered acquisitions with and without strobing.(5-3)(5-4)1 Image Readout Completes Before Lighting Strobe Asserts for Next ImageTriggerLighting StrobeExposureImage Readout1min frame period NoStrobeNoTrigger T L E+ +=min frame period WithStrobeNoTrigger T L E R+ + +=