Itala | INSTRUCTION MANUAL
Figure 45: When TriggerOverlap is set to Readout, the fol-
lowing exposure time can be accepted when the current
frame is being transfered to the internal memory, but the
latency is affected by a higher uncertainty. From top to bot-
tom, the sensor exposure and readout signals are depicted.
• ExposureTimeInc: value of the discrete step for increasing/decreasing exposure time.
ExposureTimeMax is constant for both TriggerOverlap configurations (Off and Readout).
ExposureTimeMin differences between TriggerOverlap = Off and TriggerOverlap = Readout depend
on sensor model, but are usually negligible.
TriggerOverlap mainly impacts on ExposureTimeInc value.
• When TriggerOverlap = Off, Exposure Time granularity is quite fine, in the order of tens of
nanoseconds.
• When TriggerOverlap = Readout, Exposure Time granularity is strongly related to sensor line
period, i.e. time needed by the image sensor to read a single line.
In this configuration, the exposure time increment depends on sensor model, but usually is
in the order of tens on microseconds.
Anyway, the ExposureTime set by the user is automatically adjusted by the device, depending on
current camera configuration.
6.3.2 Dual Exposure
The Dual Exposure feature allows to acquire two frames as close as possible, making it easier
inspecting fast moving objects or involving different sources of light. This can be achieved overlap-
ping the first sensor readout with the second sensor exposure, as shown in Figure 46.
By default, the feature oeDualExposureEnable is not available. Dual Exposure is available only
when TriggerMode is set to ON and TriggerOverlap is set to Readout. When oeDualExposureEn-
able is ON the AcquisitionBurstFrameCount disappears and it is automatically set to 2.
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