Jitter at start of exposure, Described in chapter – ALLIED Vision Technologies Pike F-1600 User Manual
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Controlling image capture
PIKE Technical Manual V5.1.2
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The following screenshot shows an example of broadcast commands sent with
the Firedemo example of FirePackage:
•
Line 1 shows the broadcast command, which stops all cameras connected
to the same IEEE 1394 bus. It is generated by holding the
while clicking on
•
Line 2 generates a broadcast one_shot in the same way, which forces all
connected cameras to simultaneously grab one image.
Jitter at start of exposure
The following chapter discusses the latency time which exists for all Pike CCD
models when either a hardware or software trigger is generated, until the actual
image exposure starts.
Owing to the well-known fact that an Interline Transfer CCD sensor has both a
light sensitive area and a separate storage area, it is common to interleave
image exposure of a new frame and output that of the previous one. It makes
continuous image flow possible, even with an external trigger.
The uncertain time delay before the start of exposure depends on the state of
the sensor. A distinction is made as follows:
FVal is active the sensor is reading out, the camera is busy
In this case the camera must not change horizontal timing so that the trigger
event is synchronized with the current horizontal clock. This introduces a max.
uncertainty which is equivalent to the line time. The line time depends on the
sensor used and therefore can vary from model to model.
FVal is inactive the sensor is ready, the camera is idle
Figure 115: Broadcast one-shot