25
8.2.2.3 Overlapped Operation: t
exposure(n+2)
< t
exposure(n+1)
If the exposure time (t
exposure
) is decreased from the current acquisition to the next acquisi-
tion, the time the camera is unable to process occuring trigger signals (t
notready
) is scaled
up.
When decreasing the t
exposure
such, that t
notready
exceeds the pause between two incoming
trigger signals, the camera is unable to process this trigger and the acquisition of the im-
age will not start (the trigger will be skipped).
Exposure
Readout
t
exposure(n)
t
readout(n+1)
t
readout(n)
t
exposure(n+1)
t
exposure(n+2)
t
triggerdelay
t
min
Trigger
Flash
t
flash(n)
t
flashdelay
t
flash(n+1)
TriggerReady
t
notready
Notice
From a certain frequency of the trigger signal, skipping triggers is unavoidable. In gen-
eral, this frequency depends on the combination of exposure and readout times.
Image parameters:
Offset
Gain
Mode
Partial Scan
Timings:
A - exposure time
frame (n) effective
B - image parameters
frame (n) effective
C - exposure time
frame (n+1) effective
D - image parameters
frame (n+1) effective
E - earliest possible trigger
F - frame not started /
trigger skipped
