Exposure Time (Shutter) And Offset - Allied Vision Technologies AVT Marlin Technical Manual

Controlling image capture

Exposure time (shutter) and offset

The advanced register allows to delay the start of the integration by max.
21
2 µs, which is max. 2.1 s after a trigger edge was detected.
Note
• Switching trigger delay to ON also switches external
Trigger_Mode_0 to ON.
• This feature works with external Trigger_Mode_0 only.
• The exposure (shutter) time for continuous mode and Trigger_Mode_0 is
based on the following formula:
Shutter register value x timebase + offset
• The exposure (shutter) time for Trigger_Mode_1 is based on the follow-
ing formula:
Length of active pulse + offset
Note
• Trigger_Mode_1: Do not make the pulse shorter than 20
µs, because this will not shorten the exposure time any
further.
• Trigger_Mode_1: If you start exposure while the sensor
is being read out, there will be an additional jitter for
the exposure time (the jitter values are the same as in
Table 48: Jitter at exposure start (no binning, no sub-
sampling)
The register value is the value set in the corresponding IIDC register
(SHUTTER [81Ch]). This number is in the range between 1 and 4095.
The shutter register value is multiplied by the time base register value (see
Table 103: Timebase ID
A camera-specific offset is also added to this value. It is different for the
camera models:
on page 127).
on page 209). The default value here is set to 20 µs.
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