
9.3 CMOS
9.3.1 Details of operation
The CMOS sensors offer two different modes of operation:
Free running mode (Overlapping integration and readout)
1.
Snapshot mode (Sequential integration and readout)
2.
9.3.1.1 Free running mode
In free running mode, the sensor reaches its maximum frame rate. This is done by overlapping erase,
integration and readout phase. The sensor timing in free running mode is fixed, so there is no control when to
start an acquisition. This mode is used with trigger mode
Continuous
.
9.3.1.2 Snapshot mode
In snapshot mode, the image acquisition process consists off several sequential phases:
Trigger
1.
Erase, exposure and readout
2.
9.3.1.2.1 Trigger
Snapshot mode starts with a trigger. This can be either a hardware or a software signal.
The CMOS sensors used in mvBlueLYNX-X cameras support the following trigger modes:
Mode / Setting
(Device
Specific)
Setting (GenICam)
Description
Continuous
TriggerSelector =
FrameStart
TriggerMode = Off
Free running, no external trigger signal needed.
OnDemand
TriggerSelector =
FrameStart
TriggerMode = On
TriggerSource =
Software
ExposureMode =
Timed
To trigger one frame
execute the
TriggerSoftware
command then.
Image acquisition triggerd by command (software trigger).
OnLowLevel
TriggerSelector =
FrameStart
TriggerMode = On
As long as trigger signal is Low camera acquires images with
own timing.
mvBlueLYNX-X Technical Manual
MATRIX VISION GmbH
22 April 2016 Version - 1.49
65
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