Baumer TXG - 4.7.7 Double Shutter

56
4.7.7 DoubleShutter
This feature offers the possibility of capturing two images in a very short interval. Depend-
ing on the application, this is performed in conjunction with a ash unit. Thereby the rst
exposure time (t
exposure
) is arbitrary and accompanied by the rst ash. The second expo-
sure time must be equal to, or longer than the readout time (t
readout
) of the sensor. Thus the
pixels of the sensor are recepitve again shortly after the rst exposure. In order to realize
the second short exposure time without an overrun of the sensor, a second short ash
must be employed, and any subsequent extraneous light prevented.
Trigger
Prevent Light
Exposure
Readout
Flash
On Baumer TXG cameras this feature is realized within the sequencer.
In order to generate this sequence, the sequencer must be congured as follows:
Parameter Setting:
Sequencer Run Mode Once by Trigger
Sets of parameters (o) 2
Loops (m) 1
Repeats (n) 1
Frames Per Trigger (z) 2
Figure62►
Example of a double
shutter.