49
9.7.5 Double Shutter
This feature gives you the option to capture two images within a very short period of time.
Depending on the application, this is performed in conjunction with a flash unit. The first
exposure time (t
exposure
) is arbitrary and accompanied by the first flash. The second expo
-
sure time must be equal to, or longer than the readout time (t
readout
) of the sensor. The
pixels of the sensor are therefore receptive again shortly after the first exposure. In order
to realize the second short exposure time without an overrun of the sensor, a second short
flash must be used, and any subsequent extraneous light prevented
.
Trigger
Prevent Light
Exposure
Readout
Flash
On Baumer VLU cameras, this feature is realized within the sequencer.
In order to generate this sequence, the sequencer must be configured 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
Device Reset
9.8
The Device Reset feature corresponds with the turn off and turn on of the camera. The
camera starts up again with the adjusted User Set.
It is therefore no longer necessary to interrupt the power supply.
◄ Figure 40
Example of a double
shutter.
Summary of Contents for USB3 Vision
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Page 5: ...5 15 Warranty Notes 57 16 Support 57 17 Conformity 17 1 CE 17 2 RoHS ...
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