If exposure time is lower than read out time:
1000
FPS_max = -------------
ReadOutTime
If exposure time is greater than read out time:
1000
FPS_max = --------------
ExposureTime
21.4.3.2 Snapshot mode
To calculate the maximum frames per second (FPS
max
) in snapshot mode you will need following
formula:
2 ImageHeight + 10
ReadOutTime = InternalLineLength * ---------------- * (-----------------)
InternalADCClock 1000
1000
FPS_max = ----------------------------
ReadOutTime + ExposureTime
21.4.3.3 Linescan mode
The sensor offers also a usage as a line scan sensor. One (gray scale sensor) or two lines (in terms
of color sensor) can be selected to be read out of the full line height of 1600 lines. This or these
lines are grouped to a pseudo frame of selectable height in the internal buffer of the camera.
The camera then outputs these frames which contain multiples of the same scan line(s) without
gaps or interruptions.
To operate in line scan mode, use the following properties:
In "Setting -> Base -> Camera -> GenICam -> Device Control", please
change the Device Scan Type to Linescan.
•
In "Setting -> Base -> Camera -> GenICam -> Image Format Control",
please set Width and Height. _Height_ specifies how often the same line(s) will be used
to reach the height of the image.
Use Offset X to shift horizontally the starting point of the exposed line.
Use and Offset Y to shift the scan line vertically.
•
Note:
The sensor will not get faster by windowing in x direction.
Finally, in "Setting -> Base -> Camera -> !GenICam -> Acquisition
Control", please adapt the Exposure Time.
The exposure time as to be low and max. approx. 60 us in order to achieve the max.
linescan rate of 12.6 kHz.
•
You may use longer exposure times at the expense of scanning frequency.
Note:
Using more than one line e.g. 5, is like having an area scan with ImageHeight = 5. In
linescan mode, the max. ImageHeight is 16.
21 Appendix A.2 CMOS specific camera / sensor data
1577
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