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Operation and Features
Second, you need to calculate the maximum recommended frame rate for low smear using this
formula:
Frames/sec.
where:
If you use an example with a 2000 µs exposure time and a 1392 (H) x 600 (V) area of interest, the
calculations look like this:
T(f)
=
T(f)
=
and:
Frames/sec.
Frames/sec.
If the camera's actual frame rate is higher than the maximum
recommended frame rate, the smearing will come back.
When you exceed the maximum recommended frame rate
by a small amount, the upper part of the image will show
partial smearing (Figure 3-10). As the frame rate is
increased, the smearing will become worse.
3-14
1,000,000
------------------------------------------------------------------------------------
æ
–
----------- -
T(f)
+
AOIH
64.22
T(f) = frame transfer time
AOIH = number of lines in the AOI
T(e) = exposure time
ξ
Ε
646.5 µs
+
1040 600
–
44,540 µs
----------------------------------------------------------------------------------------------------------------
æ
+
44,540 µs
20.12
DRAFT
T(e)
ö
⌠
5.57
+
T(e)
⌠
ζ
ξ
Φ
Ε
12.04 µs
+
600
1,000,000
2000
ö
⌠
–
----------- -
600
5.57 µs
64.22
⌠
ζ
Φ
+
1
64.22 µs
+
2000 µs
Figure 3-10: Partial Smear
BASLER A102
k
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