B Camera Timing; Timed Exposure Mode Camera Timing - Photon Focus MV0 3D06 Series User Manual

Camera Timing
B.1 Timed Exposure Mode Camera Timing
Fig. B.1 shows a timing example, when the camera capture frames with rising edges on the
camera ISO_IN input. The external signal, which is fed into the cameras ISO_IN input is isolated
by an opto-isolator. This signal is delayed by t
The "Line In" signal is synchronized to the FPGA clock domain and the rising edge is detected.
There is a clock uncertainty because of the synchronization logic which is shown by the
t value. The input pulse can be delayed by the trigger delay feature (see Section 4.6.6)
input jitter
according to the requirement of the application. Finally the exposure time cycle starts after an
offset delay t
exposure offset
When the application needs a strobe pulse together with the image acquisition, the internal
line in pulse can also be used to start one of the timer. After the timer delay t
timer duration t
timer duraton
5.2). The timer active signal needs to be selected to output it on "Line Out" (see Section 7.2),
which has a fix delay of t
camera electronics which leads to an additional delay of t
The maximum exposure offset value t
one image row, when a new exposure starts during read out of the previous
image. In this case, the start of the exposure is postponed to the start of the
next image row read out.
Table B.1 gives an overview of the minimum and maximum values of the timing parameters.
Timing Parameter
t
iso in
t
input jitter
t
pulse delay
t
expousre offset
t
exposure
t
timer delay
t
timer duration
t
lineout offset
t
iso out
Table B.1: Camera timing parameter values of the timed exposure mode (Footnotes:
after readout of previous image;
MAN083 08/2020 V1.2
.
is started which is shown by the timer active signal (see Section
. The "Line Out" is isolated by an opto-isolator from the
lineout offset
Min Value
5 s
62.5 ns
0 s
187.5 ns 208.3 ns
5.82 s / 11.6 s
0 s
0 s
62.5 ns
5 s
2)
New exposure starts during readout of previous image)
before it reaches the FPGA input "Line In".
iso in
.
iso out
is up to the read out time of
exposure offset
Max Value
18 s
83.3 ns
0.349 s
1)
/ ( time of 1 image row 2.69 s)
0.349 s
89 s
89 s
62.5 ns
18 s
B
the
timer delay
2)
1)
New exposure starts
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