Adimec Camera Link OPAL Series, Operating And Users Manual

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OPERATING AND USER MANUAL OPAL-FAMILY
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IMAGE CAPTURING AND VIDEO OUTPUT
Image Acquisition in double delayed transfer mode (optional) 7.9
Double delayed transfer mode also allows for the capture of two images shortly after each other.
Image readout of both images is postponed until integration of the second image is completed.
Image readout of the second frame is controlled by a separate control signal. Refer to figure 7.5 for a
simplified basic timing diagram.
Simplified example double delayed transfer mode. Figure 7.10:
In double delayed transfer mode image acquisition is fully controlled by two external trigger inputs.
Basically operation is the same as double transfer mode, except for the important difference that the
frame readout of the 2nd image is controlled by an additional external control signal. Note that frame
readout of the first images is still controlled by the same signal that controls the exposure.
This mode is useful at the same conditions as double transfer mode. In double transfer mode the
second image is generated immediately after the first one. If the host system (frame-grabber) is not
able to capture the second image directly after the first one, the double delayed transfer mode makes
it possible to delay the second image. General timing constraints are difficult to state, because they
are completely dependent on the application. In general the constraints applicable can be derived
from the timing diagram shown in figure 7.11.
See table 7.2 & 7.3 for the values of all timing parameters.
Timing details double delayed timing mode. Figure 7.11:
NOTE: The selection and behavior of the control signals are explained in detail in par. 7.11 and 7.12.
Integr. im. 1 Integr. im. 2
Im. 1 read-out
Im. 2 read-out
CCD Operation
Camera Output
Control Signal #2
Control Signal #1
CC1
t1 t2
Int. Im1
td_output
Output im1
Exp1
Start
Exp. 1
Exp1
End
t1
t2
Int. Im2
Exp2
Start
Exp. 2
Exp2
End
t3
Output im2
td_output
t1
t2
t3
= td_it_bgn
= td_it_end
= t_dtm_gapmin
CC2
sensor
integration
Image
output