Adimec Camera Link OPAL Series, Operating And Users Manual

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OPERATING AND USER MANUAL OPAL-FAMILY
41
IMAGE CAPTURING AND VIDEO OUTPUT
NOTE: The selection and behavior of the control signals are explained in detail in par. 7.11 and 7.12.
Image Acquisition in double transfer mode (optional) 7.8
Double transfer mode 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. Refer to figure 7.8 for a
simplified basic timing diagram.
Simplified example doube transfer mode Figure 7.8:
In double transfer mode image acquisition is fully controlled by an external trigger input. Basically
operation is the same as normal control mode, except for the important difference that a captured
image will not always be output immediateley, thereby enabling the possibilitiy to capture a second
image immediately after the first one.
This feature can be extremely useful if the average number of required frames per second is within
normal camera capabilities, but when pairs of images must be captured on a much faster base.
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 7.9.
See table 7.2 & 7.3 for the values of all timing parameters.
Timing details double transfer mode. Figure 7.9:
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
Sensor
integration
Image
output
Output im1
Exp 1
Start
Exp. 1
CC1
Exp. 2
Exp 1
End Exp 2
Start
Exp 2
End
t1
Int. lm1
t3
t2 t1
Int. Im2
td_output
td_output
Output im2
t2
t1= td_it_bgn
t2= td_it_end
t3= t_dtm_gapmin