Adimec Camera Link OPAL Series, Operating And Users Manual

Page: 53 / 86

OPERATING AND USER MANUAL OPAL FAMILY
53
IMAGE AND DATA FORMATTING
NOTE: In practice, the memory locations that already have been read out during acquisition are
available as free memory.
As an example; the OPAL-1000 has a memory capacity of 64 images of 12 bit resolution. Maximum
acuisition speed is 120 frames per second. When reading out the memory at 60 frames per second
during acquisition, the total number of 64 + 32 + 16 + 8 + 4 + 2 = 126 frames can be acquired before
memory overrun occurs.
When memory overrun has occurred, the burst memory can be flushed and the BO flag can be cleared
by the FB command.
Command syntax: FB
Vertical remap 8.5
The camera is equipped with a four-tap CCD. Data is read from the top and the bottom of the CCD
simultaneously. For applications requiring minimum frame data delay, it might be advisable to operate
the camera with vertical remapping disabled. In that case top and a bottom pixel will be output
through the Camera Link Interface simultaneously. The top pixel will be at tap A and the bottom pixel
at tap B, provided vertical mirror is disabled. This is illustrated in figure 8.2 & 8.3 by means of a 36
pixel CCD ( 6 x 6)..
Output with vertical remap disabled Figure 8.2: Example 36 pixel CCD Figure 8.3:
For a more intuitive camera output it is possible to enable the vertical remap function. The data from
the CCD will be rearranged in order to provide normal left-to-right, top-to-bottom scanning. Note that
the Camera Link data will be delayed half a frame when compared with the no-remapping situation.
When remapping is enabled, neighboring odd and even pixels will be output simultaneously. The odd
pixels will be at tap A and the even pixels at tap B, provided the horizontal mirror is switched off.
Output with vertical remap enabled. Figure 8.4: Example readout direction. Figure 8.5:
Bottom
36 31
1 6
7
25
13
19
Left Right
Top
Output image
LVAL
Tap A
Tap B
1
31
7
25
6
36
2
LVAL
Tap A
Tap B
1
2 4
3 5
6
7
8 10
9 11
12
Bottom
1 6
7
Left Right
Top
Output image
2 5 4 3
8