FLIR X8400sc, Руководство пользователя

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User Manual X8400 sc 34
6.5.2 Integrate While Read
The Integration and the Data Readout periods can be thought of as two separate processes.
However, they are linked together by certain timing requirements. This means that the
camera can integrate for a period, starts the data read out for that integration period, and
during that readout starts the integration period for the next frame. This process is called
Integrate While Read (IWR) and can greatly speed up frame rates as seen in
Figure 7 . The drawback to this process is that it injects a fixed
pattern noise into the data which can be removed by performing a Non Uniformity Correction
(NUC) to the data.
Figure 7: IWR Frame Generation Process
Max Achievable frame rate in IWR Mode – Base Mode 6.5.2.1
Number of points
1280 1152 1024 896 768 640 512 384 256 128
N
u
m
b
e
r
o
f
li
n
e
s
1024 57 63 71 80 92 106 106 106 106 106
896 65 72 80 91 105 121 121 121 121 121
768 76 84 93 106 122 140 140 140 140 140
640 90 100 111 126 145 167 167 167 167 167
512 112 124 138 156 179 206 206 206 206 206
384
148 163 181 205 235 270 270 270 270 270
320 176 193 215 243 278 319 319 319 319 319
256 216 238 265 298 341 391 391 391 391 391
224 245 269 299 337 385 440 440 440 440 440
192
282 310 344 386 441 503 503 503 503 503
160 332 364 404 453 516 587 587 587 587 587
128 403 442 490 548 622 706 706 706 706 706
96 515 563 621 693 784 885 885 885 885 885
64
711 774 850 943 1058 1185 1185 1185 1185 1185
56 786 855 937 1036 1160 1294 1294 1294 1294 1294
48 878 953 1043 1150 1283 1426 1426 1426 1426 1426
40 995 1078 1175 1292 1435 1588 1588 1588 1588 1588
32 1149 1240 1347 1474 1628 1792 1792 1792 1792 1792
24 1358 1459 1577 1716 1882 2055 2055 2055 2055 2055
16 1660 1773 1902 2053 2229 2409 2409 2409 2409 2409
8 2134 2258 2397 2553 2732 2911 2911 2911 2911 2911
2 2717 2841 2976 3125 3290 3449 3449 3449 3449 3449
Table 7: Maximum Frame Rate vs Image Size
(detector Mode: IWR / Base / integration time = 1500µs)
Note
•
In IWR mode, the integration time has much less effect on maximum frame rate.
Integration
Data Read
Frame Sync
Integration Period Dead Time Data Width
Dead Time
Integration
Data Read
Frame Sync
Integration Period Dead Time Data Width Dead Time
Integration must end after
the Dead Time following
the previous frame’s Data
Read
Integration can’t start
before previous frame’s
Data Read