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8
Radiometric measurement
Note
• An NUC update is recommended any time an adjustment is made to either the frame
rate or the integration time, regardless of the integration mode.
• The IWR mode is not available in all camera models.
8.5.2 The ITR process
As seen in Figure 8.3, the frame generation process begins with a frame synchronization
(Frame Sync). The camera then integrates the set amount of time, goes through a fixed
dead time, transmits data, goes through a second fixed dead time, and then is ready to
start the process over again. The figure shows that the camera first completes the inte-
gration process and then reads the data out, hence the term "integrate then read."
Figure 8.3 The ITR frame generation process.
All timings for the frame generation process are based on a 20 MHz clock, yielding a res-
olution of 50 ns. The minimum integration time for the FLIR X6570sc is 10 µs.
8.5.2.1 Maximum achievable frame rate in ITR—base mode
Table 8.1 Maximum frame rate (in Hz) versus image size (detector mode: ITR/base/integration time = 10
µs)
Number of points
Num-
640
576
ber of
lines
512
233
258
448
266
294
384
309
342
320
369
408
256
458
506
224
520
575
192
603
665
160
716
790
128
882
972
96
1147
1262
64
1641
1799
56
1839
2014
48
2092
2287
40
2424
2645
32
2882
3136
24
3555
3850
16
4636
4987
8
6661
7076
1
10 785
11 170
#T810204; r. AA/43079/43091; en-US
512
448
384
320
289
328
380
450
329
374
432
512
383
434
501
593
456
517
597
706
565
640
738
871
642
726
837
987
742
840
966
1138
880
995
1143
1343
1082
1220
1399
1639
1402
1577
1802
2102
1992
2230
2532
2930
2226
2487
2817
3250
2522
2811
3175
3648
2909
3233
3637
4158
3437
3803
4257
4833
4199
4618
5130
5770
5396
5878
6455
7157
7546
8082
8701
9423
11 584
12 030
12 512
13 034
256
192
160
552
715
838
628
811
950
727
938
1097
863
1111
1298
1063
1364
1588
1202
1538
1788
1383
1764
2045
1628
2067
2389
1979
2497
2873
2522
3151
3601
3476
4271
4823
3838
4688
5271
4286
5194
5810
4851
5823
6471
5589
6626
7303
6591
7685
8380
8031
9147
9830
10 275
11 296
11 887
13 601
14 220
14 551
37
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