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2. Everything in nature, as long as its temperature is higher than the absolute zero (-273 ℃),
can radiate electromagnetic waves, infrared radiation is the existence of the most natural
electromagnetic radiation.
Principle of thermal radiation
4. 160
120
288
384
480
640
1024
768
Detector resolution is an important parameter to measure the merits of a detector, indicating how many units
of detector elements are on the focal plane of the detector.
At present the mainstream resolution of 160 × 120,384 × 288,640 × 480,1024x768 and so on.
The higher the resolution, the clearer the imaging.
5. Detect Disatance (Johnson criteria)
Human(1.8×0.5m)
Vehicle (1.4×4.0m)
R
D
I
8mm
R
D
I
R
D
I
50mm
75mm
1000m
40m
20m
160m
250m
125m
1500m
375m
188m
R
D
I
8mm
R
D
I
R
D
I
50mm
75mm
3067m
123m
61m
491m
767m
383m
4600m
1150m
575m
R
D
I
Detection
Recognition
Identification
Detect Recognition Identification