Current model field of view angle table
What is radius resolution?
radius resolution is the angle seen by one pixel, expressed in unit of "mrad." π(rad)=180° Multiplying this value by the measurement distance (m) gives the measurement size (mm) of one pixel at that distance.
How to read: rad=radian: radian
Spot size vs. field of view
The approximate size of the entire measurement image can be determined by radius resolution (instantaneous field of view) x distance x number of pixel.
Example) CPA-T530S: 320 x 240 pixel
|
0.5m |
1m |
2m |
3m |
5m |
10m |
20m |
| Vertical field of view 320 pixel (m) |
0.22 |
0.44 |
0.87 |
1.31 |
2.18 |
4.35 |
8.5 |
| Horizontal field of view 240 pixel (m) |
0.16 |
0.32 |
0.65 |
0.98 |
1.63 |
3.26 |
6.5 |
| Spot size (instantaneous field of view) (□mm) |
0.68 |
1.36 |
2.72 |
4.08 |
6.80 |
13.6 |
26.6 |
*However, this spot size is not sufficient for temperature measurement.
For temperature measurements, a size at least three times larger is required.
Relationship between measurement distance and instantaneous field of view
The distance to the object being measured can be calculated from radius resolution (instantaneous field of view).
If you measure without considering the distance, it may result in a misdiagnosis, such as the peak display being lower than the actual value.
Example) CPA-T530S: 320 x 240 pixel
The difference between temperature resolution and temperature accuracy
Temperature resolution is the smallest temperature difference that a measuring device (infrared thermography) can determine.
Temperature accuracy is the error between the true value (temperature in blackbody furnace) and the measured temperature.
