Technical Data
Pi20
Rev. B 09/2011
11
3.2
Optical Specifications
The following optical specification is based on the theoretical calculated spot size derived on the pitch
of the camera detector array and the lens focal length. Typically, for accurate temperature
measurements, the target area needs to be 2 to 3 times larger than that determined by the calculated
theoretical spot sizes, which corresponds to 7 x 7 pixels.
21.7° Lens (MA)
Field of View (FOV)
21.7° x 16.4° (horizontal x vertical)
Instant. Field of View (IFOV)
1.2 mrad
Distance to Spot Size Ratio (D:S)
830:1
Focus Range
30 cm to ∞ (12 in to ∞)
Measuring distance
Thermal image (H x V)
Minimum detectable spot size (H x V)
0.3 m
(1 ft)
0.11 x 0.09 m
(0.36 x 0.29 ft)
0.36 x 0.36 mm
(0.014 x 0.014 in)
0.5 m
(1.6 ft)
0.19 x 0.14 m
(0.62 x 0.46 ft)
0.6 x 0.6 mm
(0.023 x 0.023 in)
1.0 m
(3.3 ft)
0.38 x 0.29 m
(1.25 x 0.95 ft)
1.2 x 1.2 mm
(0.047 x 0.047 in)
5.0 m
(16 ft)
1.9 x 1.4 m
(6.2 x 4.6 ft)
6.0 x 6.0 mm
(0.24 x 0.24 in)
10 m
(
33 ft)
3.8 x 2.9 m
(12.5 x 9.5 ft)
12 x 12 mm
(0.47 x 0.47 in)
30° Lens (MB)
Field of View (FOV)
30.0° x 22.7° (horizontal x vertical)
Instant. Field of View (IFOV)
1.7 mrad
Distance to Spot Size Ratio (D:S)
596:1
Focus Range
30 cm to ∞ (12 in to ∞)
Measuring distance
Thermal image (H x V)
Minimum detectable spot size (H x V)
0.3 m
(1 ft)
0.16 x 0.12 m
(0.53 x 0.39 ft)
0.5 x 0.5 mm
(0.02 x 0.02 in)
0.5 m
(1.6 ft)
0.27 x 0.2 m
(0.89 x 0.66 ft)
0.84 x 0.84 mm
(0.033 x 0.033 in)
1.0 m
(3.3 ft)
0.54 x 0.4 m
(1.77 x 1.31 ft)
1.68 x 1.68 mm
(0.066 x 0.066 in)
5.0 m
(16 ft)
2.7 x 2.0 m
(8.8 x 6.5 ft)
8.4 x 8.4 mm
(0.33 x 0.33 in)
10 m
(
33 ft)
5.4 x 4.0 m
(17.7 x 13.1 ft)
17 x 17 mm
(0.67 x 0.67 in)
