ThermoView
®
TV40 Series
Users Manual, Rev. 1.1, Apr 2019
36
7.1.2 Tele Lens 4x
Field of View (FOV)
8.5° x 6.3° (horizontal x vertical)
Instantaneous Field of View (IFOV)
0.5 mrad (1 pixel)
Measurement Field of View (MFOV)
1.4 mrad (3 x 3 pixel)
Focus Range (infrared)
2540 m
m to ∞ (8.3 ft to ∞)
Focus, fixed (visible)
600 mm (1.96 ft)
Table 7-4: Spot Sizes for Tele Lens 4x
Measuring distance
Thermal image (H x V)
Minimum detectable spot size
(1 pixel)
Minimum measurement area
(3 x 3 pixel)
3.0 m (9.8 ft)
0.446 x 0.330 m (1.5 x 1.1 ft)
1.4 mm (4.5 mil)
4.2 mm (13.6 mil)
5.0 m (16 ft)
0.74 x 0.55 m (2.4 x 1.8 ft)
2.3 mm (7.4 mil)
7 mm (22.3 mil)
10 m (33 ft)
1.49 x 1.1 m (4.9 x 3.6 ft)
4.6 mm (15.3 mil)
13.9 mm (45.9 mil)
Figure 7-3: Dimensions of ThermoView TV40 with Tele Lens 4x
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