Optical Specifications; Standard Lens - Fluke ThermoView TV40 Series User Manual

®
ThermoView TV40 Series
Users Manual, Rev. 1.1, Apr 2019

2.2 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 larger than that determined by the calculated theoretical spot sizes, which corresponds to 3 x 3 pixels.
For more technical information on the add-on lenses, see section 7.1

2.2.1 Standard Lens

Field of View (FOV)
Instantaneous Field of View (IFOV)
Measurement Field of View (MFOV)
Focus Range (infrared)
Focus, fixed (visible)
Measuring distance
0.3 m (1 ft)
0.5 m (1.6 ft)
1.0 m (3.3 ft)
5.0 m (16 ft)
10 m (33 ft)
18
1.800.561.8187
34° x 25.5° (horizontal x vertical)
1.9 mrad (1 pixel)
5.6 mrad (3 x 3 pixel)
152 mm to ∞ (0.5 ft to ∞)
600 mm (1.96 ft)
Table 2-1: Spot Sizes for Standard Lens
Thermal image (H x V)
0.183 x 0.136 m (0.6 x 0.5 ft)
0.306 x 0.226 m (1 x 0.7 ft)
0.611 x 0.453 m (2 x 1.5 ft)
3.06 x 2.26 m (9.8 x 7.2 ft)
6.11 x 4.53 m (20.2 x 14.9 ft)
www. .com
Add-on Lenses, page 33.
Minimum detectable spot size
(1 pixel)
0.6 mm (1.9 mil)
0.9 mm (3 mil)
1.9 mm (6.1 mil)
9.3 mm (29.7 mil)
18.5 mm (61.2 mil)
information@itm.com
Minimum measurement area
(3 x 3 pixel)
1.7 mm (1.9 mil)
2.8 mm (8.9 mil)
5.6 mm (18.4 mil)
27.8 mm (89 mil)
55.6 mm (183.6 mil)