TN9 Infrared Thermometer Module
http://www.ZyTemp.com
REV. 07/20/2004
2.3 Field of View
What is D:S =
5:1
This device has a D:S =
5:1
Distance : Spot =
5:1
Fig 2. Field of View
When the Distance is 10 inch, then the measurement spot size is
2
inch.
When the Distance is 20 inch, then the measurement spot size is
4
inch.
In other words, the FOV(Field of View) is
4.8 x 2 = 9.6
degree
Beware
the
Vignette
Good Design, No Vignette
Fig 3. Good Design Field of View