| Distance: | Min. distance between target and lens |
| px (Pixel): | Single detector element on the camera chip with 640 x 480 detectors |
| FOV (Field of View): | Picture dimensions of camera at a certain distance |
| MFOV (Minimum FOV): | For accurate temperature measurement the target size should cover 3x3 pixels at least. |
| HFOV (Horizontal FOV): | Horizontal expansion of the FOV |
| VFOV (Vertical FOV): | Vertical expansion of the FOV |