FLIR Systems, a designer and manufacturer of infrared imaging solutions for unmanned aerial systems (UAS) and other unmanned vehicles, has released an article outlining the essential specifications to be considered when buying a thermal imaging system for a particular application.
The article explains the following aspects of thermal cameras:
- Range – the entire span of temperatures the camera is calibrated to and capable of measuring
- Field of View (FOV) – the extent of a scene that the camera will see at any given moment, determined by the camera lens
- IR Resolution – how many pixels the camera has on the scene
- Thermal Sensitivity/Noise Equivalent Temperature Difference (NETD) – the smallest temperature difference that can be seen with the camera
- Focus – fixed, manual or automatic
- Spectral Range – the range of wavelengths that the sensor in the camera detects
These important specifications need to be considered together when assessing the suitability of a thermal imaging camera for a particular application. For instance, when detecting subtle issues such as moisture, high resolution will only be useful if the camera also has high thermal sensitivity. To find out more, read the full article on FLIR’s website.