Infrared (IR) thermography offers precise temperature measurement in various wavelength ranges such as short wave infrared (SWIR), mid wave infrared (MWIR) and long wave infrared (LWIR) of a wide range of materials.
Spectral IR thermography uses adapted wavelength windows and therefore enables precise temperature measurements considering the specific IR properties of the object and the measurement situation. Selecting suitable spectral filters, for example, allows temperature measurement of objects behind a glass pane, or even specifically of the glass surface itself.
Source: InfraTec
Fields for spectral thermography
Spectral filters select radiation in defined infrared ranges to consider the specific IR properties of the respective measurement situation. This allows any interfering background radiation to be suppressed and measurement errors to be avoided.
However, not all IR-protective windows offer, for instance, complete IR transmission and thus have unwanted radiometric influence. This can be masked by adapted spectral filters to ensure a correct radiometric measurement of an object behind the window. Likewise, interfering radiation from flames can be suppressed in order to measure “through the flame.” In contrast, gases in a flame can be identified with the help of spectral filters.
Learn more about the possibilities of spectral thermography and the requirements for infrared cameras and software in this online event presented by InfraTec, on Tuesday, September 30, 2025, 4:00 AM to 6:00 AM EDT.
