What is thermographic imaging?
Using a sensor developed to measure infra-red light from an object to indicate changes in temperature. Red, Green and Blue are the three primary colors detected in commonly used RBG camera sensors.
Colour, frequency & wavelength.
- Red, 400–484 THz, 620–750 nm
- Blue, 606–668 THz, 450–495 nm
- Green, 526–606 THz, 495–570 nm
Infra means below or under so infra-red (IR) is before red in the colour spectrum, infrared spectrum is from: Frequency 430 THz – 300 GHz & Wavelength 700 nm to 1 millimeter
This also means at the lower end of the scale it does not fall on the spectrum of visible light which is: Frequency about 430–770 THz & Wavelengths from about 390 to 700 nm. The infra-red spectrum can be further broken up to Near, Mid and Far. Near being the closest to the visible light and far the other end of the scale.
Because thermal imaging sensors can detect heat (electromagnetic radiation EMR is absorbed by and object, the EMR energy is lost by means of heating up that said object) from an object with or without illumination special sensors are developed and used in various applications. The most commonly known is night vision, but in the drone industry its applications are growing:
What benefits from thermal imaging?
- Building inspections &Structure inspections
- Roof inspections & Flat roof inspections (water damage or thermal inefficiencies)
- Pipeline inspections
- Photovoltaic Solar energy farms
What is a Thermographer?
A thermographer is someone who is trained to interpret the data captured by thermal imaging cameras. These cameras can provide valuable data other than just pictures but having the correctly trained person to quantify the results is often a must. A Thermographer tends to be trained in the different subjects like infrared physics, heat science, infrared measurement equipment and its applications.
Who supplies the cameras?
FLIR a leading thermal imaging camera manufacturer saw the potential of adding a thermal imaging camera to their product line and marketing at the drone industry right at the beginning with the FLIR Vue, this was a very popular size and shape as often GoPro action cameras were used on the first drones. They then partnered with DJI a leading drone manufacturer and released the DJI Zenmuse XT, this was their first camera with direct fitment and compatibility with the DJI Inspire 1 drone. Now after further development they can offer a variety of sensors include dual models:
- DJI Zenmuse XT with Thermal by FLIR
- DJI Zenmuse XT2 with Thermal
- FLIR Duo
- FLIR Duo Pro R
- FLIR Duo R
- FLIR Vue Pro
- FLIR Vue Pro R