What is the imaging principle of infrared thermal imager?
Infrared thermal imager is an instrument that visually displays the temperature data of the measured object in the form of surface imaging.
Anything above zero degrees (-273°C) emits infrared light.
The imaging principle of the infrared thermal imager is to use the infrared detector to read the infrared radiation energy distribution of the measured target received through the optical imaging objective lens, and reflect it on the photosensitive element of the infrared focal plane detector according to the original spatial order distribution;
Infrared detectors convert infrared radiation energy into electrical signals, and convert radiation energy into temperature values through Planck's law;
Amplify, convert or standard video signal to display infrared thermal image through monitor.
This thermal image corresponds to the heat distribution field on the surface of the object.
Through software settings, the infrared thermal imager will automatically calibrate different colors for different temperatures on the thermal image.
Compared with ordinary thermal imagers, cooled thermal imagers are characterized by using the principle of Stirling engine to mechanically generate an extremely low temperature environment (-200°C) in the detector space;
(The infrared radiation generated by the infrared detector itself can be ignored) The MCT or InSb photoelectric sensor rapidly absorbs the energy of the mid-wave infrared photons, excites electrons, and collects them, thereby obtaining temperature field information with high time and temperature accuracy.
The infrared thermal imager uses the optical imaging objective lens to receive the infrared radiation energy of the measured target and reflect it to the MCT or InSb focal plane array (infrared detector);
Each point of the focal plane is a pixel in the image, and the combination of all pixels is an infrared thermal image, which corresponds to the thermal distribution field on the surface of the object.
In layman's terms, Telops infrared thermal imager is an infrared band camera that converts invisible infrared energy emitted by objects into visible thermal images.
The different colors on the top of the thermal image represent the different temperatures of the object being measured.
Infrared thermal imager is a remote sensing temperature measuring instrument. It does not need to be in contact with the measured target when measuring temperature. The principle of infrared thermal imager comes from Planck's law.
When the thermal imager is imaging, each pixel corresponds to an area of the object to be measured, and the temperature data displayed by the pixel is the average temperature of the detected area;
Therefore, the closer the thermal imager is to the measured target, the clearer and more accurate the thermal image, and the higher the temperature resolution and spatial resolution.
