Calibration Reasons for using a blackbody radiation source for non-contact infrared thermal imaging cameras
1. Can absorb all radiation;
2. Under a constant wave condition, no object can emit more energy than a black body at the same temperature;
3. The black body is a source of diffuse reflection.
People have been using black bodies for more than 70 years. Black bodies provide thermal radiation sources as standard references for laboratory and outdoor tests and test the working parameters of thermal imagers.
In practical applications, infrared thermal imagers have developed rapidly in recent decades. The temperature correction of non-contact thermal radiation requires black bodies to change from a single point form to an array distribution, and to change from point to surface.
The black body no longer appears in the form of a single point, but a planar array, and the requirements for sensitivity are getting higher and higher.
The black body is the reference source used to calibrate the infrared system. Its spectral energy can be obtained by calculation. It is used in industries, laboratories, scientific research, and national defense to confirm infrared point thermometers, line scanning thermometers, and thermal images. instrument standard source.
Commonly used blackbody radiation sources, the temperature controller of the radiation source is used to control the temperature of the radiation source, and the blackbody radiation temperature can be set arbitrarily within the range of general temperature to relatively high temperature such as 1400°C. Using precision thermal resistance and thermocouple installed inside the black body radiation source can improve the accuracy and repeatability of the black body. Using a high-performance PID temperature controller to use blackbody radiation temperature resolution can basically reach 0.1°C or higher.
The blackbody radiation source uses heat-resistant and stable thermal insulation materials, which have the characteristics of long life and fast temperature stability.