Principle of infrared imaging technology

In nature, any object whose temperature is higher than absolute zero (-273℃) can radiate infrared rays, which together with visible light, ultraviolet rays, X rays, gamma rays, cosmic rays and radio waves form a complete and continuous electromagnetic spectrum. Its wavelength is between 0.78μm and 1000μm, which is invisible light with a longer wavelength than red light.

infrared ray

2. The working principle of infrared thermal imager

Infrared thermal imager converts infrared thermal radiation into corresponding electrical signals, and after amplification and video processing, it forms a video image observed by naked eyes. Generally speaking, it is to turn invisible infrared radiation into visible thermal image, reflecting the temperature distribution on the target surface.

Working principle of infrared thermal imaging

3. Infrared thermal imaging tips:

1) thermal image reflects the distribution of infrared radiation on the surface of an object, which depends on the spatial distribution of emissivity and temperature of the object.

2) Different infrared thermal imagers from different manufacturers have different preset color palettes, which have different effects on image color processing.

3) The classic iron-red palette is used in the picture below, with yellow representing the high temperature zone and purple representing the low temperature zone.

Electric power detection