Infrared thermal imaging cameras use infrared detectors, optical imaging objectives and optomechanical scanning systems (the current advanced focal plane technology eliminates the need for optomechanical scanning systems) to receive the infrared radiation energy of the target to be measured and release the pattern to reflect the photosensitive infrared detector Yuan Shang. Between the optical system and the infrared detector, there is an opto-mechanical scanning mechanism (the focal plane thermal imager does not have this mechanism) to scan the infrared thermal image of the measured object and focus it on the unit or spectroscopic detector. The infrared radiant energy is converted into an electrical signal, and the infrared thermal image is displayed through a TV or a monitor after amplifying, converting, or standard video signal.

Infrared is an electromagnetic wave with the same essence as radio waves and visible light. The discovery of infrared is a leap in human understanding of nature. The technology that uses a special electronic device to convert the temperature distribution on the surface of an object into an image visible to the human eye and displays the temperature distribution on the surface of the object in different colors is called infrared thermal imaging technology. This electronic device is called an infrared thermal imager.

Thermal imaging camera is a science that uses optoelectronic devices to detect and measure radiation and establish a correlation between radiation and surface temperature. Radiation refers to the movement of heat that occurs when radiant energy (electromagnetic waves) moves without direct conduction media. The working principle of modern infrared thermal imaging cameras is to use photoelectric equipment to detect and measure radiation, and to establish a correlation between radiation and surface temperature. All objects above absolute zero (-273°C) will emit infrared radiation.

The infrared thermal imager uses infrared detectors and optical imaging objectives to receive the infrared radiation energy distribution pattern of the target and reflect it on the photosensitive element of the infrared detector to obtain an infrared imaging image. This thermal image corresponds to the heat distribution field on the surface of the object . In simple terms, an infrared thermal imager converts the invisible infrared energy emitted by an object into a visible thermal image. The different colors on the thermal image represent the different temperatures of the measured object. By viewing the thermal image, you can observe the subject temperature distribution of the measured target. After studying the heating of the target, you can judge the next step.