The Working Principle and Components of Infrared Thermal Imaging Camera

The Working Principle and Components of Infrared Thermal Imaging Camera


Through a detailed understanding of the working principle and components of infrared thermal imaging cameras, we can learn more about their specific use and performance. This article will specifically introduce the working principle and components of an infrared thermal imaging camera.

the working principle and components of an infrared thermal imaging camera


The main purpose of infrared thermal imaging cameras is to detect and analyze temperature differences, which can be used in many fields. The infrared thermal imaging camera can achieve this function, completely depends on its own working principle and the mutual cooperation of its components. The following is the working principle and components of an infrared thermal imaging camera.

Working principle

All objects above absolute zero (-273°C) emit infrared radiation. 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 imaging camera.

Infrared thermal imaging cameras use an infrared detector, optical imaging objective lens, and photo-mechanical scanning system to receive the infrared radiation energy distribution pattern of the measured target and reflect it on the photosensitive element of the infrared detector. Between the optical system and the infrared detector, there is a light The machine scanning mechanism scans the infrared thermal image of the measured object and focuses it on the unit or spectroscopic detector. The detector converts the infrared radiant energy into electrical signals, which are amplified, converted, or standard video signals pass through the TV screen or monitor The monitor displays the infrared thermal image.

This kind of thermal image corresponds to the thermal distribution field on the surface of the object, but the actual infrared radiation thermal image distribution diagram of each part of the target object under test is very weak and lacks gradation and three-dimensionality compared with the visible light image. In the actual process, in order to more effectively determine the infrared heat distribution field of the measured target, some auxiliary measures are often used to increase the practical functions of the instrument, such as the control of image brightness and contrast, real standard correction, false color drawing contours, and histograms. Mathematical operations and processing, etc.

It should be noted that the thermal image and visible-light image of the same target are different. It is not the visible light image that the human eye can see, but the temperature distribution image of the target surface. In other words, the infrared thermal image cannot be seen directly by the human eye. The surface temperature distribution of the target becomes a thermal image that can be seen by the human eye, which represents the temperature distribution of the target surface.


1. Infrared lens: Receive and converge the infrared radiation emitted by the measured object.

2. Infrared detector assembly: Turn the heat radiation model into an electrical signal.

3. Electronic components: process electrical signals.

4. Display components: Convert electrical signals into visible light images.

5.Software: Process the collected temperature data and convert it into temperature readings and images.

A high-quality thermal imaging camera can accurately detect the numerical difference between the temperatures and will perform better in monitoring. If you want to learn more about infrared thermal imaging cameras after reading the above, you can contact us for more detailed solutions.

With excellent production technology and thoughtful after-sales service, we have become one of the leading infrared thermal cameras manufacturers. We have an experienced production team and also control the quality of products in all directions. At the same time, we can also provide a one-stop service in place according to the needs of customers. If you are interested in our thermal imaging cameras, please contact us immediately!