How thermal imaging cameras work

The working principle of thermal imaging camera is mainly based on infrared thermal imaging technology, the following is its detailed working process:

I. Basic Principles

Thermal imaging cameras use infrared detectors, optical imaging objective lenses and optical-mechanical scanning systems (advanced focal plane technology

eliminates the need for optical-mechanical scanning systems) to receive infrared radiation energy distribution patterns of the target under test, which are reflected

on theInfrared detector photosensitive element, thus obtaining infrared thermal image. This thermal image corresponds to the heat distribution field on the surface of the object,

which is essentially a thermal image of the distribution of infrared radiation in various parts of the target object under test.

Second, the specific steps

Receive infrared radiation: the infrared radiation emitted by the target to be measured through the optical imaging objective lens focused on the infrared detector.

The role of the optical system is to filter out the detector does not need the band of infrared light, will need the band of infrared light

Focused on the detector to collect infrared heat distribution signal.

Optoelectronic conversion: The infrared detector converts the received infrared radiation into an electrical signal. In this process, the detector's internal sensitive components will be based on the intensity of the received infrared radiation to generate the corresponding electrical signals.

Signal processing: The converted electrical signals are amplified, filtered and processed to improve the signal-to-noise ratio and clarity of the signals. These signals are then converted into standard video signals or digital signals for subsequent display and analysis.

Image display: The processed signals are displayed on a TV screen or monitor to form an infrared thermogram of the target under test. The different colours on the thermal image represent the different temperatures of the object under test, so that the overall temper