For the target

According to the infrared radiation characteristics of the target under test infrared system can be set.

Atmospheric attenuation

Infrared radiation of the target under test through earth's atmosphere, because the gas molecules and various gases as well as a variety of aerosol particle scattering and absorption, will make the infrared source of infrared radiation attenuation.

The optical receiver

It receives the target part of the infrared radiation and transmission to the infrared sensor. Is equal to the radar antenna, commonly used is objective.

Radiation modulator

To clinch a deal from the radiation of the target under test modulation radiation light, the target azimuth information, and can filter out the interference signal of large area. Also called modulation chopper and disk, it has many kinds of structure.

Infrared detector

This is the core of the infrared system. It is presented by using the infrared radiation and matter interaction of the physical effects of the infrared radiation detection sensors, in most cases is to use the electronic effect of this interaction are presented. This kind of detector can be divided into two large, photon detector and thermal sensitive detector type.

The probe refrigerator

For some detectors have to work under high temperature, so the corresponding system must have a refrigeration equipment. After cooling, the equipment can shorten response time, improve the detection sensitivity.

The signal processing system

To detect the signal amplifying, filtering, and extract the information from these signals. And then converted to the required format of such information, and finally to control equipment or display.

Display device

This is the terminal equipment infrared equipment. Commonly used display oscilloscope, kinescope, infrared photosensitive material, indicating instruments and recorders, etc.

In accordance with the above process, infrared system can complete the corresponding physical quantity measurement. Infrared system is the core of infrared detector, according to the detection mechanism is different, can be divided into two major categories of heat detector and photon detector. Below as heat detector as an example to analyze the principle of the detector.

Heat detector is using the radiant heat effect, after receiving the radiant energy detection element, cause temperature rise, which depends on the performance of the temperature change in the detector. Testing the performance of one change, can detect radiation. In most cases is to detect radiation through thermal power change. When components receive radiation, causing the non-electricity physical changes, can through the proper measurement of the corresponding power change after the transformation.

Figure of omron company as shown on the diffuse reflection type and correlation photoelectric sensors, these two kinds of sensor is mainly used for event detection and object orientation. States of the red light and green light sensor in the figure.

Infrared sensor has been in the production practice of modernization plays a huge role, with the improvement of detection equipment and other parts of the technology, the performance of the infrared sensor to have more and better sensitivity.