How to choose a good infrared thermal imager?
First, when choosing a thermal imager, the most important thing is the heart—the core of the infrared thermal imager. The heart of the computer is the CPU, and the heart of the thermal imager is the infrared detector. Detectors are classified as refrigerated and non-refrigerated. They are small in size and low in power consumption. At present, non-refrigerated infrared focal plane detectors are mainly used in the civilian market. As a bridge between infrared radiation and output signals, the "thermal sensitive components are The core of this core of the infrared detector. "Second, the second most important is the sensitivity NETD. Thermal sensitivity is the core index of the thermal imager. NETD is the noise equivalent temperature difference. The lower the value, the clearer the imaging. If the sensitivity is poor, the observed point will be overwhelmed by noise, and "invisible" will cause the most basic safety functions to not be guaranteed in the wild. At the same time, it is necessary to prevent ambiguity and accidental injury to teammates. Third, the third most important indicator is the detector pixel. “Do n’t be confused. The pixels of the detector and the eyepiece are two different things. Some businesses often confuse the two concepts.” The relatively high-end product pixels of the civilian infrared camera are 640 × 512, which are taken by this high-end infrared camera. Infrared pictures are clear and delicate, and objects of the size of a hare can be distinguished from 500 meters away; Fourth, the fourth important performance indicator: frame rate. Frame rate is the number of images processed by the camera in 1 second. The faster the sensor, the higher the internal circuit processing rate and the higher the frame rate. High frame rate thermal imagers are suitable for capturing high-speed movement of objects. The general television frame rate is 25Hz. Equipment used in outdoor viewing, monitoring of important areas, assisted driving of automobiles, medical treatment and other fields should use high frame rates. "The frame rate of a good thermal imaging camera should be 30Hz ~ 50Hz, otherwise it will not work in many occasions. The level of the frame frequency directly explains the performance of the thermal imaging camera and the response speed. Due to US government regulations, FLIR, etc. The thermal imaging camera products exported by the company are all below the low frame rate of 9Hz. "5. The fifth important performance indicator: pixel spacing. Uncooled infrared detectors have a pixel pitch from 45 microns, 35 microns to 25 microns, and 20 microns. The current mainstream products are already 17 microns, and products have begun to emerge at 14 microns. A smaller pixel pitch brings a more optimized optical system and lower power consumption, which also represents a higher technology level of the product. According to experts, in the field of uncooled infrared, 12 micron products have been successfully developed in China. 26. Some auxiliary indicators such as lens, spatial resolution, field of view, and identification distance.
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Contact：Martin
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