Foreign media: China's infrared system can detect 300 kilometers of hidden fighters, and the J-20 can use it to detect B-2

After the emergence of stealth fighters and stealth bombers, anti -stealth operations have become a key technology for the air force development of various countries. In the case of stealth fighter constantly reducing its radar reflection section (RCS), using infrared systems to search for the infrared optical characteristics of stealth fighters has also become an effective reflective method. The Indian "Eurasian Times" quoted the relevant reports of the South China Morning Post and reported the latest infrared search and tracking system in China.

The Indian media said that the Chinese military -related enterprise Sichuan Jiuzhou Electric Group published a paper in the Chinese journal "Infrared and Laser Engineering", saying that its infrared search and tracking system can be 285 kilometers (the title of the article is called 300 kilometers, but only among the content, but only in the content The infrared source of the aircraft was accurately detected at a distance of 285 kilometers). Optical engineer Liu Zhihui said that the infrared search and tracking system can identify the outline, wings, tails and engines of the target from infrared spectrum images. In addition, in addition to the infrared optical features that can search for aircraft, this infrared search and tracking system can also actively emit laser beams to illuminate the target to collect more detailed target information, such as the number of windows on the target aircraft.

The most important thing is that the volume of this infrared search and tracking system is not large and can be easily installed on cars, airplanes and even satellites. It can be used to build a monitoring and early warning system, but also to provide corresponding guidance services for missiles.

India media said that with the increase in the number of equipment in the fifth -generation stealth fighter and the expansion of the scope of equipment, infrared search and tracking system (IRST) gradually became the equipment that was urgently needed by some fighters. Although the fifth -generation stealth fighter has only a small radar reflection section (RCS), IRST mainly tracks the target through the high temperature generated by the engine tail flames and fighters and air.

Although some fifth-generation stealth fighters, such as the US F-22 stealth fighter, choose to reduce its infrared optical characteristics by equipping a new "mirror coating", it still cannot escape the detection and locking of IRST. In addition, IRST's working mode is passive, which means that the fighter equipped with IRST can fight with the fifth -generation stealth fighter with the fifth -generation stealth fighter when turning off the airborne radar, reducing the probability of being discovered and locked by the fifth -generation stealth fighter.

The Indian media said that "Global Flight" has been reported as early as 2015 that the Chinese J-20 stealth fighter has been equipped with an IRST system. 22 The detection distance of stealth fighter is 110 kilometers. If this latest infrared search and tracking system on the Chinese J-20 stealth fighter is equipped, the detection distance of B-2 stealth strategic bomber and F-22 stealth fighter can be farther.

Especially the B-2 stealth strategic bomber, the safety of its entire machine depends on the stealth advantage brought by its flying wing layout. s attack. Once the J-20 stealth fighter was found through infrared search and tracking system, then the B-2 stealth bomber is almost a dead end without any hope of escape.

Optoelectronics engineer Liu Zhihui said in the paper that it is very difficult to increase the role of infrared search and tracking systems. Because only a few photons can be captured by the observation lens of infrared systems. Their solution is to use a single photon detector (SPD), which can accurately detect and observe a single photon.

The Indian media said that although the Chinese research team did not mention the specific information of SPD. However, China has always been the world's leader in this field. In 2016, the "Mozi" satellite launched by China in 2016 was equipped with the most sensitive SPD at that time, and this achieved space quantum communication.

Engineer Liu Zhihui also stated in the paper that even if the detection distance of the system has increased, how to capture the infrared characteristics of fast exercise goals is still a very difficult problem. Because infrared radar must scan the sky for a long time to capture the weak signal of the long -distance target, the infrared signal left by the high -speed movement target is very weak and vague. In the end, they were installed in the system with a mirror that can rotate quickly to accurately automatically adjust the beam to eliminate this blur.

Currently. This system can search for a considerable large airspace within a few seconds. This scanning efficiency has far exceeded most of the world's infrared search and tracking systems. In addition, the environmental adaptation ability of the entire system is good. It can still work normally in an environment from minus 40 degrees Celsius to zero 60 degrees Celsius, capturing the corresponding infrared goals.

Indian media said that this is not the only latest achievement in this field. The Institute of Changchun Optics Machinery and Physics of the Chinese Academy of Sciences has previously developed a long -range infrared radar, which is reported that it can detect the infrared hot signal of modern aircraft at a distance of 225 kilometers. Even on a clear night, the system can observe an international space station more than 1,000 kilometers away.

Indian media's expression in some aspects does meet the current fifth-generation stealth fighter. For example, the AN/ASQ-239 electronic warfare system equipped by the US F-35 stealth fighter has a strong passive detection function. The radar -emitted radar wave reversed the specific location of the radar launch source and launched a counter -attack. But if the J-20 stealth fighter selects the airborne fire control radar, and then use the EOTS and EODAS to lock and attack the infrared optical features of the F-35 stealth fighter, then the F-35 stealth fighter will not know the J-20 Where did the stealth fighter attack? If the Chinese new infrared search and tracking system reported by the Indian media this time really has a detection distance of about 285 kilometers and can be integrated to the J-20 stealth fighter, it will greatly improve Counter -counter ability of combat aircraft groups. Of course, in addition to the stealth fighter such as the J-20 and J-35, the non-service bombardment-20 stealth bomber can also be equipped with this infrared search and tracking system to actively detect the dangerous goals when performing the task, and conduct advance in advance avoid.

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