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Series reports on anti epidemic materials (3): special glass with black Technology


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Since the outbreak of Xinguan pneumonia, China National Building Materials Group has taken the responsibility of the central enterprise and made full use of its advantages in materials. It has provided high-quality building materials for 72 hospitals in 19 provinces and cities. It has also vigorously supported more than 10 kinds of new materials for the front line of anti epidemic. It has really played a central enterprise role in supporting beams and pillars at the critical moment. It has been praised and felt by the leading group of Xinguan epidemic prevention and control of the state owned assets supervision and Administration Commission of the State Council Thank you.

Xiaoliao has opened a special column to take you one by one to understand the effects and functions of high-quality building materials and more than 10 kinds of new materials in the special environment of the anti epidemic front line. Today, I would like to introduce to you the "black technology" developed by China National Building Materials Institute.

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01 "eye of fire" to measure body temperature

Abnormal body temperature is one of the symptoms of patients with new coronal pneumonia. Rapid measurement of body temperature is one of the necessary links in epidemic prevention and control. The infrared lens based on chalcogenide glass developed by China Building Materials General Institute affiliated to China Building Materials Group is the "golden eye" of infrared thermometer. It uses 8 ~ 12 μ m infrared chalcogenide glass with high transmittance as the lens, which can quickly and accurately measure human body temperature. The temperature measurement range is - 20 ℃ to + 120 ℃, and the temperature measurement accuracy reaches ± 0.3 ℃.

Infrared lens coating production line

At the beginning of the outbreak of the epidemic, the production capacity of infrared lens in China was seriously insufficient, especially in Beijing. Only China National Building Materials Institute affiliated to China building materials group was engaged in the production of chalcogenide glass.

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Since the outbreak of the epidemic, China National Building Materials Institute has delivered more than 2000 sets of infrared lenses for the first-line epidemic prevention, and delivered more than 10000 pieces of chalcogenide glass materials to downstream customers, which were applied to the first-line epidemic screening of Wuhan Union Medical College Hospital, Guangzhou Baiyun Airport, Chengdu East Railway Station and North railway station.


02. Large use of special glass

Chalcogenide glass is a kind of special glass material, which is mainly composed of one or several chalcogenide elements s, Se and te. It has high transmittance in the infrared band of 8 ~ 12 μ m, but very low in the visible light band, so it looks black all over the body, so it is called "black technology".

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Long wave infrared chalcogenide glass

As the "golden eye" of infrared temperature measurement equipment, the optical system based on chalcogenide glass is used in the front end of the infrared temperature measurement equipment. The infrared energy radiated by the invisible target object is gathered, focused on the photoelectric detector, and converted into the corresponding electrical signal. After the circuit operation and processing circuit, it is converted into the linear temperature signal of the measured target To realize further signal processing and control.

Chalcogenide glass is regarded as the core material of new generation temperature adaptive infrared thermal imaging system. It has broad application prospects in the fields of civil vehicle night vision, security monitoring, fire rescue, power detection, intelligent consumption, interstellar life detection and other cutting-edge infrared thermal imaging optical systems.

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Infrared lens

Especially in the epidemic prevention and control, the infrared temperature measurement equipment based on the principle of infrared thermal imaging technology can detect the body temperature of the people who have passed the examination in the crowded area. It does not need close contact, and can screen the past population accurately and efficiently only at a distance of 3-4 meters. The temperature difference is detected by the thermal imager, and the temperature difference is converted into real-time video images When the body temperature is high, alarm immediately, quickly and safely identify the fever crowd.
With the advantages of fast response, non-contact, safety and long service life, infrared temperature measurement equipment has become an important auxiliary equipment for epidemic prevention and control. It is widely used in airports, ports, subways, stations, wharves, hospitals, residential areas, enterprises and institutions with dense flow of people. It is used for rapid screening of people with abnormal body temperature and preventing cross infection Stand guard.