1. Introduction of sulfur halide materials

It is a kind of infrared material, which can be molded into infrared lens in large quantities. Its physical properties make it more and more widely used in infrared optical lens, and the price is relatively low

Infrared chalcogenide glass

2. Preparation and application of infrared chalcogenide glasses

Chalcogenide glass is a kind of oxygen-free infrared glass formed by s, Se, TE and other metal elements such as GE, GA, as, Sb in the periodic table. It has excellent refractive index temperature coefficient (dN / DT) performance and can be used in infrared imaging optical system as athermal optical element. In addition, the intrinsic characteristics of glass metastability can be used to obtain functional nanocrystalline composite glass ceramics, such as infrared frequency doubling, crystal field enhanced rare earth ion luminescence and infrared transparent nano porous structure. In this project, we will focus on the preparation of new large-size chalcogenide glass, precision molding and Application Research of new infrared optical system, nano crystallization mechanism of chalcogenide glass and preparation and performance of functional chalcogenide glass ceramics.Infrared chalcogenide glass

3. Preparation and application of infrared chalcogenide glass fiber

Chalcogenide glass fiber has high nonlinear coefficient, wide infrared transmission region and low phonon energy. It has important application prospects in mid infrared supercontinuum source, fiber laser and amplifier, Raman fiber laser, stimulated Brillouin fiber laser, fiber sensor and other fields. This project mainly focuses on the preparation of novel chalcogenide glass fiber, mainly involving the structure of step type and photonic crystal fiber, the research on the performance characteristics of fiber and the internal change law of the composition and structure of the matrix glass, the drawing process of low loss chalcogenide fiber, and the application in mid infrared supercontinuum source, Raman fiber laser and other fields.

Infrared chalcogenide glass

4. Preparation and application of infrared chalcogenide glass film

Chalcogenide glasses have excellent nonlinear quality factor, ultra fast nonlinear response time (< In addition, chalcogenide thin films have unique photosensitivity. This project will focus on the composition design and preparation control of chalcogenide glass films, the design and performance of thin film waveguides, the photosensitivity and photo induced change mechanism of chalcogenide glass films, the development of high-speed and high-density optical storage materials, and the development of photonic integrated chips.

6. Material advantages

Chalcogenide glasses have unique advantages as infrared lens materials. The processing efficiency of chalcogenide glass is high, and it can be accurately molded, which is more than 10 times higher than diamond turning, and the raw material cost is 1 / 3 of germanium single crystal. In the temperature adaptation, germanium single crystal is more "delicate", the temperature changes greatly, and the image is unstable. Chalcogenide glass can face a temperature difference of 110 ℃ from minus 40 ℃ to above 70 ℃ without pressure.

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Single crystal germanium wafer

1. Production introduction:

Our company provides you with high quality single crystal germanium production, single crystal germanium chip, etc., we have 5 professional and efficient single crystal furnace, we use the Czochralski method to produce single crystal germanium, with an annual output of 30 tons of germanium, fully guarantee your supply, welcome to inquire or purchase.

2.Introduction of single crystal germanium chip

As a common far-infrared material, it has good transmittance in the light transmission range of 2000Nm to 17000nm, and is opaque in the visible light band, so germanium is very suitable for infrared laser applications, and its refractive index is very high. It is an ideal choice for biomedical and military imaging applications. It is commonly used in infrared thermal system, laser applications, etc.

3. Application of single crystal germanium chip:

Semiconductor devices, infrared optical devices, solar cell substrates and other materials.

4. Processing method of single crystal germanium wafer

Single crystal germanium wafer is a kind of sheet single crystal germanium material which is cut and ground by multi wire cutting machine.


In recent years, stimulated by the strong demand for infrared optical and semiconductor materials, China's germanium production technology capacity has improved rapidly. At present, domestic enterprises have been able to produce optical fiber grade, infrared grade and solar grade germanium products.


At present, the main production methods of germanium single crystal are Czochralski method, horizontal Bridgman method and VGF method. Among them, Czochralski method is the most commonly used growth method of germanium single crystal, which has the advantages of visualization of growth process, high yield, high degree of automation of crystal growth, no contact between crystal and crucible, avoiding parasitic nucleation of crucible and other defects. But at the same time, the diameter of the crucible should be more than 2 times of the crystal diameter. Therefore, it is difficult to grow germanium single crystals with large size by Czochralski method. The horizontal Bridgman method has the advantages of fast crystal growth and low cost, but it is difficult to grow large size germanium single crystal because of the D-type crystal and low utilization. The crystal diameter of the VGF method is the same as that of the crucible. Theoretically, large size germanium single crystals can be grown. However, it is easy to form parasitic nucleation at the junction of crucible and crystal. In addition, the crystal grown by VGF method has concave interface, which is difficult to guarantee the yield of crystal.

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Germanium single crystal material

1. Production introduction

Our company provides you with high-quality germanium single crystal production , germanium single crystal chip and so on. We have five professional and efficient single crystal furnaces. We use the Czochralski method to produce single crystal germanium, with an annual output of 30 tons of germanium. We fully guarantee your supply. Welcome to inquire or purchase.

2. Introduction of germanium single crystal

Germanium is an important semiconductor material, which is used to manufacture transistors and various electronic devices. The annual consumption of germanium in the field of infrared optics accounts for 20-30% of the total consumption in all fields. Germanium is mainly used as the optical material of lens, prism, window and filter in infrared optical system.

3. Application of germanium single crystal

Germanium single crystal can be used as transistor and is the first generation of transistor material.

Germanium has been gradually replaced by silicon in the electronic industry.

However, due to the higher electron and hole mobility of germanium than silicon, germanium has better performance than silicon in high-speed switching circuits.

Germanium has new applications in infrared devices and gamma radiation detectors.

The application of germanium in infrared optics  is mainly used to manufacture infrared optics lens  and to protect the infrared optics window of the infrared optics lens. More than 60% of the middle and low-end infrared optical lenses are made of germanium single crystal, and 50% of the high-end infrared optical lenses are made of germanium single crystal. In the civil infrared lens, the single set of medium and small aperture lens consumes about 250g of germanium, and the large aperture lens consumes about 250g of germanium.

Military infrared window is mainly used in aircraft and armored vehicles, especially in helicopters. The application of infrared optical lens includes military application and civil use. In military, it is mainly used in airborne infrared lens, shipborne infrared lens, subgrade infrared lens, vehicle mounted infrared lens head, infrared gun aiming lens, helmet mounted infrared lens, handheld infrared lens, etc.

The civil infrared window is mainly used in various monitoring thermal imagers and night auxiliary pilot. The civil field is mainly used in security, civil vehicles, civil ships, civil aircraft, police and so on.

4. The production method of single crystal germanium is as follows

In recent years, stimulated by the strong demand for infrared optical and semiconductor materials, China's germanium production technology capacity has improved rapidly. At present, domestic enterprises have been able to produce optical fiber grade, infrared grade and solar grade germanium products.

At present, the growth methods of ge single crystal mainly include single crystal Czochralski method, horizontal Bridgman method and  VGF method. Among them, Czochralski method is the most commonly used growth method of germanium single crystal, which has the advantages of visualization of growth process, high yield, high degree of automation of crystal growth, no contact between crystal and crucible, avoiding parasitic nucleation of crucible and other defects. But at the same time, the diameter of the crucible should be more than 2 times of the crystal diameter. Therefore, it is difficult to grow germanium single crystals with large size by Czochralski method. The horizontal Bridgman method has the advantages of fast crystal growth and low cost, but it is difficult to grow large size germanium single crystal because of the D-type crystal and low utilization. The crystal diameter of the VGF method is the same as that of the crucible. Theoretically, large size germanium single crystals can be grown. However, it is easy to form parasitic nucleation at the junction of crucible and crystal. In addition, the crystal grown by VGF method has concave interface, which is difficult to guarantee the yield of crystal.

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The military night vision device has high definition and long distance

With the development of military night vision device, the requirement of its definition is higher and higher. So the second generation and above image adding tube are selected for military night vision device. At present, the first generation night vision device has not been purchased by the military. The first generation night vision device can not be selected by the military because it needs to use infrared transmitter in most cases. The military night vision devices purchased by the West and the United States in recent years have begun to purchase a large number of 3-generation and 4-generation night vision devices. Due to cost reasons, although the number of second-generation night vision devices purchased by the military is still the largest, the growth rate of generation 3 and generation 4 is very fast. The world's largest supplier of military night vision devices, such as olfa in Germany and RNO in the United States, are all supplied to the military. At present, the United States and the West prohibit the supply of 3-generation and 4-generation night vision devices to China, so there are no 3-generation and 4-generation night vision devices on the market in China.

military Night vision.png

However, in terms of effect, compared with the first generation night vision device, the second generation night vision device has a qualitative leap forward. However, there is no qualitative leap forward in generation 3 and generation 4 compared with generation 2. Generation 3 and generation 4 are more likely to solve the problems of edge twist and sharpness decline. Therefore, as both military and civilian, the second generation night vision device is actually a very good choice. The most popular models purchased by NATO and the United States are the Alfa S450 and g350 +. The former is a binocular and binocular night vision device, and the latter is a single tube night vision device. Of course, this model is not called in the military. The NATO code of olfa S450 is bs3506, and the NATO code of g350 + is sj5701. These two types have a very good reputation in the military, and have been widely used in recent NATO military operations, including the Kosovo war.

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What is the working principle of infrared explorer and how to use it in security field?

 Since Herschel discovered the infrared ray in the solar spectrum in 1800, the blackened mercury thermometer was the earliest infrared explorer. With the development of infrared experiment and theory, new equipment has been emerging. The preparation of infrared Explorer involves many subjects, such as physics, materials, chemistry, mechanics, microelectronics, computer and so on.

Because of its unique advantages, infrared exploration technology has been widely studied and used in military defense and civil fields, especially in the traction of military field demand and the promotion of related skills development, as a high-tech infrared exploration technology will be more widely used in the future, and its position will be more important.

The infrared detector works by detecting the infrared emitted by the human body. The Explorer collects the infrared radiation from the outside and gathers it on the infrared sensor. Pyroelectric element is usually used in infrared sensor. When the temperature is announced to change after receiving infrared radiation, the pyroelectric element will release electric charge and alarm after detection and processing.

The infrared detector is a kind of equipment which transforms the infrared radiation signal into electrical signal output. Infrared radiation is an electromagnetic wave whose wavelength is between visible light and microwave, which can not be detected by human eyes. To detect the existence of this radiation and measure its strength, it must be transformed into other physical quantities that can be detected and measured. Generally speaking, infrared radiation

Any effect caused by irradiating an object can be measured only by the action and is flexible enough to measure the intensity of infrared radiation. Modern infrared explorers mainly use infrared thermal effect and photoelectric effect. The output of these effects is mostly electricity, which may be converted into electricity by appropriate methods.