In order to solve the problem that the efficiency of chaff jamming pulse Doppler (PD) radar seeker is reduced due to the excessive Doppler frequency difference between chaff and target aircraft under some countermeasure situations, active and passive cooperative jamming mode is adopted to make chaff cloud have Doppler frequency characteristics similar to that of the target aircraft. Based on the principle of active and passive cooperative jamming, the influence factors of active irradiation signal modulation frequency are researched to give the frequency modulation law of the signal under different attack situations of missiles.

Micro-system technology is an advanced comprehensive technology which is supported by micro-nano theory and based on micro-integration method. Through the integration of functional modules, the micro-system technology can achieve single or multi-purpose micro systems. The application of the technology is of great significance to accelerate the overall improvement of the electro-optical system performance and meanwhile reduce the cost effectively. Based on the key technology progress in the field of micro-system in 2019, the current difficult problems are discussed, which provides references for researchers in this field.

At first, the development of the typical directed infrared countermeasure (DIRCM) systems in America such as system composition, improvement, upgrade and equipment platform is introduced. And then, the equipment deployment, development and improvement of the system are discussed and analyzed. At last, the development trend of DIRCM equipment in America is discussed.

Metal oxide semiconductor gas sensor has attracted widely because of its high sensitivity, low manufacturing cost and simple measurement, which has great utilization potentiality in the aspect of the detection of toxic and harmful gases. Doping, as one of the most commonly used for modification method in the preparation process, has been paid lots of attention and researched wildly by domestic and international scholars. Therefore, the research progress of metal oxide semiconductor gas sensing materials is reviewed from the perspectives of doping, such as pure metal oxide, pure metal doping, rare earth element doping, composite metal oxide, metal oxide doping and so on. Furthermore, the problems and the developing tendency are summarized.

The proposed segmented planar imaging detector for electro-optical reconnaissance (SPIDER), which is based on interference imaging theory, provides a new solution for improving the resolution and reducing the size, weight and power (SWaP)of the optical system. In order to improve the quality of reconstructed images, the interference baseline of the system should be designed to improve the uniformity of spatial frequency coverage, which can avoid the frequency shortage of spatial sampling. In order to solve the problem of aperture matching, a design method of baseline array with high uniformity UV coverage is proposed. Based on the radial arrangement, the low and high frequency baselines are optimized respectively by calculating the cutoff frequency of low frequency. This design method can achieve the UV coverage result with high uniformity and low redundancy, and improve the reconstructed image quality effectively.

As an oxidant, polytetrafluoroethylene has better thermal stability, anti-aging performance, chemical stability, higher energy and releases huge amount of heat while reacting with metal powder. Meanwhile, polytetrafluoroethylene has good moldability when being applied in energetic materials such as pyrotechnics, therefore, it has wide application in pyrotechnics and new energetic materials. The application research of polytetrafluoroethylene in pyrotechnics and new energetic materials is introduced to provide references for wider and more in-depth research on the application of polytetrafluoroethylene in energetic materials.

Spin-valley property of two-dimensional transition metal dichalcogenides is an international hot topic in recent years. The transition metal dichalcogenides material and the unique spin-valley property of heterostructures are introduced. And the applications of the spin-valley property in optoelectronic devices are forecasted.

Single layer MoS2 is a two-dimensional direct band gap semiconductor material with a band gap of 1.8 eV, which can be used to develop new nano electronic and photoelectric functional devices. Because the vacancy in semiconductor can capture charge carrier and local exciton and form scattering center, which greatly affects the transport and optical properties of its main materials, the theoretical basis and numerical calculation algorithm of the first principle method are mainly used to study the influence of the original vacancy on the optical properties and saturated absorption of single layer MoS2. The presence of sulfur vacancy in the band gap results in a localized intermediate state, which leads to a significant red shift in the position of optical absorption peak and a strong absorption in visible light. Through the combination of figure and graphic, the absorption mechanism of the defect modulation can be understood well, which provides a deep guidance for the preparation of two-dimensional optoelectronic devices.

At present, all-silicon photoelectric biosensors based on silicon-based light sources and compatible with complementary metal oxide semiconductor (CMOS) technology have low luminous efficiency of the light source, resulting in low detection sensitivity, and cannot be applied on a large scale. In response to this problem, the polysilicon PN junction cascade light source and a new all-silicon photoelectric biosensor are researched, including the luminescence mechanism of the PN junction cascade polysilicon light source, waveguide transmission mechanism and waveguide biological detection technology. The developed polysilicon PN junction cascade light source has a luminous efficiency of 4.3×10-6, which can be efficiently coupled with a waveguide. Simulation results show that when the refractive index of the medium in the detection area of the waveguide changes between 1.33 and 1.73, the increase in the refractive index of the medium makes the light energy less return to the inner core of the waveguide, so the transmitted light intensity in the inner core of the waveguide decreases with the increasing in the refractive index of the medium. And medium refractive index sensing is realized through the changing of light intensity.

The bandwidth and signal-to-noise ratio must be confirmed while analyzing the detecting range of an IR imaging detecting system. Bandwidth and signal-to-noise ratio are related to material of detector, readout circuit, frame frequency, integration time and processing algorithm. Bandwidth and signal-to-noise ratio of infrared imaging system is analyzed. The effect of bandwidth and signal-to-noise ratio upon operating range is proposed.

The detection of horizon plays a significant role on the system of infrared dim small target detection on images with complex scenes. The deep learning semantic segmentation method is proposed to utilize in horizon detection task. Different from the traditional threshold segmentation method based on manual template, deep learning method digs the spatial information and semantic information of infrared images and has better adaptability. A new method is proposed to utilize the Deeplab-v3+ as the semantic segmentation arithmetic to distinguish sky and ground. The experimental results of scenes with city, forest and mountain show that the proposed method can effectively detect the horizon and demonstrate the superiority robustness of the proposed approach.

After tens of millions of years of natural evolution, humans have formed a law of life based on sunlight. If a person stays in a constant single-color lighting environment for a long period of time, it is easy to produce physical and psychological discomforts such as boredom, fatigue, drowsiness, depression, depression, etc., resulting in decreased attention, slow response and increasing error rate. Professional cognitive function causes certain damage. Artificial lighting shall rely on intelligent systems to establish a light and comfortable environment in the indoor space, which can reduce staff fatigue and improve work efficiency.

A hardware-in-the-loop simulation system for laser jamming in the combat process of imaging guided weapons is established by using the method of accessing the circuit of electro-optical jamming equipments and imaging guidance weapons. The composition, function and principle of hardware-in-the-loop simulation system for laser imaging guided weapon are introduced in detail, the compensation time is determined by matching miss distance, and delay compensation is performed. The difficulties of timing inconsistency and physical delay are solved, and the key technology of hardware-in-the-loop simulation system design is summed up. The system can perform research on hardware-in-the-loop simulation system, and detect the jamming efficiency of laser signals to the imaging weapon system. And the advantages and development of the hardware-in-the-loop simulation system design are pointed out.

Research on the time and space distribution of laser beam on target is an important step of laser effect analysis. A method is designed to identify the touching points of laser beam on target using imaging simulation. In the method, the laser beam and targets are modeled, the field of view is determined according to the characteristics of the laser beam, and the distribution of the light spot is determined by simulating the imaging process, including project coordinate converting, visibility culling, edge selecting of projection surface, projection point indexing calculation and pixel padding. The method and the dynamic setting of the scene are used to determine the time and space distribution of laser beam on target, which provides important support to laser effect analysis.