Journals >Electro-Optic Technology Application
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2021
Volume: 36 Issue 2
17 Article(s)
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Analysis of Military Application Prospect of Optical Frequency Micro-system
YANG Yi-ning, LIU Wan-cheng, WANG Kai, LIU Tong-yu... and LI Man|Show fewer author(s)
The continuous emergence of new materials, advanced integrated packaging technologies and new micro-architectures has prompted the development of equipment in the field of optoelectronics towards miniaturization, intelligence and integration. The performance and power consumption improvements brought by the micro-systeThe continuous emergence of new materials, advanced integrated packaging technologies and new micro-architectures has prompted the development of equipment in the field of optoelectronics towards miniaturization, intelligence and integration. The performance and power consumption improvements brought by the micro-systems make it possible to upgrade the equipment comprehensively and across generations, which has important military application prospects. The applications of micro-systems in the field of optoelectronics are focused on. The planning and development of various research institutions in semiconductor and optical frequency micro-systems at this stage are sorted out. Furthermore, the military application prospects of optical frequency micro-systems are forecasted..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 1 (2021)
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 1 (2021)
Research on Simulation and Model of Infrared Countermeasure at Home and Abroad
ZHANG Jing-yuan, ZHAO Fei-yu, WU Gang-gang, WANG Liang, and GUO Shu-chao
Simulation of infrared countermeasure is important to evaluate the jamming effects of infrared decoy, the anti-jamming capability and jamming strategies of infrared-guided missiles, and the tactics and combat plan of air combat. The accuracy of the simulation model has an important impact on the effectiveness and accurSimulation of infrared countermeasure is important to evaluate the jamming effects of infrared decoy, the anti-jamming capability and jamming strategies of infrared-guided missiles, and the tactics and combat plan of air combat. The accuracy of the simulation model has an important impact on the effectiveness and accuracy of the simulation system evaluation. The infrared countermeasure simulation system, infrared decoys and infrared-guided missile models at home and abroad are introduced, which provide some thoughts for the related researches of infrared countermeasures simulation system..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 5 (2021)
Research on Development of Airborne Imaging Spectrometer and Application of Environmental Protection
CUI Hong
The imaging spectrometer combines the advantages of spectrum technology and imaging technology, which can perform qualitative, quantitative, timing and positioning analysis and has the advantage of "spectrum in one". Combined with unmanned aerial vehicle (UAV) and manned aircraft, it can be used in many fieldThe imaging spectrometer combines the advantages of spectrum technology and imaging technology, which can perform qualitative, quantitative, timing and positioning analysis and has the advantage of "spectrum in one". Combined with unmanned aerial vehicle (UAV) and manned aircraft, it can be used in many fields, especially in the field of environmental protection. Taking the frontier technology and system as the breakthrough point, the development status of the airborne imaging spectrometers is introduced. And through practical application cases, the various applications of the spectrometer in environmental protection field are introduced. Finally, the development of the spectrometer is prospected..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 10 (2021)
Design of Optical over-the-horizon Visible Light Detection System
LIU Xiao-min, XING Lin, and ZHANG Sheng-qian
When entering over-the-horizon imaging, the light line reflected from the surface of the scene is attenuated by the scattering of suspended particles in the air, which results in a decrease in the image contrast. At the same time, the light line in the surrounding environment of the scene will also be scattered by suspWhen entering over-the-horizon imaging, the light line reflected from the surface of the scene is attenuated by the scattering of suspended particles in the air, which results in a decrease in the image contrast. At the same time, the light line in the surrounding environment of the scene will also be scattered by suspended particles in the air, and the scattered light line into the imaging equipment will lead to the color drift of the image. In addition, under certain conditions of visibility, as the imaging distance increases, the atmospheric transmittance of visible light decrease constantly, which reduces the energy reaching the detector and affects the imaging quality. Incorporated with the two methods of optical and electronic dehazing, imaging quality is enhanced, and working distance is increased, so over-the-horizon imaging is achieved..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 14 (2021)
Compact and Low Power Inter-satellite Laser Communication System
MENG Fan-bin, and WU Gang
According to the requirements of inter-satellite links under micro-satellite networking scene, a design method of low data rate inter-satellite laser communication system with the characteristics of compact and low power consumption is proposed. The developments of space laser communication at home and abroad are introAccording to the requirements of inter-satellite links under micro-satellite networking scene, a design method of low data rate inter-satellite laser communication system with the characteristics of compact and low power consumption is proposed. The developments of space laser communication at home and abroad are introduced. The design ideas, system composition, key design of parts and key component type of the system are imposed. And the feasibility of the links is analyzed..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 18 (2021)
Linewidth Characteristics of High-power Narrow Linewidth Fiber Laser
WU Yang, LIN Zhao-pei, WANG Rui, XING Mei-shu... and QI Wei|Show fewer author(s)
In order to achieve stable narrow linewidth and high-power laser output, an Er3+/Yb3+ co-doped narrow linewidth fiber laser based on cascade amplification is designed, its linewidth and stability are discussed in detail. The two-stage structure is adopted for amplifier to decrease the spontaneous emission noise of finaIn order to achieve stable narrow linewidth and high-power laser output, an Er3+/Yb3+ co-doped narrow linewidth fiber laser based on cascade amplification is designed, its linewidth and stability are discussed in detail. The two-stage structure is adopted for amplifier to decrease the spontaneous emission noise of final output, and the single clad Er3+ doped fiber is adopted for pre-amplifier as gain medium. The double clad Er3+/Yb3+ co-doped is adopted for the master amplifier. Experimental results show that the changes of stabilities for laser outputs cannot be monitored obvious clearly, while the laser is amplified by various amplifiers. However, due to the relaxation oscillation and the self-phase modulation which result by the intensity fluctuation of self-pulsation, the different levels of linewidth broadening are observed..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 25 (2021)
Research on Bulk Damage of K9 Glass Induced by Nanosecond Laser
ZHANG Dun-xiang, CHEN Shi-long, ZHOU Zhao-ming, ZHANG Fa-wang... and JIANG Yong|Show fewer author(s)
The characteristics and growth behavior of filamentation damage in K9 optical elements are researched by nanosecond laser with 1 064 nm and 355 nm. The results show that when the sample is irradiated with energy higher than the bulk damage threshold, the filamentous damage will be inevitably formed. The two kinds of laThe characteristics and growth behavior of filamentation damage in K9 optical elements are researched by nanosecond laser with 1 064 nm and 355 nm. The results show that when the sample is irradiated with energy higher than the bulk damage threshold, the filamentous damage will be inevitably formed. The two kinds of laser irradiation will firstly form plasma channel in K9 optical elements, under subsequent laser irradiation, the damage sites near the incident laser absorb more laser energy, developing into a larger nucleation damage points, and gradually grow to the front surface, which is accompanied by the longitudinal expansion of a large number of cracks. The difference is that there are many filamentous channels when 355 nm laser induces filamentous damage, while 1 064 nm laser does not observe very obvious filamentous damage even when it is irradiated by laser energy far greater than the initial damage threshold. At the same time, it is found that the damage growth area of filamentous damage induced by two wavelengths increases exponentially with the increasing of laser irradiation times, and the damage growth rate caused by 355 nm is faster than that of 1 064 nm..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 30 (2021)
Correction Technique for Gradient Distortion of Band Pass Filter
ZHANG Jin-bao, SHI Cheng-bo, GENG Hao, and GUO Hao-yu
The distortion of cut-off gradient is a difficult problem in the practical preparation of band pass filter. Through admittance matching optimal design between the equivalent refractive index of periodic film structure and the substrate, the regular structure of band pass filter film is obtained. Based on the analysis oThe distortion of cut-off gradient is a difficult problem in the practical preparation of band pass filter. Through admittance matching optimal design between the equivalent refractive index of periodic film structure and the substrate, the regular structure of band pass filter film is obtained. Based on the analysis of the variation of process parameters during the preparation of the film, it is proposed that the main reason for the gradient deformation is the error separation of the cut-off band caused by the change of the evaporation source characteristics of the electron gun. After correcting the error, a wide band-pass interference cut-off filter film with gradient change less than 25 nm is fabricated..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 35 (2021)
Dual-channel and Dual-gain Optimal Integration Time of CIS2521F
LIU Yan, CHEN Bing, ZHANG Jian, and CHEN Ya-cong
Taking the complementary metal oxide semiconductor (CMOS) sensor CIS2521F of Fairchild Company as an example, the optimal integration time in the latest high dynamic range (HDR) technology of dual-channel and dual-gain hardware is analyzed. By analyzing the relationship between the scene irradiance and the gray value oTaking the complementary metal oxide semiconductor (CMOS) sensor CIS2521F of Fairchild Company as an example, the optimal integration time in the latest high dynamic range (HDR) technology of dual-channel and dual-gain hardware is analyzed. By analyzing the relationship between the scene irradiance and the gray value of the dual-channel and dual-gain scene and the noise gray value respectively in different integration time in the space environment with noise, 1 ms is selected as the integration time of high and low gain. So the image will not be over exposed under high irradiance, and will not lose details due to noise under low irradiance. And the imaging dynamic range is up to 84.8 dB after the dual channel results fusion..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 40 (2021)
Research on Minimum Period Identification Technology of Guidance Laser Pseudo-random Code
WANG Tuo, and HE Wei
In order to effectively and quickly identify the coding pattern of the enemy′s guidance laser and provide a longer time for our interference preparations, the principle and pattern of the finite-bit pseudo-random code are analyzed and the minimum period identification method of the bit pseudo-random code is proposed. TIn order to effectively and quickly identify the coding pattern of the enemy′s guidance laser and provide a longer time for our interference preparations, the principle and pattern of the finite-bit pseudo-random code are analyzed and the minimum period identification method of the bit pseudo-random code is proposed. The more phase subtraction method is used to solve the minimum integer ratio, which improves the computational efficiency. The simulation verification results show that the method can effectively identify the minimum period of the finite-bit pseudo-random code. When the number of received pulse signals is 4, the recognition probability is close to or exceeds 95%, and it has nothing to do with the number of bits of the shift register. And the effectiveness of the method is verified..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 47 (2021)
Testing Design of CPU Module
TIAN Xiao-bo, TANG Yan, and YU Shui-you
The testing design of a central processing unit (CPU) module is described, which is used to check the function and performance of the module. During design process, at first, the function and performance of the CPU module are analyzed. And then, on this basis, the testing requirements are proposed, and the testing methThe testing design of a central processing unit (CPU) module is described, which is used to check the function and performance of the module. During design process, at first, the function and performance of the CPU module are analyzed. And then, on this basis, the testing requirements are proposed, and the testing methods are designed. At last, the function and performance of the CPU module are tested and verified through the testing method, which provides design and testing recommendations for designers..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 50 (2021)
Transient Interference Suppression Measures of Power Supply of Electro-optical Equipment
WANG Ji-yuan, WANG Xu-kang, and ZHANG Hua-wei
As the power supply core of a system, power supply systems often have to deal with all kinds of noise interference and electro-optical equipments have their own operation characteristics. How to take effective anti-interference measures to ensure equipments in stable and reliable operation state is worthy of discussionAs the power supply core of a system, power supply systems often have to deal with all kinds of noise interference and electro-optical equipments have their own operation characteristics. How to take effective anti-interference measures to ensure equipments in stable and reliable operation state is worthy of discussion and study in-depth. From practical application, combined with the electric characteristics of electro-optical equipments and practical application effect of anti-interference measures, the key contents to be concerned about of transient interference suppression measures of the power supply systems of electro-optical equipments are described..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 56 (2021)
Implementation and Design of AD Signal Acquisition Adaptive System Based on FPGA
ZHANG Ting-yu, and WANG Yu-lei
To meet the requirements of high precision, low delay and zero phase shift for detector analog signal acquisition, a field programmable gate array (FPGA)-based analogue digital (AD) signal acquisition adaptive system is designed. Incorporating with engineering application, the timing diagram and design flow chart of ADTo meet the requirements of high precision, low delay and zero phase shift for detector analog signal acquisition, a field programmable gate array (FPGA)-based analogue digital (AD) signal acquisition adaptive system is designed. Incorporating with engineering application, the timing diagram and design flow chart of AD signal acquisition are given. The control of AD9653 chip is realized by FPGA logic based on the Zynq-7000 series devices from XILINX Company. FPGA logic is used to realize the control of AD9653 chip, which can ensure that analog signal on each channel, the digital signal after AD conversion to the entire pathway of FPGA are not vary with the difference of the printed circuit board (PCB) layout and wiring. The signal on each channel can adapt after passing to the Select IO hardware logic resources in FPGA and ensure the accuracy of data acquisition..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 61 (2021)
Research on Passive Jamming Obscuring Characteristics of Jamming Rope and Patch
YU Qun, ZHANG Le, ZHANG Yi, and ZHAO Fei-yu
According to the scattering characteristic theory of radar surface scattering target, combined with domestic and overseas situations, a new type of radar passive jamming material based on the combination structure of jamming rope and patch is proposed, which can realize obscuring jamming to radar. Based on the researchAccording to the scattering characteristic theory of radar surface scattering target, combined with domestic and overseas situations, a new type of radar passive jamming material based on the combination structure of jamming rope and patch is proposed, which can realize obscuring jamming to radar. Based on the research on the scattering characteristics of surface scattering target, the jamming material structure with cubic shape is designed and the experimental research on the double-pass scattering attenuation characteristics of jamming material sample is performed. Theoretical simulation and experimental testing are used to provide theoretical and data support for the radar multi-band scattering attenuation characteristics of new radar passive jamming material based on the combination structure of jamming rope and patch..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 64 (2021)
Research on Measurement Method of Deformation Quantity of Artillery Parts Based on Laser Radar
ZHANG Xin-ting, and WU Qian-qian
According to some problems in measuring the deformation of artillery parts, such as complex structure, large geometric range and regular disassembly, a new method for measuring the deformation quantity of artillery parts is proposed. Laser radar and standard sphere measurement principles are used by the method and compAccording to some problems in measuring the deformation of artillery parts, such as complex structure, large geometric range and regular disassembly, a new method for measuring the deformation quantity of artillery parts is proposed. Laser radar and standard sphere measurement principles are used by the method and computer control in real time and data processing are performed. Experimental measurement of the artillery tube with 8 m length is carried out, the repeatability measurement accuracy is less than 0.13 mm, and the measurement accuracy can meet the measurement requirements of deformation quantity of artillery parts..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 70 (2021)
Research on Light Path Deviation of Two Axis Servo Turntable
ZHOU Qiang, LIU Zhe, and YANG Hai-peng
In a two-axis servo turntable, in order to improve the laser pointing accuracy after passing through the turntable, it is necessary to ensure the parallelism of the laser beam and the rotating axis of the turntable. By analyzing the relationship between the deviation and the laser pointing accuracy, the method of improIn a two-axis servo turntable, in order to improve the laser pointing accuracy after passing through the turntable, it is necessary to ensure the parallelism of the laser beam and the rotating axis of the turntable. By analyzing the relationship between the deviation and the laser pointing accuracy, the method of improving the accuracy is researched. The matrix solution method of the intersection of straight lines and planes in space and the theory of three-dimensional matrix transformation are introduced to solve the intersection of laser beam and mirror or projection screen in the static and dynamic state of the servo turntable. And then, according to the principle of light reflection, the general formula of coordinates on the projection screen is derived. By analyzing the general formula of the coordinates of the laser on the projection screen, the position and size of the deviation are analyzed. In the simulation experiment, the deviation is first assumed, the trajectory of the laser on the projection screen is calculated by simulation, and then the position and size of the deviation are calculated through the general formula, and the general formula is verified by comparing the deviation with the simulation assumption. At last, through laser irradiation experiment, the correctness of the position and size of the deviation calculated by general formula is verified. Therefore, according to the laser projection trajectory of the two-axis servo turntable, the derived general formula is used to calculate the position and size of the deviation, which provides a calculation basis for improving the parallelism of the laser beam and the rotating shaft, thereby, the laser pointing accuracy is improved..
Electro-Optic Technology Application
- Publication Date: Sep. 13, 2021
- Vol. 36, Issue 2, 74 (2021)
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