Journals >Electro-Optic Technology Application
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2021
Volume: 36 Issue 1
16 Article(s)
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Research Progress of Helical Phase Discotic Liquid Crystal
WEI Chen-hui, WANG Meng-fei, ZHAO Xin-yue, ZHANG Li-na, WANG Zheng-ran, FANG Yi, CHEN Yin-jie, WANG Jin-wei, ZHANG Mao-xin, WU Ti, ZHANG Wei-min, ZHANG Chun-xiu, and ZHANG Ao
The discotic liquid crystal is composed of a rigid aromatic core in the center and a number of flexible side chains linked externally. It is very easy for the disc-disc stacking to form a one-dimensional ordered columnar structure under the π-π interaction, which is beneficial to the carrier transport inside the columnThe discotic liquid crystal is composed of a rigid aromatic core in the center and a number of flexible side chains linked externally. It is very easy for the disc-disc stacking to form a one-dimensional ordered columnar structure under the π-π interaction, which is beneficial to the carrier transport inside the column, and the discotic liquid crystal can be expected to become an excellent semiconductor material in the future. Discotic liquid crystals are classified into ordered columnar, columnar plastic crystal and columnar spiral phases according to the order within the column. Among them, the columnar spiral phase has higher carrier mobility. Research on the design of the molecular structure, liquid crystal and photoelectric properties that can form helical phase discotic liquid crystal is of great significance to the development of new organic optoelectronic semiconductor materials..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 1 (2021)
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 1 (2021)
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 1 (2021)
Ability Analysis for Test and Evaluation of Construction System of Smoke Screen Jamming Environment
LI Yong-tao, Dong Hong-bo, LIAO Jun-bo, and YU Zhi-tong
Smoke screen jamming environment is an important part of battlefield environment construction in test and evaluation of photoelectric reconnaissance and guidance weapons. According to the requirements of smoke screen jamming environment construction in the test and evaluation of weapons and equipments, the ability elemSmoke screen jamming environment is an important part of battlefield environment construction in test and evaluation of photoelectric reconnaissance and guidance weapons. According to the requirements of smoke screen jamming environment construction in the test and evaluation of weapons and equipments, the ability elements of the smoke screen jamming system are analyzed, and the system composition and main characteristics are proposed. The feasibility of the using of portable gas-solid separation smoke cans and blower-type smoke generators in the test and evaluation of smoke screen is discussed in terms of environmental protection and supportability, which provides ideas and technical references for the ability construction of the smoke screen jamming environment in range test and evaluation..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 14 (2021)
Research on Detection System of Camouflage Net Breakage Based on Dual Spectrum Imaging
LI Xiao-long, LIU Li-wu, GUO Jie, LIU Chao-feng, and BAI Xue-qiang
According to the requirements of camouflage net breakage detection in testing ground, the harm of camouflage net breakage, detection principles, testing layouts and the statistics method of breakage parts based on image processing are analyzed and researched. And a detection system of camouflage net breakage based on dAccording to the requirements of camouflage net breakage detection in testing ground, the harm of camouflage net breakage, detection principles, testing layouts and the statistics method of breakage parts based on image processing are analyzed and researched. And a detection system of camouflage net breakage based on dual spectrum imaging is designed. Research results show that the system is reasonable in design, can be used for remote non-contact monitoring, can effectively detect the breakage states of camouflage net, which is used to evaluate and maintain the breaka ge states of camouflage net..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 19 (2021)
Research on Laser Deception Jamming Singal-Level Simulation
BI Xiang-li, YAN Xiu-sheng, SONG Yi-heng, GAO Wen-qing, ZHAO Ying-chao, and LIU Yan-yan
The technology principle of laser deception jamming is analyzed. The simulation platform of laser deception jamming signal-level is composed of a laser indication signal simulator, a laser seeker decoding simulator and a laser deception jamming processor. The designed seeker decoding simulator has multi-pulse identificThe technology principle of laser deception jamming is analyzed. The simulation platform of laser deception jamming signal-level is composed of a laser indication signal simulator, a laser seeker decoding simulator and a laser deception jamming processor. The designed seeker decoding simulator has multi-pulse identification ability in wave gate. The developed laser deception jamming processor has synchronous pulse bunch jamming signal output ability, which increases the difficulty of seeker decoding and improves the success rate of laser deception jamming. The effectiveness of a particular signal pattern of laser deception jamming is verified through signal-level simulation platform. The building of laser deception jamming signal-level simulation platform is important to deep research on laser deception jamming technology..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 24 (2021)
Design of Anti-resonant Fiber Polarization Beam Splitter in Terahertz Band
MA Rui, LIU Shuo, CHEN Hao-dong, and BAI Zhen-xu
Polarization beam splitter (PBS) is a very important optical component in the fields of optical sensing and integrated optics. Terahertz wave is considered as the carrier of large capacity wireless communication in the future. And the structure design of dual hollow-core anti-resonant fiber is more variable, there is nPolarization beam splitter (PBS) is a very important optical component in the fields of optical sensing and integrated optics. Terahertz wave is considered as the carrier of large capacity wireless communication in the future. And the structure design of dual hollow-core anti-resonant fiber is more variable, there is no strict requirement for cladding structure, and it can achieve higher performance to meet the needs of people's more diversity. Therefore, the design of PBS based on dual hollow-core anti-resonant fiber for terahertz band is more and more worthy of in-depth study. A dual hollow-core anti-resonance fiber based on cycloalkene polymer is proposed, further analysis and adjustment are carried out by changing the structural parameters of the optical fiber, on this basis, the PBS is designed and optimized. The structural parameters are as follows, the thickness of the inner cladding tube is 90 μm, the outer radius of the inner cladding tube is 335 μm, the inner radius of the outer tube is 2 000 μm, and the outer radius of the outer tube is 2 500 μm. And a PBS with the length of 119 cm, the ER of -24.831 3 dB and the bandwidth of about 2.2 μm is obtained..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 28 (2021)
Research on Characteristics of 2 μm band 7-cell Hollow Core Photonic Bandgap Fiber
ZHANG Ya-qi, LIU Shuo, and BAI Zhen-xu
Expanding transmission capacity has become the primary task for the development of modern optical communication technologies. The 2 μm band belongs to the human eye band and has an atmospheric communication window, which is an area in which optical communication systems need to be developed in the future. Compared withExpanding transmission capacity has become the primary task for the development of modern optical communication technologies. The 2 μm band belongs to the human eye band and has an atmospheric communication window, which is an area in which optical communication systems need to be developed in the future. Compared with quartz glass, soft glass material has a wider light transmission range and can be extended to the mid-infrared band, which is suitable for the 2 μm band optical communication system. Hollow core photonic bandgap Fiber (HC-PBGF) provides a unique light guide mode due to the existence of fiber bandgap. HC-PBGF has a flexible fiber structure, low loss and controllable dispersion characteristics. It is a very suitable transmission medium for optical communication. A 7-cell HC-PBGF is designed, and the characteristics of dispersion, mode field area, limiting loss and bending loss of the fiber are simulated and analyzed..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 34 (2021)
Preparation of Optical Film for Multi-band Protective Glasses
SHI Peng, WANG Li-rong, ZHANG Hong-jia, CAO Xiu-feng, JI Ming, ZHONG Ming-gui, and XU Guang-ming
Light in the ultraviolet, blue, and near-infrared bands is harmful to human eyes to a certain extent. Light in these bands exists in various photoelectric systems, and users need to wear protective glasses for protection. In order to achieve the protection of the above three bands at the same time, the protective and tLight in the ultraviolet, blue, and near-infrared bands is harmful to human eyes to a certain extent. Light in these bands exists in various photoelectric systems, and users need to wear protective glasses for protection. In order to achieve the protection of the above three bands at the same time, the protective and the antireflection film systems are designed through the film system design software, which is deposited by electron beam evaporation. The waterproof film is deposited on both sides of the lens by resistance evaporation. And the spectral and waterproof performances of the lens are tested. Testing results show that the developed coated lenses have an average transmittance of about 0.5%, 38%, 96% and 40% in the ultraviolet band of 250~360 nm, the blue band of 400~430 nm, the visible band of 500~780 nm and the near infrared band of 900~1 400 nm, respectively. The water drop angle can reach 113°, which can effectively reduce the damage of ultraviolet, blue and near infrared to human eyes, and the lens has low color cast, high visible light transmittance and good waterproof effect..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 39 (2021)
Research on Magnetic Fluid Magnetic Field Sensor Based on Optical Tamm State
GAO Jin-xia, FU Yao, ZHAO Hao-xu, and WU Ji-jiang
The sensing measurement of magnetic field has an important application in related fields. Using the magneto-optical effect of magnetic fluid, a magnetic field sensing structure based on optical Tamm state is proposed. The structure is composed of a one-dimensional magnetic fluid photonic crystal loaded with a metal layThe sensing measurement of magnetic field has an important application in related fields. Using the magneto-optical effect of magnetic fluid, a magnetic field sensing structure based on optical Tamm state is proposed. The structure is composed of a one-dimensional magnetic fluid photonic crystal loaded with a metal layer and a dielectric layer. The influence of the structure parameters on the sensing performance is studied numerically. The results show that the thicker is the magnetic fluid layer, the higher is the detection sensitivity. The thickness of the metal layer and the dielectric layer both have an optimal value, so that the sensor has higher detection accuracy. The results also show that the detection sensitivity of the proposed sensing structure is better than that of the reported magnetic field sensor realized by photonic crystal defect structure. The research results provide a reference for the design and fabrication of magnetic fluid magnetic field sensors based on optical Tamm state..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 43 (2021)
Research on Carrier Suppression Single Sideband Signal from IQ Modulator
WANG Xia, WEI Mu-ye, DENG Dong-feng, HE Feng, OUYANG Hong, YU Zhi-qiang, WU Ying, LI Wen-fu, YANG Qing-rui, and LI Peng-wei
Carrier suppressed single sideband (SSB) modulation is a special form of amplitude modulation, which can suppress the carrier and another side band to improve the frequency band utilization rate and increase the transmission capacity of optical fiber. The dispersion can be suppressed effectively and the transmission diCarrier suppressed single sideband (SSB) modulation is a special form of amplitude modulation, which can suppress the carrier and another side band to improve the frequency band utilization rate and increase the transmission capacity of optical fiber. The dispersion can be suppressed effectively and the transmission distance of the signal can be extended. So it is widely used in long distance high frequency microwave radio over fiber (ROF) system. The principle of using commercial LiNbO3 modulator to generate carrier suppressed SSB signals is analyzed in detail, and based on this, a testing system is built to generate carrier suppressed SSB signals of order ±1 respectively, +1 for long wave direction and -1 for short wave direction..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 47 (2021)
Multi-directional Infrared Focal Plane Array Blind Element Detection Method
LIU Yu-ting, LI Bing-han, and JIU Rui-bo
Based on the field of infrared image processing technology, a multi-directional infrared focal plane array blind element detection method is proposed. At first, the cross-directional one-dimensional operator is used to calculate the maximum and minimum values of the point at horizontal and vertical directions. And thenBased on the field of infrared image processing technology, a multi-directional infrared focal plane array blind element detection method is proposed. At first, the cross-directional one-dimensional operator is used to calculate the maximum and minimum values of the point at horizontal and vertical directions. And then, the maximum and minimum values of the point at diagonal direction are calculated by the diagonal one-dimensional operator. The maximum and minimum values of the crosswise and diagonal one-dimensional operators are used to obtain the maximum and minimum values of the point at two-dimensional direction. At last, whether the point is a blind point or not is judged by a threshold. A single blind cell is not only accurately detected, but also two or more blind cells can be accurately detected, which are continuous at horizontal, vertical or diagonal directions. The required storage cost is low, the calculation is simple, and it has good generalization and portability. This function can be realized by adding corresponding code in the software without additional hardware cost, greatly reducing the difficulty of development and shortening the development cycle..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 55 (2021)
Research on Rapid Detection of Flammable Liquid Based on Raman Spectroscopy Technology
LIU Qian-ying, HE Peng-fei, FENG Wei-wei, YANG Si-jie, CAI Zong-qi, and WANG Huan-qing
As a kind of molecular fingerprint spectrum, Raman spectroscopy can perform qualitative analysis of substances based on the vibration between the molecules of substances, and is widely used in many fields. Raman spectroscopy can be applied to portable monitoring systems, but the amount of data is too large. If the dataAs a kind of molecular fingerprint spectrum, Raman spectroscopy can perform qualitative analysis of substances based on the vibration between the molecules of substances, and is widely used in many fields. Raman spectroscopy can be applied to portable monitoring systems, but the amount of data is too large. If the data is not processed, it will greatly increase the subsequent analysis time and affect the speed of automatic identification. Nine common flammable liquids such as 90#, 93# and 97# gasoline, acetone, xylene, methanol, ethanol, ethylene glycol and tert-butanol are selected, data preprocessing analysis is performed on them, and the characteristic peak extraction effect is significantly, the data is compressed by 512 points, and then the support vector machine (SVM) and the random forest (RF) classification algorithms are selected for model training. Research results show that the cross-validation accuracy of the RF algorithm for identifying combustible liquid samples is higher than that of the SVM algorithm, and the mean square error results of the RF algorithm are also better than that of the SVM algorithm. The use of Raman spectroscopy technology can clearly detect the peaks of combustible liquid samples, and compress the data to increase the analysis speed, which can provide technical references for subsequent instrument miniaturization..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 58 (2021)
Method for Measuring Carrier Mobility of Organic Optoelectronic Materials
ZHAO Xin-yue, LIAO Rui-juan, WANG Meng-fei, WEI Chen-hui, WANG Zheng-ran, ZHANG Li-na, FANG Yi, CHEN Yin-jie, WANG Jin-wei, ZHANG Mao-xin, WU Ti, ZHANG Wei-min, ZHANG Chun-xiu, ZHANG Ao, and ZHANG Gui-jie
Organic optoelectronic materials can be generally divided into two types such as small molecules or oligomers and polymers. Charge carrier mobility is an important parameter to evaluate the electrical conductivity of organic optoelectronic materials, which is directly related to the charge transport property. ThereforeOrganic optoelectronic materials can be generally divided into two types such as small molecules or oligomers and polymers. Charge carrier mobility is an important parameter to evaluate the electrical conductivity of organic optoelectronic materials, which is directly related to the charge transport property. Therefore, the measurement of charge carrier mobility is one of the basic tasks in studies of organic optoelectronic materials. Through the summary and analysis of several different testing methods, the testing technology of several charge carrier mobility is reported, and the applicable principles of the testing methods and applicable testing ranges are pointed to. It is of great significance to study the charge carrier transmission in organic optoelectronic materials and the performance of organic optoelectronic devices..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 64 (2021)
Research on Modeling Method of Electro-optical Information System Based on Agent
KONG Xiao-ling, WANG Kai, and CHEN Hai-xia
According to the modeling requirements of electro-optical information systems in joint operations, agent modeling technology is researched, and the agent-based model of the electro-optical information system is built. At first, the composition and function flow of the agent-based electro-optical information system are According to the modeling requirements of electro-optical information systems in joint operations, agent modeling technology is researched, and the agent-based model of the electro-optical information system is built. At first, the composition and function flow of the agent-based electro-optical information system are analyzed. And then, a modeling method based on function modeling and driven by rule data is proposed, and the general framework of the model is given, and the design method of the engagement rule base is discussed. At last, the modeling process of the agent-based electro-optical information system is described from two aspects of model structure design and attributes behavior modeling, and the attribute model and behavior model are established by the object-oriented method. The electro-optical information system modeling based on agent is realized..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 71 (2021)
Structure Design of New Reflection Beam Expanding System
LIU Ye-lei, and ZHAO Zi-xing
In view of laser systems, a new laser beam expanding system is researched, which adopts an off-axis reflection optical system. For beam expanding equipments requiring high precision and stability, the accuracy of the system is ensured to less than 0.02 mm through material selection, opto-mechanical structure design, riIn view of laser systems, a new laser beam expanding system is researched, which adopts an off-axis reflection optical system. For beam expanding equipments requiring high precision and stability, the accuracy of the system is ensured to less than 0.02 mm through material selection, opto-mechanical structure design, rigid design and simulation analysis calculation. For multi-axis debugging being required by beam expanding equipments, a multi-degree of freedom adjusting mechanism is designed to realize three axis rotation and translation. The results show that the design of system structure is rational and meet the requirements of the beam expanding system..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 36, Issue 1, 76 (2021)
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