Journals >Electro-Optic Technology Application
Contents
2012
Volume: 27 Issue 3
21 Article(s)
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Research Article
Opto-electronic Countermeasure Technologies and Their Development
LIU Song-Tao, and GAO Dong-Hua
The opto-electronic countermeasure is an important part of the electronic countermeasure. With the fast development of military opto-electronic equipments, the status of opto-electronic countermeasure becomes higher and its influence is more prominent. Firstly, the system of the opto-electronic countermeasure is discusThe opto-electronic countermeasure is an important part of the electronic countermeasure. With the fast development of military opto-electronic equipments, the status of opto-electronic countermeasure becomes higher and its influence is more prominent. Firstly, the system of the opto-electronic countermeasure is discussed from the opto-electronic reconnaissance, opto-electronic jamming, opto-electronic anti-reconnaissance and opto-electronic anti-jamming. Then, combining the technology development with the typical battle, the development history of the opto-electronic countermeasure is introduced from the visible countermeasure, infrared countermeasure and laser countermeasure. Finally, the research focus and future trends in the field of opto-electronic countermeasure are summarized comprehensively. The research results are helpful for understanding and grasping the opto-electronic countermeasure technologies..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 1 (2012)
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 1 (2012)
Design of Temperature Control System of Semiconductor Laser Based on MSP430F449
ZHANG Yue-ling, YANG Shao-yan, and ZHANG Xiao-juan
To overcome the shortcomings such as big volume, big noise and limited control precision of the traditional temperature control system of the semiconductor laser, a temperature control system of the semiconductor laser is developed based on the MSP430F449 single chip and DS18B20 digital temperature sensor. In the systeTo overcome the shortcomings such as big volume, big noise and limited control precision of the traditional temperature control system of the semiconductor laser, a temperature control system of the semiconductor laser is developed based on the MSP430F449 single chip and DS18B20 digital temperature sensor. In the system, the drive current is controlled by using PWM pulse width modulation and combining with PID algorithm, so the constant temperature of the laser is controlled. The experiment results show that the temperature control precision of the system is better than ±0.1 ℃, and steady temperature condition can be offered for the semiconductor laser..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 10 (2012)
Control Method of Hardware-in-the-loop Simulation System Based on Real-time Network
MA Sheng-xian, KONG Xiao-ling, WANG Li-xin, and JIA Cheng-gong
According to the principle of the hardware-in-the-loop simulation system based on the real-time network, the platform of the simulation system is constructed. The working process of the hardware-in-the-loop simulation system based on the real-time network is described, the function and control method of the every modulAccording to the principle of the hardware-in-the-loop simulation system based on the real-time network, the platform of the simulation system is constructed. The working process of the hardware-in-the-loop simulation system based on the real-time network is described, the function and control method of the every module of the system are introduced, and the superiority of the method based on the read-time network is also analyzed. The source code under the windows platform is given..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 14 (2012)
Design of Measurement and Control System for Ultraviolet Radiometer Based on ARM
SUN Jian
The working principle and application fields of the ultraviolet radiometer are expounded. Aiming at the work requirements which can be used easily and quickly, the design method of the measurement and control system for the ultraviolet radiometer based on ARM processor LPC2148 is introduced，the hardware and software ofThe working principle and application fields of the ultraviolet radiometer are expounded. Aiming at the work requirements which can be used easily and quickly, the design method of the measurement and control system for the ultraviolet radiometer based on ARM processor LPC2148 is introduced，the hardware and software of this system are designed. In the system debugging，the validity of the measurement and control system for the ultraviolet radiometer are validated by combining with the changeable energy ultraviolet source. Based on ARM processor, the hardware interface is simple and the software programming is easy, which can meet the work requirements of ultraviolet radiometer..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 18 (2012)
Structure Design of Shafting Fast Steering Mirror with Flexible Bearing
YIN Tie
The fast steering mirror is an important optical component of adaptive optics, the structure properties of shafting fast steering mirror and no-shafting fast steering mirror are compared, the difference working and application characteristics are analyzed, a new structure of fast steering mirror is designed on this basThe fast steering mirror is an important optical component of adaptive optics, the structure properties of shafting fast steering mirror and no-shafting fast steering mirror are compared, the difference working and application characteristics are analyzed, a new structure of fast steering mirror is designed on this basis. The flexible bearing has the characteristics of no friction and big angle, the shafting uses these characteristics. The applicable parameters are proposed and the relative flexible bearing is selected by analyzing and calculating. The design combines the advantages of shafting fast steering mirror and no-shafting fast steering mirror, a structure of the fast steering mirror which has a development prospect is proposed..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 22 (2012)
Design of Stabilized Loop for High Precision Gyro-stabilized Platform
WANG Jin, and WANG Kai
The working principle of the two-axis gyro-stabilized platform for isolating the carrier disturbance is introduced. The mathematical model is analyzed and designed for the stabilized loop of the gyro-stabilized platform. A dual rate-loop control structure is chosen, so the servo system has the better anti-jamming abiliThe working principle of the two-axis gyro-stabilized platform for isolating the carrier disturbance is introduced. The mathematical model is analyzed and designed for the stabilized loop of the gyro-stabilized platform. A dual rate-loop control structure is chosen, so the servo system has the better anti-jamming ability and robustness than the single rate-loop control structure. The experimental data from the prototype show that this gyro-stabilized platform has a better stabilized precision..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 26 (2012)
Photon Detection Technology Based on SPM
HU Tao, and LIU Yan-yan
The photon detection technology is a hot area in the low light detection. The working principle, basic structure and performance characteristics of SPM (silicon photo multipliers) detector are introduced, in order to verify the photon detection performance and photon resolution ability of SPM detector, SPM photon detecThe photon detection technology is a hot area in the low light detection. The working principle, basic structure and performance characteristics of SPM (silicon photo multipliers) detector are introduced, in order to verify the photon detection performance and photon resolution ability of SPM detector, SPM photon detection circuit using high speed transconducance amplifier is designed, and the photon detection experiment is studied. The experimental results show that SPM detector has a better photon resolution property..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 30 (2012)
Target Detection Based on Visual Saliency Image
HE Hu, LIU Wei, and ZHANG Jian
According to the visual mechanism of the human, the implementing method and the visual model of the visual saliency for the computer are introduced from the direction, brightness and color. This visual model can be used for the target detection by combining with the artificial and natural methods. The background imagesAccording to the visual mechanism of the human, the implementing method and the visual model of the visual saliency for the computer are introduced from the direction, brightness and color. This visual model can be used for the target detection by combining with the artificial and natural methods. The background images of the vehicles in the database are observed. The experiment shows that in 75% of the images, the computer model detects the target faster than the human, and this model is more suitable for detecting the obvious target..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 33 (2012)
Noise Analysis of Opto-electronic Detection Amplifier
ZHANG Zheng-mao, and CHEN Feng
The complex noise features of the opto-electronic detection amplifier are analyzed. The characteristics of the feedback resistance noise, input voltage noise and current noise from the opto-electronic detection amplifier are studied. The calculation method of the output voltage noise is obtained by analyzing the bode dThe complex noise features of the opto-electronic detection amplifier are analyzed. The characteristics of the feedback resistance noise, input voltage noise and current noise from the opto-electronic detection amplifier are studied. The calculation method of the output voltage noise is obtained by analyzing the bode diagram of the amplifier circuit and spectrum characteristic. Combining the specific circuit, the principle of the low noise opto-electronic detection circuit is summarized by calculating the current, resistance and voltage noise..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 37 (2012)
Principle and Error Analysis of Dual-grating Interference Displacement Sensor
ZHANG Jin-hua, CHEN Liang-zhou, and LIU Xiao-jun
The displacement sensor based on the principle of double diffraction grating interference has many advantages, such as the large measurement range, high accuracy and so on. The principle of this sensor is explained and simulated with ZEMAX. At the same time, the light intensity distribution in the interference field isThe displacement sensor based on the principle of double diffraction grating interference has many advantages, such as the large measurement range, high accuracy and so on. The principle of this sensor is explained and simulated with ZEMAX. At the same time, the light intensity distribution in the interference field is studied based on the angular spectrum theory. The result shows that the trigonometric distribution interference fringes are gained after the laser passing the dual-grating, and the fringes move a cycle when the dual-grating moves one grating distance relatively. The factors which may result in the displacement measurements errors of dual-grating sensors and the effect of these factors on the results are studied. Error expressions of some factors are also presented..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 41 (2012)
Influence of Buffer Gas Pressure on Rubidium Atomic Absorption
YU Xiang-sheng, WANG Wei-min, and CHEN Xing-wu
The absorption linewidth of the rubidium atom is very narrow, the pump absorption linewidth of the rubidium atom can be wider by filling a ration of buffer gas, and the absorption rate of the pump light can be also improved. The correspondence among the incident pump spectral width, incident pump intensity and the buffThe absorption linewidth of the rubidium atom is very narrow, the pump absorption linewidth of the rubidium atom can be wider by filling a ration of buffer gas, and the absorption rate of the pump light can be also improved. The correspondence among the incident pump spectral width, incident pump intensity and the buffer gas pressure is gained, the best working conditions are also found. The high pump absorption efficiency from the center frequency for rubidium atom can be achieved, the total pump absorption efficiency within the spectral width can be also ensured. The simulation results show that with the increasing of the buffer gas pressure, the absorption linewith of the rubidium atom increases, but the total absorption efficiency of the pump light decreases unobviously..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 46 (2012)
Diffusion Uniformity in Sheet Resistance of Silicon Solar Cells
XIE Qing, GAO Hua, and YANG Le
In the manufacture of crystalline silicon solar cells, it is important to control the diffusion quality for improving the cell quality and efficiency. On the basis of analyzing the effect of the diffusion uniformity on the equipment and the craftwork, the experimental methods for the optimizing diffusion uniformity areIn the manufacture of crystalline silicon solar cells, it is important to control the diffusion quality for improving the cell quality and efficiency. On the basis of analyzing the effect of the diffusion uniformity on the equipment and the craftwork, the experimental methods for the optimizing diffusion uniformity are presented, including P diffusion is slowed down using SiO2 sheet, the flux of N2 and O2 is controlled in the diffusion, the effect of the temperature fluctuation on the diffusion result is reduced, the temperature is compensated by setting the high temperature in the throat opening, the pressure is adjusted for achieving the dynamic balance. The experiment shows that these methods are helpful for improving the performance of solar cells and guiding the production of industrialization..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 50 (2012)
Optimization of LED Array Mode
SONG Ning-liang, WANG Ya-jun, LUO Bing-dong, and SUN Tian-xi
The lighting technique of LED has experienced substantial progress. However, a single LED cannot meet the demand for the normal lighting. LED combination is usually adopted to achieve the desired lighting effects. The forms of LED combination are varied. A detailed optical analysis on four forms of LED planar array is The lighting technique of LED has experienced substantial progress. However, a single LED cannot meet the demand for the normal lighting. LED combination is usually adopted to achieve the desired lighting effects. The forms of LED combination are varied. A detailed optical analysis on four forms of LED planar array is taken by using Tracepro, which are 3×3 square array, 3-6 concentric array, Archimedean spiral array and 1-8 circular array. By the comparison, which find that 1-8 circular array is the best optimal design to reduce the waste of material and further improve the cost performance of LED lighting under the conditions of meeting the lighting requirements. A reference can be provided for the popularity of LED lighting..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 54 (2012)
Study on Mesh Simplification Methods Based on Visual Effect and Implement of QEM Method
WU Jing-wen, QUAN Ji-cheng, ZHAO Xiu-ying, and LIU Yu
The computer may cause the serious delay when it processes the large 3D mesh, which influences the visual effect of the scene. Taking the visual effect as the primary condition, the simplification method of 3D mesh model and QEM method are studied. Firstly the simplification methods are classified. Then the error evaluThe computer may cause the serious delay when it processes the large 3D mesh, which influences the visual effect of the scene. Taking the visual effect as the primary condition, the simplification method of 3D mesh model and QEM method are studied. Firstly the simplification methods are classified. Then the error evaluation methods of the simplification mesh are studied. Finally the QEM method is implemented based on OpenGL. It only takes 111.78 ms to accomplish 93.7% of the simplification, meanwhile the visual effect is also remained..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 59 (2012)
Image Enhancement Method Using Improved Histogram Equalization
HU Dian-hai, LV Xu-liang, and WEN Liu-qiang
The basic theory of the histogram equalization algorithm is analyzed, the image gray level, especially the gray level that denotes the image details is amalgamated overly, which can cause the imager after processing to lose the details and become fuzzy. In order to solve this problem, an algorithm for the increasing imThe basic theory of the histogram equalization algorithm is analyzed, the image gray level, especially the gray level that denotes the image details is amalgamated overly, which can cause the imager after processing to lose the details and become fuzzy. In order to solve this problem, an algorithm for the increasing image gray level after the histogram equalization is proposed. Firstly, extract the high frequency details of the original image from the space or the frequency domain, and then add them with the image processed by the histogram equalization, lastly, the different image after enhancement is gained by adjusting the weight coefficient of the high frequency. The experimental results show that comparing with the traditional histogram equalization, the overall contrast can be enhanced and retained the more details of the original image..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 65 (2012)
Character of Representative Spots from Background by Using Cluster Analysis
CAI Yun-xiang, TIAN Zhen-xi, and BI Dao-kun
The pattern painting is an important method to protect the target, the pattern painting design is based on the spot shape design. First, the visible spots are extracted automatically from the background image. Then, the statistic characteristics of the girth, area, elongation ratio, rectangular ratio, slightness ratio The pattern painting is an important method to protect the target, the pattern painting design is based on the spot shape design. First, the visible spots are extracted automatically from the background image. Then, the statistic characteristics of the girth, area, elongation ratio, rectangular ratio, slightness ratio and dispersing ratio for the background spot are analyzed. Finally, taking the length, rectangular ratio, slightness ratio and dispersing ratio as the spot characteristic vector, the extracted background spot is analyzed by using HCM cluster analysis, and the characteristic parameter is gained. This method can gain the statistic characteristics of the large sample background images, which is useful to for the design of the automatic and quantitative pattern painting..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 69 (2012)
Application of Floating Threshold Algorithm in Small Target Image Extraction Process
HU Hong-wei, LI Hong-peng, and LI Shi-cheng
Aiming at the problem of the extraction for the target object in the complex images, the advantages and disadvantages of the common algorithm (background subtraction, optical flow and frames differences) in the pixel image processing and the applicable range are introduced. The method of the floating threshold in the sAiming at the problem of the extraction for the target object in the complex images, the advantages and disadvantages of the common algorithm (background subtraction, optical flow and frames differences) in the pixel image processing and the applicable range are introduced. The method of the floating threshold in the small target image extraction and the algorithm design process are proposed. The experiment shows that the object can be quickly extracted by using this method, the image object after fuzzy classification is restored and the background is replaced by other color. The object extraction can be realized..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 74 (2012)
Non-uniformity Correction of Linear Array Detector Based on FPGA
GAO Wen-qing, XU Shi-wei, LIU Yan-yan, and DING Yan-yan
Based on the FPGA hardware resources, a FPGA in the logic circuit design is presented to achieve the two-point correction. The floating-point adder, floating-point divider, floating-point multiplier and the internal RAM, ROM memory in FPGA can be used to calculate the correction factors in real time, and then the non-uBased on the FPGA hardware resources, a FPGA in the logic circuit design is presented to achieve the two-point correction. The floating-point adder, floating-point divider, floating-point multiplier and the internal RAM, ROM memory in FPGA can be used to calculate the correction factors in real time, and then the non-uniformity correction is completed on the linear array infrared detector, thus the correction accuracy is ensured. At the same time, the coefficient and the reading of image data can be completed in a clock cycle by using the parallel processing ability of the FPGA..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 77 (2012)
Measurement Design of Laser Scattering Characteristic for Nature Ground Objects
ZHANG Lei, SHAO Ming, and ZHANG Lei-lei
The common comparative measurement method is analyzed, and some difficulties of this method are pointed out when the laser scattering characteristic for the nature ground objects is measured. Based on the principle of the comparative measurement method, the measurement method is improved, and a near field measurement mThe common comparative measurement method is analyzed, and some difficulties of this method are pointed out when the laser scattering characteristic for the nature ground objects is measured. Based on the principle of the comparative measurement method, the measurement method is improved, and a near field measurement method which is based on the omni-directional measurement and the energy conversion contrast is designed. It can improve the measurement efficiency and precision of the laser scattering characteristic for the nature ground objects..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 82 (2012)
Study of Temperature Measurement Precision Base on Infrared Thermal Imager
GUAN Shang-hong, WANG Bi-yi, ZHAO Wan-li, and YAN Xiu-sheng
The principles of the working and temperature measurement for the infrared thermal imager are introduced. The factors that influence the measurement precision of the infrared thermal imager are analyzed. The mathematical expression that the error factors influence the temperature measurement is derived in theory, and tThe principles of the working and temperature measurement for the infrared thermal imager are introduced. The factors that influence the measurement precision of the infrared thermal imager are analyzed. The mathematical expression that the error factors influence the temperature measurement is derived in theory, and the error curve under different temperature conditions for the materials with different emissivity are calculated. The temperature measurement precisions of middle infrared (MIR) and long infrared (LIR) thermal imager are compared..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 27, Issue 3, 85 (2012)
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