Journals >Electro-Optic Technology Application
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2009
Volume: 24 Issue 5
23 Article(s)
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Research Article
Analysis for One-dimensional Trace by A Controllable Scan of Dual-wedge Prism System
WEI Zhong-chao, MO Wei, XIONG Yan-wei, DAI Qiao-feng, and LIANG Rui-sheng
According to the theories of geometric optics and scalar diffraction, the refractive property of light for dual-wedge prism system was analyzed. The study found that the refractive effect of the dual-wedge prism rotating in the same rotation speed and in the opposite direction is equivalent to a single-wedge prism, of According to the theories of geometric optics and scalar diffraction, the refractive property of light for dual-wedge prism system was analyzed. The study found that the refractive effect of the dual-wedge prism rotating in the same rotation speed and in the opposite direction is equivalent to a single-wedge prism, of which an angle of refraction is changed with the rotary angle between two wedges. On this basis, a theoretical analysis on the diffraction light field of outgoing light through the rotary dual-wedge system was made and the law of position of diffraction light spots changes with the time under the situation of Fraunhofer diffraction was obtained. This research may give a useful theoretical direction for the 1-D controllable scan..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 1 (2009)
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 1 (2009)
Control Technology of Smoke and Temperature in Automobile Power Unit
GONG Wei-jia, SHEN Wei-dong, LIU He-jun, and LI Hong-liang
Aimed at the problems of smoke degree and temperature increasing brought by exhaust of smoke from the diesel generator groups in the automobile power unit, the project of controlling the system was designed by researching the optics and infrared control mechanism. The experiment proves that through the way of using rocAimed at the problems of smoke degree and temperature increasing brought by exhaust of smoke from the diesel generator groups in the automobile power unit, the project of controlling the system was designed by researching the optics and infrared control mechanism. The experiment proves that through the way of using rock wool to maintain the temperature, using the DPF and bag metal fibers to filter, and using the washing smoke system to lower temperature and to filter, could achieve good cleaning and cooling effect. Test results show that the exhaust backpressure is less than 14 kPa, the filtration efficiency is up to 99%, and the temperature range is more than 85%..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 4 (2009)
Application of Ｆractal Ｔheory in Ｅvaluation of Ｉnfrared Ｃamouflage Ｅffectiveness
YANG Hui, XU Xin, XIE Wei, LV Xu-liang, and ZHANG Shuan-qin
A new method to evaluate camouflage effectiveness by using the fractal character of infrared image was put forward. Infrared images of the object before and after camouflage were obtained. The fractal characters of the object and six around backgrounds before and after camouflage through Covering-Blanket were calculateA new method to evaluate camouflage effectiveness by using the fractal character of infrared image was put forward. Infrared images of the object before and after camouflage were obtained. The fractal characters of the object and six around backgrounds before and after camouflage through Covering-Blanket were calculated. The comparability between the object and around backgrounds by the difference of their fractal characters was analyzed. The experiment result shows that comparability of the object and natural background before and after camouflage is enhanced, and the fraction is available to evaluate camouflage effectiveness..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 7 (2009)
Project Application of Size and Number Density Distribution of Aerosol Particle in Laser Atmosphere Transmission
CHEN Yu-ru, FENG Fu-qiang, and LI Qing
Size and number density distribution of aerosol particle is important parameter in calculating laser atmosphere transmission. The aerosol particle have characteristics of change by space-time and difficulty in measurement, therefore, according to measured data and from the project application, the function expression oSize and number density distribution of aerosol particle is important parameter in calculating laser atmosphere transmission. The aerosol particle have characteristics of change by space-time and difficulty in measurement, therefore, according to measured data and from the project application, the function expression of size and number density distribution of aerosol particle were acquired by curve-fitting method. The validate practicability of this function was verified through simulation and calculation..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 10 (2009)
Countermeasures Technology for IR Dual-Color Combined Guidance
KANG Da-yong, GAO Jun-guang, HU Hu-xiang, and QIN Xiao-hu
The development of IR dual-color combined guidance technology is presented. The operating principle of the IR dual-color guidance seeker is introduced. The anti-jamming technique of IR dual-color guidance is discussed. Several jamming techniques for IR dual-color guidance head are analyzed. These jamming techniques incThe development of IR dual-color combined guidance technology is presented. The operating principle of the IR dual-color guidance seeker is introduced. The anti-jamming technique of IR dual-color guidance is discussed. Several jamming techniques for IR dual-color guidance head are analyzed. These jamming techniques include special material decoy, stable flame pyrotechnic IR decoy, plasma gas aerogel, news pneumatic IR decoy and electro-optic countermeasure system..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 14 (2009)
Advances in Third-Generation HgCdTe Devices
WANG Yi-feng, and TANG Li-bin
By summarizing and analyzing some related papers published in English over the last few years, the status of third generation Mercury Cadmium Tellurium (MCT) devices, including two-colour or three-colour detectors with novel device structure, avalanche photodiodes and multi-spectral arrays, were presented. The developmBy summarizing and analyzing some related papers published in English over the last few years, the status of third generation Mercury Cadmium Tellurium (MCT) devices, including two-colour or three-colour detectors with novel device structure, avalanche photodiodes and multi-spectral arrays, were presented. The developments of third generation MCT devices in array size, very long wavelength application of photovoltaic technology, multi-colour, readout capability and etc were analyzed. It is pointed that the sophisticated controllable vapor phase epitaxial growth methods, such as Molecular Beam Epitaxy (MBE) and metal organic chemical vapour deposition (MOCVD), can be used to fabricate almost ideally designed heterojunction photodiodes. With the progress of MCT technology based on MBE, large wafers (4 inches and more) are available on germanium in France and on silicon in the USA. This enables larger wafer to have a sensitive thin film deposition, of which the thickness is controllable. Third generation MCT technology is hopeful of achieving the high-rate production in three or five years according to the related progress right now..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 17 (2009)
Liquid Sensor of Long Period Fiber Grating
OU Qi-biao, ZENG Qing-ke, QIN Zi-xiong, HUANG Fu, and XIE Jun-hua
On the basis of simplified three-layer model, and in two aspects such as refractive index sensing and step-index fiber grating property, the study on using long-period fiber grating as liquid level sensor in theory was made. When the resonance peak loss as a sensing parameter is measured, the overcoupling did not happeOn the basis of simplified three-layer model, and in two aspects such as refractive index sensing and step-index fiber grating property, the study on using long-period fiber grating as liquid level sensor in theory was made. When the resonance peak loss as a sensing parameter is measured, the overcoupling did not happen, within a wider range, the linear relationship of the resonance peak loss and the percent of the LPG immersed in liquid would become very well. In contrast, the grating peak loss did not correspond with the percent of immersed liquid as soon as the overcoupling happened..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 23 (2009)
Several Scanning Probe Microscopy Characterization Techniques on Nanomaterials
CHU Hong-xiang
Scanning probe microscopy (SPM) is a powerful tool for surface characterization. It could be used to represent three dimensional morphology and surface roughness, aperture size, distribution, so it can be applied to many scientific fields. The several recent scanning probe spectroscope characterization techniques are sScanning probe microscopy (SPM) is a powerful tool for surface characterization. It could be used to represent three dimensional morphology and surface roughness, aperture size, distribution, so it can be applied to many scientific fields. The several recent scanning probe spectroscope characterization techniques are summarized, including scanning tunneling microscope(STM)、 atomic force microscope (AFM) and scanning near-field optical microscopy (SNOM), which could provide useful information concerning the structure and character of nanomaterials..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 27 (2009)
Application of Fiber Bragg Grating Sensing Technology in Intelligent Traffic Detection System
YANG Long, MA Lan, HUANG Xiao-yu, CHEN Lei, and LIU Dan
The application of fiber Bragg grating(FBG) sensing technology in traffic detection system and the problem of the temperature cross sensitivity in FBG strain sensing were discussed. The structure and principle of the FBG sensor were theoretically analyzed, and the experiment system was constructed through making experiThe application of fiber Bragg grating(FBG) sensing technology in traffic detection system and the problem of the temperature cross sensitivity in FBG strain sensing were discussed. The structure and principle of the FBG sensor were theoretically analyzed, and the experiment system was constructed through making experiment investigation, the ideal experiment results were ultimately obtained after many tests. Several experiments on different types of vehicles proved that the accuracy rate of the identification system could be arrived at 100%, which is perfectly matched with the principle. This system has the merit of resistance to damp and dust, anti-electromagnetic interference, and it is hopeful for replacing the existent electric products. The system has been widely applied in practical engineering..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 30 (2009)
Data Fusion for Flight Target Measurement Based on Dissimilar Sensors
PAN Li-na
In testing a flying object in the range,the detecting, tracking and estimating of the position of the object are necessary.After analyzing laser tracking and measurement system and infrared search and tracking system’s the development now, work principle and development trend, a new data fusion model based on LTMS and In testing a flying object in the range,the detecting, tracking and estimating of the position of the object are necessary.After analyzing laser tracking and measurement system and infrared search and tracking system’s the development now, work principle and development trend, a new data fusion model based on LTMS and IRST was put forward. The fusion model can be used to make data fusion during the flying object test in the range in order to obtain the more precise data about the flying object position..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 34 (2009)
Stability of Resistance Strain-gage Transducer
ZHANG Qi, LI Xin’e, and ZU Jing
In the process of instrument demarcating, the stability of test system is directly connected with whether the whole test result is correct and reliable. Therefore, the stability of instrument is quite crucial and important for the test system. The instability caused by sense organ of the library system was analyzed in In the process of instrument demarcating, the stability of test system is directly connected with whether the whole test result is correct and reliable. Therefore, the stability of instrument is quite crucial and important for the test system. The instability caused by sense organ of the library system was analyzed in time, and several common factors influencing on the stability of the system were introduced, but the way to improve and increase the stability of the system was mainly analyzed..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 37 (2009)
Design of Practical Driven Circuit for Small Power Semiconductor Lasers
LIU Bao-yuan, and GUO Xiao-yun
The stability of semiconductor lasers depends on the driven power. According to the requirement for light extinction ratio tester, a practical semiconductor laser driven power based on the UC3842 PWM chip was designed. The driven power is applicable to the smaller power semiconductor lasers, the output duty cycle and fThe stability of semiconductor lasers depends on the driven power. According to the requirement for light extinction ratio tester, a practical semiconductor laser driven power based on the UC3842 PWM chip was designed. The driven power is applicable to the smaller power semiconductor lasers, the output duty cycle and frequency adjustable driven signal, which make it put out some modulation optical signals with a certain frequency, so the protection functions, such as slow start, over-current, over-voltage and high frequency can be realized. These protections can make semiconductor lasers working safely at room temperature. The experimental results prove the feasibility of this program and meet the requirements for tester..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 40 (2009)
Anti-jamming Design for External Circuit of Pyroelectric Detector
ZHANG Hai-zhuang, HU Wei-xing, WANG Hai-tao, ZOU Yong-jie, and LIU Hu
By researching external circuit of pyroelectric detector in a laser spot measurement system, combining the operating principle of pyroelectric detector, the factors interfering the measurement system were analyzed and an anti-jamming external circuit of the pyroelectric detector was designed. The test shows that this cBy researching external circuit of pyroelectric detector in a laser spot measurement system, combining the operating principle of pyroelectric detector, the factors interfering the measurement system were analyzed and an anti-jamming external circuit of the pyroelectric detector was designed. The test shows that this circuit can reduce the optical interference in thermoelectric conversion, and increase the signal output amplitude and signal to noise ratio. The measurement accuracy of this system is improved..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 44 (2009)
Design of Programmable Optical Fiber Transmission Experiment System
ZHOU Xin, ZHAO Tong-gang, and WANG Li
A set of digital signal optical fiber transmission system that uses integrated optical transceiver modules as the main device was designed. The system choose complex programmable logic device EPM7128SLC84-15 for digital signal processing. The Pseudo-random sequence can be generated by switch as input signal of EPM7128 A set of digital signal optical fiber transmission system that uses integrated optical transceiver modules as the main device was designed. The system choose complex programmable logic device EPM7128SLC84-15 for digital signal processing. The Pseudo-random sequence can be generated by switch as input signal of EPM7128 for coding. This coding signal is transmitted through fiber-optic and shown with LED or oscilloscope in the receiver. The system works well, can be used in fiber-optic digital signal transmission experimental teaching, and it has a strong practical significance for the signal transmission in short distance, high speed local area network..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 47 (2009)
Signal Demodulation Techniques for Distributed Fiber Bragg Grating Sensors
LI Zhuo-xuan, PEI Li, QI Chun-hui, ZHAO Rui-feng, GAO Song, and YANG Guang
Distributed fiber bragg grating sensor is one of the critical application of fiber technique， and the signal demodulation is key to achieve network of sensing system. The basic principle of fiber Bragg grating(FBG) sensors was introduced. Two kinds of demodulation methods being used commonly at home and abroad in recenDistributed fiber bragg grating sensor is one of the critical application of fiber technique， and the signal demodulation is key to achieve network of sensing system. The basic principle of fiber Bragg grating(FBG) sensors was introduced. Two kinds of demodulation methods being used commonly at home and abroad in recent years were given: wavelength scan demodulation and parameter transform demodulation, and some typical techniques in these demodulations methods were discussed particularly, the advantages and disadvantages were concluded respectively，the basis for the design of distributed FBG sensing demodulation system was provided..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 50 (2009)
A kind of Image Super-Resolution Restoration Algorithm Based on Sub-Pixel
ZHAO Xiu-ying, HU Yu-chen, ZHAI Lin-pei, GE Wen-qi, XU Zheng-ping, and WANG Jing-mei
With the changes from optical imaging to digital imaging, how to improve the geometric resolution of CCD has become a problem urgent to be solved in developing a high-resolution electrical imaging system. A mathematic model for imaging on super-resolution and sub- pixel was built, a method to improve the geometric resoWith the changes from optical imaging to digital imaging, how to improve the geometric resolution of CCD has become a problem urgent to be solved in developing a high-resolution electrical imaging system. A mathematic model for imaging on super-resolution and sub- pixel was built, a method to improve the geometric resolution of CCD based on sub-pixel was presented, in which two linear CCDs staggered by half dimension of the pixel in the line direction are integrated in one component, while the reading out time is reduced to half; At last, the image data is interweaved to synthesize a high resolution image. Two methods, bilinear interpolation and sub-pixel imaging, were simulated with the software MATLAB. The effects of the two methods were analyzed qualitatively and quantitatively. The results show that with sub-pixel imaging method, the resolution of synthesized image is twice as large as that of low-resolution image, and the PSNRs in the two groups of simulating images are enhanced by 1. 486 4 dB and 2. 207 0 dB compared to that in bilinear interpolated image. Sub-pixel imaging method could mitigate greatly the image blur induced by under sampling, and the elapsed time is less than the bilinear interpolation method..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 54 (2009)
Infrared Image Processing System and Display Technology Based on FPGA+ Two DSPs
XU Shi-wei, LIU Yan-yan, WEI Dong, YANG Shao-yan, ZHANG Sheng-chong, and LI Man
In order to improve the imaging quality and real-time demands of infrared foccal plane (IRFPA) detectors, an infrared image digital processing system with a high speed signal processer in its centre was proposed. The composition of the dual infrared imaging system, the hardware structure, the chip selection, data proceIn order to improve the imaging quality and real-time demands of infrared foccal plane (IRFPA) detectors, an infrared image digital processing system with a high speed signal processer in its centre was proposed. The composition of the dual infrared imaging system, the hardware structure, the chip selection, data processing, as well as the principle of infrared image display and the processing of the video synthesis were described; At the same time, the verilog codes of the display chip ADV7123 were given. The results of imaging were certified satisfactory, which can meet the infrared image real-time demands and has high value in applications..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 57 (2009)
An Improved Parameters Estimated Method for Virtual Correlative Channel
DAI Ming-xin, and SONG Xing-hua
In the frame of the distributed video coding, the exact estimate for the statistic between the WZ frame and assistant side information, the exact model and estimated parameters for virtual correlative channel is important to improve the coding compress efficiency and the control of the code rate. The model selection anIn the frame of the distributed video coding, the exact estimate for the statistic between the WZ frame and assistant side information, the exact model and estimated parameters for virtual correlative channel is important to improve the coding compress efficiency and the control of the code rate. The model selection and parameters optimization for analog channel were discussed. The Laplace model and the Gauss model in common used in the video frequency were researched. An estimate method of parameters with emendation coefficient for virtual correlative channel was presented, and the estimated virtual channel more approaching to the real distribution of the residual difference data was validated..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 62 (2009)
Tracking Algorithms Simulation for Maneuvering Target
LIU Shun-cheng, WU Xiao-lu, HAN Kui-xia, and HAN Wei-hua
For developing a more robust model, the most popular target tracking algorithms are introduced, and the capacity difference of these methods in different tracking condition is compared. After establishing the relative square root error mean rule for evaluating tracking algorithm capacity, a lot of simulation results weFor developing a more robust model, the most popular target tracking algorithms are introduced, and the capacity difference of these methods in different tracking condition is compared. After establishing the relative square root error mean rule for evaluating tracking algorithm capacity, a lot of simulation results were analyzed with Monte-Carlo, and some valuable conclusion was made..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 67 (2009)
Emulating Analysis of Calculating Methodology for Scanning Period of Infrared Imaging Instrument
WANG Shou-hui, WANG Dong, WEI Lan-lan, and ZHANG Shi-yong
The emulated echo signals of scanning infrared imaging instrument were analyzed by emulating methodology under the circumstances of continuos laser detection and pulsed laser detection respectively. The method for calculating scanning period by utilizing echo signals of pulsed laser detection was dissertated, and the sThe emulated echo signals of scanning infrared imaging instrument were analyzed by emulating methodology under the circumstances of continuos laser detection and pulsed laser detection respectively. The method for calculating scanning period by utilizing echo signals of pulsed laser detection was dissertated, and the signal process arithmetic was expatiated adequately. Both the error and real-time adjustment existed in the calculating scanning period were deeply analyzed..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 70 (2009)
Modeling and Measure Error Analysis for IR Radiation Peculiarity of Aerial Target
LEI Ping, MA Na, QU Wei-dong, and XUE Ting
To prove the efficiency of the method to measure IR radiation peculiarity of aerial target, the modeling for the IR radiation peculiarity of aerial target was built with the knowledge about the wide band IR detector in medium and long wave, the mature arithmetic is calculated on the basis of optimization theory. The moTo prove the efficiency of the method to measure IR radiation peculiarity of aerial target, the modeling for the IR radiation peculiarity of aerial target was built with the knowledge about the wide band IR detector in medium and long wave, the mature arithmetic is calculated on the basis of optimization theory. The modeling and arithmetic were proved very precise by the results of the ideal experiment values simulation and field test data processing. Lastly, combining field experimental phenomena and processed data, the origin of measure error of radiation peculiarity for aerial target and the method to reduce the error were analyzed..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 73 (2009)
Emulation and Analysis of Random Vibration
WANG Qiang, and CHEN Ming
The causation of random vibration is introduced, and the usual design and test methods were summarized. Based on Gaussian distribution and Miner theory, the simulating analysis method and process for random vibration were put forward. Through the process of emulating and analyzing certain equipments, the practical waysThe causation of random vibration is introduced, and the usual design and test methods were summarized. Based on Gaussian distribution and Miner theory, the simulating analysis method and process for random vibration were put forward. Through the process of emulating and analyzing certain equipments, the practical ways to determine the boundary conditions of random vibration and to make the simulation and analysis by software were described, the problem to which must be paid attention during the simulation and analysis was point out. It can be a reliable reality method for this kind of the simulation analysis..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 5, 77 (2009)
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