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Electro-Optic Technology Application
Contents
2009
Volume: 24 Issue 1
21 Article(s)
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Research Article
Fiber Delay Line Buffer Technology in Optical Packet Switching Network
[in Chinese], [in Chinese], and [in Chinese]
The optical packet switching network is the necessary tendency in the development of all optical networks. But the bottleneck in developing the optical packet switching network is the optical buffer technology. At the present time, the most realistic approach is to use fiber delay line (FDL) as optical buffer. The FDL
The optical packet switching network is the necessary tendency in the development of all optical networks. But the bottleneck in developing the optical packet switching network is the optical buffer technology. At the present time, the most realistic approach is to use fiber delay line (FDL) as optical buffer. The FDL optical buffer technology is emphatically studied, analyzed and generalized further. The merits and faults of each FDL optical buffer technology are analyzed in detail. And the key issues and directions of future study in this area are pointed out..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 1 (2009)
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[in Chinese]
.
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 1 (2009)
Get PDF
Temperature Correction in the Temperature Field Reconstruction with Emission Spectrum Tomography
ZHANG Zhi-min, CHANG Fang-fei, and ZHANG Hui
The non-contact temperature correction in the temperature field reconstruction with Emission Spectral Tomography (EST) is mainly studied based on the black-body radiation theory, the experimental result shows that the error caused by the interference of the contact thermodetector to the original field can be effectivel
The non-contact temperature correction in the temperature field reconstruction with Emission Spectral Tomography (EST) is mainly studied based on the black-body radiation theory, the experimental result shows that the error caused by the interference of the contact thermodetector to the original field can be effectively avoided in the non-contact temperature correction (temperature correction with black-body furnace), the problem of the temperature correction in high-temperature area or super high-temperature area in the EST can also be solved, the accuracy of the temperature reconstruction can be improved on the basis of the contact correction, and the application scope of temperature can be extended..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 5 (2009)
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Transmission Characteristics of a Convoluted Frequency Selective Surface
QIANG Hai-xia, JIANG Li-yong, and LI Xiang-yin
Ansoft Designer software package based on Method of Moment is used to analyze a New Convoluted Double Square Loop Frequency Selective Surface (NCDSL FSS). The results show that such structure is insensitive to the incident angle and the polarization of the incident electromagnetic wave. Compared to the CDSL FSS, the pe
Ansoft Designer software package based on Method of Moment is used to analyze a New Convoluted Double Square Loop Frequency Selective Surface (NCDSL FSS). The results show that such structure is insensitive to the incident angle and the polarization of the incident electromagnetic wave. Compared to the CDSL FSS, the performance of NCDSL FSS is less influenced by the grating lobe. Unlike CDSL FSS, NCDSL FSS has the ability of bidirectional tuning the band spacing based on the Double Square Loop Frequency Selective Surface (DSL FSS) with the same unit cell size and the same array periods. Furthermore, the -0.5dB relative reflection bandwidth at the higher resonance of NCDSL FSS is always larger than that of CDSL FSS and DSL FSS. Thus NCDSL FSS is a new simple frequency selective structure with higher performance..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 9 (2009)
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Optical Design of the Reflective Eccentric-pupil Collimator with Large-aperture and Long Focal Length
LV Bao-bin, LI Ying-cai, MA Zhen, and YANG Li-hua
The Eccentric-pupil two-mirror collimator is analyzed and its disadvantages are pointed out. The field view of eccentric-pupil two-mirror system is usually small. In order to enlarge field view and to improve image quality, a method of decentering and tilting the secondary mirror is introduced, the primary aberration o
The Eccentric-pupil two-mirror collimator is analyzed and its disadvantages are pointed out. The field view of eccentric-pupil two-mirror system is usually small. In order to enlarge field view and to improve image quality, a method of decentering and tilting the secondary mirror is introduced, the primary aberration of the system with decentered and tilted component is simply analyzed using the vector aberration theory. Two designs are given and compared, showing that the method presented could get a good design by enlarging system field and by improving image quality..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 13 (2009)
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Anti-interference Imaging System Based on 940 nm Active Infrared Illumination
ZHANG Hai-jin, and WANG Jin-yu
An imaging system based on 940 nm active infrared illumination is designed to eliminate the influences of the changing of environmental brightness on the conformity of image data collected by biological characteristic identification system, and the configuration and working principle of the system are described. The an
An imaging system based on 940 nm active infrared illumination is designed to eliminate the influences of the changing of environmental brightness on the conformity of image data collected by biological characteristic identification system, and the configuration and working principle of the system are described. The analysis and experiments show that the system has characteristics of high signal-to-noise ratio and extraordinary conformity, and also can improve the image recognition accuracy and the probability effectively..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 18 (2009)
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Application of Rate Gyroscopes to Optical Axis Stabilization for TV Tracker on Deck
ZHAO Jian-chuan, and XUE Le-tang
Rate gyroscopes are widely applied to stabilize measuring systems with active carriers. When the gyros are set in different ways, the different values can be obtained at their sensor axis, which decides the mathematic expressions of accounting the disturbance values of measuring systems caused by carriers’ movements. T
Rate gyroscopes are widely applied to stabilize measuring systems with active carriers. When the gyros are set in different ways, the different values can be obtained at their sensor axis, which decides the mathematic expressions of accounting the disturbance values of measuring systems caused by carriers’ movements. The gyro setting ways are summarized according to the applications in TV-tracker on deck. And the desired goals can be achieved in practice..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 22 (2009)
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Jamming Effect of the High-repetition-frequency Laser to the Laser Seeker
ZHANG Heng-wei, ZHAO Wei, JI Xiang, WANG Ying-hong, and ZHANG Lei
The jamming mechanism of the high-repetition-frequency laser to the laser seeker is discussed. The parameters, such as the laser interference frequency, output power, laser seeker’s time gate, automatic gain control are analyzed.The phenomena is found in the research that the better jamming effect can be obtained even
The jamming mechanism of the high-repetition-frequency laser to the laser seeker is discussed. The parameters, such as the laser interference frequency, output power, laser seeker’s time gate, automatic gain control are analyzed.The phenomena is found in the research that the better jamming effect can be obtained even in the circumstance when the frequency of interference laser does not to meet the relationship of “frequency and wave gate” requirement, and this phenomena is theoretically analyzed..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 26 (2009)
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Differentiation Algorithm Method of Ground-Air Infrared Detection Range
KANG Da-yong, CHENG Bin, and GAO Jun-Guang
Based on the classic formulas for operating range of infrared detection system, the factors affecting ground-air infrared detection range, such as infrared object radiant intensity, background radiant intensity and atmosphere transmittance are analyzed. Expressions of differentiation algorithm for detection range are s
Based on the classic formulas for operating range of infrared detection system, the factors affecting ground-air infrared detection range, such as infrared object radiant intensity, background radiant intensity and atmosphere transmittance are analyzed. Expressions of differentiation algorithm for detection range are shown..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 29 (2009)
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Lubrication of Airborne Optoelectronic Stabilization Platform
XIA Jun, and QU Ji-feng
According to the structure shape and the application circumstance, the idea that the grease is the best lubricant way for the airborne optoelectronic stabilization platform is pointed out. By comparing the difference of the bearing’s resistance moment before and after being lubricated, the image stabilization under the
According to the structure shape and the application circumstance, the idea that the grease is the best lubricant way for the airborne optoelectronic stabilization platform is pointed out. By comparing the difference of the bearing’s resistance moment before and after being lubricated, the image stabilization under the influence of resistance moment is analyzed using MATLAB. The requirements and choosing rules of grease for optoelectronic stabilization platform are given..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 33 (2009)
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Developments of Ohmic Contacts of AlGaN Devices
WANG Yi-feng, and TANG Li-bin
The III-V nitrides AlGaN has received a lot of attention recently as one of the important wide band gap semiconductor materials for fabricating optoelectronic components such as ultraviolet photodetectors, heterostructure field effect transistors, and high electron mobility transistors. But difficulties in realizing lo
The III-V nitrides AlGaN has received a lot of attention recently as one of the important wide band gap semiconductor materials for fabricating optoelectronic components such as ultraviolet photodetectors, heterostructure field effect transistors, and high electron mobility transistors. But difficulties in realizing low-resistance ohmic contacts between metals and AlGaN have blocked their developments. By summering and analyzing the related papers published in recent years, the developments of ohmic contact formation, metallization scheme, alloying process and surface treatments for various AlGaN devices are presented..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 36 (2009)
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Optimization Design of Xenon Lamp Parabolic Reflector
YANG Hai-bo, WANG Bai-lin, and DU Zhi-ming
The parabolic reflector is an ideal xenon lamp reflector. According to the features of the parabolic reflector, the relationship among the focal length, diameter, axial defocus and the wrap angle of reflector are analyzed. The inflence axial defocusing on the wrap angle and the distance of complete flash is also discus
The parabolic reflector is an ideal xenon lamp reflector. According to the features of the parabolic reflector, the relationship among the focal length, diameter, axial defocus and the wrap angle of reflector are analyzed. The inflence axial defocusing on the wrap angle and the distance of complete flash is also discussed..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 43 (2009)
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Fabrication and Application of Long Period Fiber Gratings
LU Zhi
The wide application of long-period fiber gratings (LPGs) in the fields of optical fiber communication and optical fiber sensor is summarized. The strength masking ultraviolet light-dependent photosensitive fiber core writing, coveting mechanism and heat damaging writing are discussed. The application of LPG in the opt
The wide application of long-period fiber gratings (LPGs) in the fields of optical fiber communication and optical fiber sensor is summarized. The strength masking ultraviolet light-dependent photosensitive fiber core writing, coveting mechanism and heat damaging writing are discussed. The application of LPG in the optical fiber communication and optical fiber sensing is analyzed and described with illustrations..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 46 (2009)
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Design of DSP-based Control Circuit of Electromagnetic Riveting Gun for Airplane
WANG Xue-feng, and QUAN Shu-hai
A DSP-based control circuit of electromagnetic riveting gun for the airplane is designed. According to the technique requirements of the electromagnetic riveting gun during the process of riveting airplane components, the circuits, such as charging voltage gathering circuit, charging loop control circuit and dischargin
A DSP-based control circuit of electromagnetic riveting gun for the airplane is designed. According to the technique requirements of the electromagnetic riveting gun during the process of riveting airplane components, the circuits, such as charging voltage gathering circuit, charging loop control circuit and discharging loop control circuit, are designed..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 50 (2009)
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Design of Control Circuit for High Speed Coded Semiconductor Laser
SONG Yi-heng, WANG Gao-yong, HUA Zhen-bin, and SUN Le
Based on the SCM and the complex programmable logic device (CPLD) technique, the basic design methods of SCM module, CPLD management module and the drive circuit module are introduced. The design way of addressing the peripheral RAM by the hardware circuit of the CPLD is explained, the diagram of time sequence of the a
Based on the SCM and the complex programmable logic device (CPLD) technique, the basic design methods of SCM module, CPLD management module and the drive circuit module are introduced. The design way of addressing the peripheral RAM by the hardware circuit of the CPLD is explained, the diagram of time sequence of the addressing RAM circuit is given out at the same time. The pulse sequence code generated by the control circuit is proved to have the virtue of high precision, high speed and the changable interval through observing the oscilloscope (TDS5104B)..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 54 (2009)
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Design of High Dependability Interface Module Based on FPGA
WANG Jing, and LIU Meng
The actual design of the processor interface modules and their problems existed are introduced. A new design project of processor interface module based on FPGA is put forward. The function of the FPGA is analyzed, the developing flow is described. Dividing the design of the FPGA into several function modules according
The actual design of the processor interface modules and their problems existed are introduced. A new design project of processor interface module based on FPGA is put forward. The function of the FPGA is analyzed, the developing flow is described. Dividing the design of the FPGA into several function modules according to design rules from the top to bottom, the function, the basic structure, and the key circuit of every module are explained. The function simulation and the time sequence simulation in VerilogHDL code level are carried out using the Modelsim. The system function tests are performed on the control system platform and the stability and feasibility of the processor interface are proved..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 58 (2009)
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Implementation of Multi-serial Communication Based on DOS
SONG Yi-fei, and ZHANG Rui
For one of virtues is the mature technique, the DOS system takes an important place in the embedded operation system all the time. So design for most of the embedded computer programs are completed on the DOS platform. How to implement the multi-serial communication in the way of operating directly INS8250’s register a
For one of virtues is the mature technique, the DOS system takes an important place in the embedded operation system all the time. So design for most of the embedded computer programs are completed on the DOS platform. How to implement the multi-serial communication in the way of operating directly INS8250’s register and the program design of IRQ function on the DOS platform are introduced. And the issue of high-order IRQ in the multi-serial communication is resolved..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 62 (2009)
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Application of Improved Particle Filter Algorithm in Target State Estimation
LI Chun-xin, WANG Xiao-tong, and XU Xiao-gang
Aiming at the choice of proposal function and degeneracy problem in particle filter (PF), an improved algorithm is put forward. Unscented Kalman Filter (UKF) is used to produce the proposal function, the estimate accuracy can be improved, Markov Chain Monte Carlo (MCMC) is applied to keep the diversity of the particles
Aiming at the choice of proposal function and degeneracy problem in particle filter (PF), an improved algorithm is put forward. Unscented Kalman Filter (UKF) is used to produce the proposal function, the estimate accuracy can be improved, Markov Chain Monte Carlo (MCMC) is applied to keep the diversity of the particles and solve the degeneracy problem. The simulation result illustrates the algorithm is superior to PF, UPF, PF-MCMC (PF with MCMC) and PF- EKF-MCMC (PF with EKF and MCMC) in accuracy..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 66 (2009)
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Image Gathering and Compressing Based on Embedded System
JIANG Hui, LIANG Jun-ming, and REN Gao-xing
The platform of the embedded monitoring system is introduced at first. Then how to realize image gathering and compression on the platform is described. The implementation of Video4 Linux program and the JPEG compression algorithm are emphatically expounded. Finally, JPEG compression is completed in Linux system, and t
The platform of the embedded monitoring system is introduced at first. Then how to realize image gathering and compression on the platform is described. The implementation of Video4 Linux program and the JPEG compression algorithm are emphatically expounded. Finally, JPEG compression is completed in Linux system, and the results are satisfied..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 70 (2009)
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A Modified Fast HCM Algorithm for Color Clustering
CAI Yun-xiang, QIN Jian-fei, MENG Xian-hao, and LU Hui
Aiming at two disadvantages of the traditional HCM, which are its too long running time and its easy getting into local optimum solution, the HCM algorithm combined with pyramidal structure and subtractive clustering is put forward. This algorithm uses the pyramidal structure to describe the image in different scales,
Aiming at two disadvantages of the traditional HCM, which are its too long running time and its easy getting into local optimum solution, the HCM algorithm combined with pyramidal structure and subtractive clustering is put forward. This algorithm uses the pyramidal structure to describe the image in different scales, and carries out HCM after getting the initial center by the subtractive clustering in the top image. Then HCM is done in the image at this layer with cluster result of upper image as the initial center, the result of the bottom image is the final clustering result. Simulation experiments show that the running time of this algorithm is far shorter than that of traditional HCM, and clustering quality also is better..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 73 (2009)
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An Integrated Watermarking Technology Combining Spatial Domain with Wavelet Domain
JIANG Jian-ping, and BAI Zhi-gang
A kind of integrated watermarking algorithm is put forward, which combines the spatial domain with the wavelet domain, and the algorithm’s performance is analyzed. The results show that the new algorithm can improve the watermarking security without reducing the algorithm’s robustness and has more application value in
A kind of integrated watermarking algorithm is put forward, which combines the spatial domain with the wavelet domain, and the algorithm’s performance is analyzed. The results show that the new algorithm can improve the watermarking security without reducing the algorithm’s robustness and has more application value in the fields of industry and commerce..
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Electro-Optic Technology Application
Publication Date: Oct. 09, 2021
Vol. 24, Issue 1, 78 (2009)
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