Journals >Electro-Optic Technology Application
Contents
2013
Volume: 28 Issue 3
21 Article(s)
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Research Article
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 1 (2013)
Easily Fabricated Optical System Design of Space Camera
WANG Hong-wei, GONG Qing-ge, WANG Cai-ling, and ZHANG Dian-fu
With the development of space technology, new design requirements for optical systems of space cameras are provided. Higher accuracy requirements are provided for system processing so as to improve the reli. ability of camera systems. An easily fabricated optical system of space camera is introduced. A catadioptric optWith the development of space technology, new design requirements for optical systems of space cameras are provided. Higher accuracy requirements are provided for system processing so as to improve the reli. ability of camera systems. An easily fabricated optical system of space camera is introduced. A catadioptric opti. cal system with three pieces of spherical collimating mirror subassembly based on ritchey chretion (R-C) system is designed. It shows that when the space frequency of the system is 50 lp/mm, all the modulation transfer func. tions are more than 0.4. And the surface of primary and secondary mirror are quadric, the rest is spherical, which has the advantages of easiness in fabrication, installation and debugging..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 1 (2013)
Installation Method of Collimator Reticle Based on Digital Interferometer
CAO Zhi-rui, and WU Guo-dong
In order to improve installation accuracy of collimator reticle, an installation method based on dig. ital interferometer is proposed. Principles and implementation processes of the method are introduced. Installa. tion accuracy of this and existed methods are analyzed and calculated based on a collimator with 800 mm aIn order to improve installation accuracy of collimator reticle, an installation method based on dig. ital interferometer is proposed. Principles and implementation processes of the method are introduced. Installa. tion accuracy of this and existed methods are analyzed and calculated based on a collimator with 800 mm aper. ture and 20 m focal length. The results show that installation accuracy of this method for any reticle is better than 0.07 mm, which is much higher than that of existed methods..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 4 (2013)
Design for Laboratory Testing System of Infrared Imaging Equipment
DONG Ming-liang, LI Hang-yu, and LIN Tao
According to the development status of infrared scene generation technology and the technology of true infrared images simulated by infrared scene generator, an laboratory testing system to prove performances of infrared imaging equipments is designed. Structures and operation principles are analyzed. Virtual environ. According to the development status of infrared scene generation technology and the technology of true infrared images simulated by infrared scene generator, an laboratory testing system to prove performances of infrared imaging equipments is designed. Structures and operation principles are analyzed. Virtual environ. ment simulation units are designed by MultiGen Creator simulation tool and operation flows are given. An infra. red scene generator with DMD digital micro-mirror array structure is confirmed based on the analysis on technol. ogy levels and application states of infrared scene generators..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 8 (2013)
Error Correction Methods for Atmospheric Refraction of Electro-optical Theodolite
HAN Xian-ping
High accuracy measurement is mainly limited by the error from atmospheric refraction. According to data processing parts in real time and afterwards, two correction methods are proposed respectively. And refraction error correction and residual error models are built. By experimental validation and error comparing analHigh accuracy measurement is mainly limited by the error from atmospheric refraction. According to data processing parts in real time and afterwards, two correction methods are proposed respectively. And refraction error correction and residual error models are built. By experimental validation and error comparing analysis, the simple calculation process and accurate models can be got by using these two methods, and can enhance the accuracy of data processing in real time and afterwards..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 11 (2013)
Measurement Error Analysis for Scattering Cross Section of Laser Radar
ZHOU Ya-fan, LIU Ying, and YE Zong-min
The importance of information about laser radar cross section (LRCS) is introduced. According to basic conceptions, LRCS expressions and the physical meanings are analyzed. Measurement mathematic models of LRCS are deduced according to the principles of radiation transmission and electro-optical detection. The concept The importance of information about laser radar cross section (LRCS) is introduced. According to basic conceptions, LRCS expressions and the physical meanings are analyzed. Measurement mathematic models of LRCS are deduced according to the principles of radiation transmission and electro-optical detection. The concept of target coefficient such as δ is imported according to the relationships between targets and the sizes of irradiation faculae section. From some aspects such as target coefficient, criterion choices of radiation calibration, performances of laser irradiation system and laser detection system as well as atmospheric environment parameters, sources of measurement error and methods for error reducing and correcting are analyzed. And error source and influence are expressed intuitively by error tree. According to the principles of creditability, interchangeability and usability of measurement data, register requirements of measurement data are proposed and register tables of measurement data are programmed. It is an important reference to characteristics research on laser radar target scattering..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 14 (2013)
Design of Correlation Pulse Laser with High Precision and Two-path Circuit
YE Ben-zhi, WANG Gao-yong, and YE Wen
Based on the technology of complex programming logic device (CPLD) and micro-computer unit (MCU), a correlation pulse laser with high precision, multi-purpose and two-path circuit is designed. Several aspects to be considered in design are introduced. And basic design methods of MCU module, CPLD processing unit, high pBased on the technology of complex programming logic device (CPLD) and micro-computer unit (MCU), a correlation pulse laser with high precision, multi-purpose and two-path circuit is designed. Several aspects to be considered in design are introduced. And basic design methods of MCU module, CPLD processing unit, high precision clock and driving circuits are introduced. Requirements of functions and precision of the design are tested and showed by experiments..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 19 (2013)
Design of Laser Modulation Signal for CPT Magnetometer
XIONG Tian-lin, KONGXiao-jian, LEI Xuan-hua, and ZHAO Guo-hua
Coherent population trapping (CPT) magnetometer is a new high sensitive atomic optical magneometer for weak magnetic field measurement. According to low phase noise modulated signal requirements in the process of current modulation of vertical cavity surface emitting lasers (VCSEL) of the magnetometer, a scheme based oCoherent population trapping (CPT) magnetometer is a new high sensitive atomic optical magneometer for weak magnetic field measurement. According to low phase noise modulated signal requirements in the process of current modulation of vertical cavity surface emitting lasers (VCSEL) of the magnetometer, a scheme based on phase locked loop (PLL) frequency synthesizer is presented. On the basis of basic principles of CPT magnetometer, frequency requirements of modulated signal for CPT magnetometers are analyzed. According to basic principles of frequency synthesis of PLL, key module parameters in frequency synthesizers are determined by ADIsimPLL software. A 3.4 GHz frequency signal with high precision, low phase noise and good spurs is generated and simulation analysis is performed to the system. Simulation results shows that the system has good phase-locking effect, reliable performance and can meet the research of CPT magnetometer..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 23 (2013)
Characteristics Analysis for Coupling Optical Fiber Filter
CHEN Jin-peng, ZHANG Shao-xian, and LIU Chun-yu
Optical fiber filters play an important role in optical fiber communication and optical fiber lasers fabrication. Based on coupling theory analysis, spectral response of coupling optical fiber filters is tested and the relationship between tapered cycle and transmission wavelength is researched by broadband light sourcOptical fiber filters play an important role in optical fiber communication and optical fiber lasers fabrication. Based on coupling theory analysis, spectral response of coupling optical fiber filters is tested and the relationship between tapered cycle and transmission wavelength is researched by broadband light source and spectrometer building and testing system. Experimental results show that the longer tapered cycle is, the denser peak intervals of transmission wavelength is and the more sensitive spectral response is. So optical fiber filters with different transmission wavelength and filtering gap can be produced according to the property..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 28 (2013)
Research on Viewing Angle Compensation of LCD with Capacitive Touch Panel and Dispersion Characteristics of Three Primary Colors
HUANG Chong, OUYANG Yan-dong, GUO Yang-ming, and WU Yong-jun
Viewing angles of liquid crystal display (LCD) can be improved and three primary colors dispersion characteristics of red-green-blue (RGB) can be compensated by modulating polarized light with retardation film. Electro-optical characteristics of three primary colors of capacitive touch panel (CTP) LCD with and without Viewing angles of liquid crystal display (LCD) can be improved and three primary colors dispersion characteristics of red-green-blue (RGB) can be compensated by modulating polarized light with retardation film. Electro-optical characteristics of three primary colors of capacitive touch panel (CTP) LCD with and without retardation film under different driving voltages at vertical direction with different viewing angles are tested by WGD-6 optical multi-channel analyzer respectively. Experimental results show that as viewing angles increase, relative light intensity of green primary color of CTP LCD at vertical direction deviates seriously from that of red and blue primary colors. It results in obvious color deviation. Relative light intensity difference of three primary colors is reduced effectively after a retardation film is coated on the surface of CTP-LCD. So color correction and viewing angle increment can be achieved..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 32 (2013)
Research on Self-calibration Method of Binocular Camera
ZHU Shui-juan, and ZHAO Xun-jie
Camera calibration is one of the key technologies to computer vision. According to problems rom presently calibration technology such as complicated calculation process and inconvenient calibration targets usage, a self-calibration method for binocular cameras is proposed. Calibration process can be performed when therCamera calibration is one of the key technologies to computer vision. According to problems rom presently calibration technology such as complicated calculation process and inconvenient calibration targets usage, a self-calibration method for binocular cameras is proposed. Calibration process can be performed when there are two groups of orthogonal parallel line in scene. A calibration equation is built according to constraint relations among vanishing points forming in the image planes. So the intrinsic and extrinsic parameters of cameras are calculated. And structure parameters of a binocular camera are calibrated incorporating with the principle of binocular stereo vision. Comparison experiments are performed to presently laboratory equipments by the method. Experimental results show that the method is easy, effective and can be used in many fields such as research on machine vision and 3D reconstruction..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 36 (2013)
Image Sparse Inpainting Based on Directional Wavelet Transform
NING Ben-de, QU Xiao-bo, and CHEN Zhong
Image inpainting plays an improtant role in application area. As an advanced signal processing method, sparse representation has been used in image inpainting. However given image bases are adopted in tradtional methods at the process of inpainting sparse images, it has no adaptive capability and sparse representation Image inpainting plays an improtant role in application area. As an advanced signal processing method, sparse representation has been used in image inpainting. However given image bases are adopted in tradtional methods at the process of inpainting sparse images, it has no adaptive capability and sparse representation capability is limited. The best geometry direction is estimated according to reference images so that sparse transform is adaptive to geometry informations of images. And a representation method of sparser images is provided. Sparse inpainting is calculated by a minimized norm model such as l1. Experimental results show that edges and texture in images are preserved more perfectly comparing with traditional 2D wavelet transform methods. So higher peak signal to noise ratio is got..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 40 (2013)
Simulation of Magnetic Resonance Imaging on Radiation Damping Regnerative Feedback Enhancement Effect
DANG Zhao-zhao, SUN Hui-jun, and CHEN Zhong
Enhancing imaging contrast is one of the research issues in the field of magnetic resonance imaging (MRI). Radiation damping (RD) is more sensitive to small differences among samples. A new imaging contrast principle is provided through regenerative feedback enhancement radiation damping. By establishing regenerative fEnhancing imaging contrast is one of the research issues in the field of magnetic resonance imaging (MRI). Radiation damping (RD) is more sensitive to small differences among samples. A new imaging contrast principle is provided through regenerative feedback enhancement radiation damping. By establishing regenerative feedback enhancement simulation algorithm, the imaging contrast principle is simulated and analyzed at the condition of different parameters. Incorporating with a new magnetic resonance image method (iMQC), MRI characteristics under synactic effect are discussed. It is helpful to explore the applications of radiation damping in the area of MRI..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 45 (2013)
Driving Circuit Design for Electronic Multiplication CCD
BAI Yu-dong, and ZHANG Shou-cai
A design method is provided for driving circuit of electronic multiplication CCD (EMCCD). Waveforms in accordance with the requirements of EMCCD timing sequence are generated by field programmable gate array (FPGA). Level conversion is performed to FPGA output signal by EL7457 high speed metal-oxide-semiconductor fieldA design method is provided for driving circuit of electronic multiplication CCD (EMCCD). Waveforms in accordance with the requirements of EMCCD timing sequence are generated by field programmable gate array (FPGA). Level conversion is performed to FPGA output signal by EL7457 high speed metal-oxide-semiconductor field effect transistor (MOSFET) driving chip so as to meet the requirements of EMCCD driving voltage. And high voltage signals are driven by discrete push-pull amplifier circuits. Output voltage can be adjusted from 20 V to 50 V and pixel read frequency is 5 MHz. Experimental results show that EMCCD is at normal operation state in the driving circuit and effective signals are output..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 51 (2013)
Smart Home System Based on STM32
LIU Peng-fei, and LIU Yun-xue
Incorporating with modern technologies of sensor and information processing, STM32F103 is used as a control center in the system. Relative action orders such as control switch window are transmitted to a motor module on the basis of analyzing information from sensors, received by GSM module and user by hu. man-computerIncorporating with modern technologies of sensor and information processing, STM32F103 is used as a control center in the system. Relative action orders such as control switch window are transmitted to a motor module on the basis of analyzing information from sensors, received by GSM module and user by hu. man-computer interface operating. And dangerous warning information is transmitted to user mobile phone through GSM module to guarantee security and comfortableness of living. Protection and isolation measures are taken in the system. And a standby power supply is added so as to keep the switch window in operation state when the power supply is off. The smart home system has strong anti-interference ability and high reliability. And it can be applied to many areas such as smart home and intelligent agriculture..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 55 (2013)
Test and Research on Mie Scattering in Millimeter Wave
ZHANG Zi-hao, LIU Qiang-hu, and MIN Jiang
A three-dimensional fabric structure attained by three-dimensional fabricating and metalized fiber doping is researched. Its millimeter attenuation characteristics in 3 mm and 8 mm are tested and researched. And the characteristics are analyzed according to Mie scattering in electromagnetic wave and absorption theory. A three-dimensional fabric structure attained by three-dimensional fabricating and metalized fiber doping is researched. Its millimeter attenuation characteristics in 3 mm and 8 mm are tested and researched. And the characteristics are analyzed according to Mie scattering in electromagnetic wave and absorption theory. Experimental results show that echo signals in millimeter wave can be attenuated effectively by double actions of scattering and absorbing from the three-dimensional fabric structure. And the attenuation characteristics are in accordance with Mie scattering in electromagnetic wave and absorption theory..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 61 (2013)
Simulation Analysis of Heat Exhaust of Electron Equipment Chassis
SU Shi-ming, and LI Wei
Types of thermal transmission in chassis for one special electronic equipment are analyzed. Steady thermal simulation is performed by professional thermal analysis software Icepak. To calculate the temperature field when the blocked structure getting heat equilibrium, reasons that the temperature of inner devices is abTypes of thermal transmission in chassis for one special electronic equipment are analyzed. Steady thermal simulation is performed by professional thermal analysis software Icepak. To calculate the temperature field when the blocked structure getting heat equilibrium, reasons that the temperature of inner devices is above upper limited temperature are explained. Two methods for improving structures are proposed. Temperature field in chassis with vent holes on front and back panels for heat exhaust is calculated again. Calculation results show that the highest temperature in inner devices is in permitted operation temperature range. So the temperature in chassis is reduced effectively to ensure the equipments in stable and reliable operation states. And structure design and improvement effectiveness are enhanced..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 64 (2013)
Electro-optical Tracker Testing Based on Simulation Video
LIU Zhen-yang, and WANG Yi
A testing scheme for electro-optical trackers based on simulation videos is introduced. At first the simulation videos are produced and edited, and then downloaded to video output cards through peripheral component interconnect (PCI) bus and transmitted to trackers. By contrasting the quantity of missing the targets ofA testing scheme for electro-optical trackers based on simulation videos is introduced. At first the simulation videos are produced and edited, and then downloaded to video output cards through peripheral component interconnect (PCI) bus and transmitted to trackers. By contrasting the quantity of missing the targets of trackers in real time, target centroid coordinates of simulated images and center coordinates of images, tracking accuracy and stability of trackers are determined so as to test trackers..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 68 (2013)
Simulation Research on IR Target Imaging Based on Vega
WANG Zhi-gang, FU Xin, and SHANG Ju-bang
Based on Vega, a simulation research on IR target imaging is developed. IR radiation models of aircraft skin, exhaust nozzle and flame are analyzed respectively. Incorporating with the IR radiation models, the design flow of IR target imaging simulation are introduced in detail by using some simulation tools such as VeBased on Vega, a simulation research on IR target imaging is developed. IR radiation models of aircraft skin, exhaust nozzle and flame are analyzed respectively. Incorporating with the IR radiation models, the design flow of IR target imaging simulation are introduced in detail by using some simulation tools such as Vega three-dimensional view simulation tool, texture material mapper (TMM) tool, mosart atmospheric tool (MAT), Creator three-dimensional modeling tool and VC++6.0 developing tool. And IR target simulation images are given. It provides references for similar IR imaging systems..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 73 (2013)
Application of Orthogonal Experiment in Software Test Case Design
HE Miao, and ZHU You-de
Because the scale of software is getting larger and larger, a certain test coverage rate shall be got during software test and the quantities of generated test cases are great. In order to assign limited test resource reasonably, a case generation method for software test based on orthogonal experiment is proposed. BasBecause the scale of software is getting larger and larger, a certain test coverage rate shall be got during software test and the quantities of generated test cases are great. In order to assign limited test resource reasonably, a case generation method for software test based on orthogonal experiment is proposed. Basic conceptions of orthogonal experiment are introduced. Incorporating with the characteristics of orthogonal method, applicability and operation process of orthogonal experiment in the area of design software test case are discussed. And an example is given finally. Experimental results show that fewer quantities of test cases are generated and good test effect is got..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 77 (2013)
Design and Implementation of Simulation Test Software Based on 1553B Bus
WANG Ke, ZHANG Yu, HA Si, and PU Yuan-yuan
The characteristics of 1553B and data structure bus are introduced. With PCCARD-1553B board of PCMCIA interface from Condor company and application program interface (API) function with source code level supporting the board, design ideas, methods and detailed processes for simulation test software with a bus controlleThe characteristics of 1553B and data structure bus are introduced. With PCCARD-1553B board of PCMCIA interface from Condor company and application program interface (API) function with source code level supporting the board, design ideas, methods and detailed processes for simulation test software with a bus controller terminal based on a general 1553B bus interface are proposed. The software is used to test special avionics equipments. It has high reliability and good adaptability and can meet different test requirements..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 3, 80 (2013)
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