Journals >Electro-Optic Technology Application
Contents
2013
Volume: 28 Issue 2
19 Article(s)
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Research Article
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 1 (2013)
Active Infrared Correlated Electro-optical Burglar Alarm
WEI Zhong-chao, LIAO Jun-hong, ZHANG Zhun, DAI Qiao-feng, LU Guan-hua, and LIANG Rui-sheng
An active correlated infrared electro-optical detection alarm system is designed. It includes infrared detection and signal processing systems. Two correlated LH-A electro-optical switches with 3 m detection distance are used as intrusion detectors. When the modulated infrared light beam from the electro-optical switchAn active correlated infrared electro-optical detection alarm system is designed. It includes infrared detection and signal processing systems. Two correlated LH-A electro-optical switches with 3 m detection distance are used as intrusion detectors. When the modulated infrared light beam from the electro-optical switches is obstructed by an object, a switch signal will be produced. The signal is sent to AT89 micro-computer unit (MCU). After processing and judging, an alarm for passing objects at special directions is given out. And the alarm system can be used as a flow counter. The system has the advantages of high reliability, good stability and anti-interference..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 1 (2013)
Design and Production of Integrated Micro-optics Tag System
LI Zhi-peng, and LIANG Zhong-cheng
With the application of internet of things technology and popularization of mobile phones, an integrated micro-optics tag system based on Bokode tag principle is designed and produced in order to use micro-optics tags in a low cost and on a large scale. Integrated modes such as micro 2D barcode integrated with small leWith the application of internet of things technology and popularization of mobile phones, an integrated micro-optics tag system based on Bokode tag principle is designed and produced in order to use micro-optics tags in a low cost and on a large scale. Integrated modes such as micro 2D barcode integrated with small lens array are used at transmitting terminals. Ordinary mobile phone camera is used at receiving terminal to receive micro 2D barcode image and decode software in mobile phones is used to decode..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 5 (2013)
Research on Calibrating Method of Photo-electric Tracing Equipment Using Integrated Photo-electric Target
Wang Ji-guang, Li Jin-liang, Bai Yun-ta, and Gao Wen-jing
In order to improve the measurement accuracy of photo-electric tracing equipment, the calibration method of several parameters of the photo-electric tracing equipment is studied by using integrated photo-electric target in the field. The calibration involves TV, IR and Laser ranging. Pixel analysis is used so that multIn order to improve the measurement accuracy of photo-electric tracing equipment, the calibration method of several parameters of the photo-electric tracing equipment is studied by using integrated photo-electric target in the field. The calibration involves TV, IR and Laser ranging. Pixel analysis is used so that multiple indica. tors of photo-electric tracing equipment can be calibrated and corrected more accurately. The correction results of some parameters are given out. The optical axis parallelism is better than 0.2 mrad. The field calibration is close to the real. Therefore, it has a higher degree of confidence than indoor..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 9 (2013)
Design of Cooled Mid-infrared Athermal Zoom Optical System with Ratio of 30
GAO Jin-hong, FU Yue-gang, LIU Zhi-ying, and HOU Zhen-yan
On the basis of cooled staring focal plane array (FPA) detectors with 640×512 pixel and 20 μm pix. el elements, a mid-infrared continuous zoom optical system with 30 zoom ratio is designed. Operation waveband of the system is 3.7~4.8 μm, F number is 3.7 and focal length range is from 11.64 to 349.2 mm. The system On the basis of cooled staring focal plane array (FPA) detectors with 640×512 pixel and 20 μm pix. el elements, a mid-infrared continuous zoom optical system with 30 zoom ratio is designed. Operation waveband of the system is 3.7~4.8 μm, F number is 3.7 and focal length range is from 11.64 to 349.2 mm. The system includes two parts such as a zoom system and a re-imaging system, which includes 12 lenses. Main function of the re-imag. ing system is to realize 100% cooled diaphragm efficiency and reduce radial size of optical systems. Space resolu. tion of the system can be 21 lp/mm and the energy concentration rate is above 75% in 25 μm. And imaging quality of the system is much better. Optical passive athermal design is realized in the range of -40~+60 ℃..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 13 (2013)
Fusion of Infrared Polarization and Intensity Images Based on DWT
AN Fu, YANG Feng-bao, LI Wei-wei, and ZHOU Xiao
A fusion algorithm of infrared polarization and intensity based on discrete wavelet transform (DWT) is put forward. DWT is adopted in the algorithm to decompose a source image into multi-scale images. Then the low frequency sub-band coefficient is fused by the local energy. And the high frequency sub-band coefficient iA fusion algorithm of infrared polarization and intensity based on discrete wavelet transform (DWT) is put forward. DWT is adopted in the algorithm to decompose a source image into multi-scale images. Then the low frequency sub-band coefficient is fused by the local energy. And the high frequency sub-band coefficient is fused by eliminating high frequency noise and incorporating with local mean square error rule. The reconstructed fusion images are got finally through inverse transformation. Experimental results show that local standard deviation, roughness, contrast and local entropy are increased by 1.1%, 3.0%, 15.2%, 2.6% respectively comparing with the fusion rules of weighted average and the largest absolute value. So the fusion method has a certain advantage and reality..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 18 (2013)
Research on General Algorithm and Software Implementation of Fiber Laser
LIU Zhen
Combining with equation theories of laser rate and propagating equations of pump and signal light in fiber lasers, a general traveling-wave theory model which is suitable to fiber lasers with line-shaped and ring-shaped cavity is proposed. And continuous wave (CW), active and passive Q-switched output can be simulat. eCombining with equation theories of laser rate and propagating equations of pump and signal light in fiber lasers, a general traveling-wave theory model which is suitable to fiber lasers with line-shaped and ring-shaped cavity is proposed. And continuous wave (CW), active and passive Q-switched output can be simulat. ed. Comparing with traditional point models, the model has higher accuracy in theory for considering more ele. ments such as non-uniform distribution characteristic of pump and signal light in cavities as well as the influence on laser from different losses such as transmission and connection and non-doped fiber. According to finite differ. ence method (FDM), the numerical algorithm of traveling-wave model is educed. And the algorithm is implement. ed by VC 6.0 and hybrid programming technology of C/C++ and mideva. Numerical simulation analysis software with high operation efficiency and flexibility for fiber lasers is obtained finally. And plenty of dynamic operation in. formation of lasers is simulated by the software..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 23 (2013)
Single-mode Single-polarization Fiber Laser with Flattened Fundamental Mode in Large-mode-area
BAI Xin, and WANG Chun-can
For performing single mode (SM) single polarization (SP) operation in fiber lasers with flattened fundamental (FM) mode in large-mode-area, a method for obtaining SMSP signals with FM mode is presented. Two passive fiber cores with elliptical air holes are inserted into layers of fibers with FM mode. The cores are placFor performing single mode (SM) single polarization (SP) operation in fiber lasers with flattened fundamental (FM) mode in large-mode-area, a method for obtaining SMSP signals with FM mode is presented. Two passive fiber cores with elliptical air holes are inserted into layers of fibers with FM mode. The cores are placed on both sides of an active core region with 20 μm diameter symmetrically and elliptical air holes are used to import birefringence. According to numerical simulation, when the active fiber is used as the gain medium of fiber lasers with FM mode, only polarization fundamental mode in x direction will be output by fiber lasers without choosing other modes..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 27 (2013)
Research on Laser-induced Damage to Silica Glass by Nanosecond Laser in Vacuum Condition
LIU Qiang-hu, WANG Bi-yi, LI Jian-feng, and ZHANG Xiao-guang
Experimental methods of laser irradiation effect in simulation space condition are introduced. Experimental platforms are built and laser-induced damage experiments are performed to silica glass by YAG laser with nanosecond pulse high peak power. Laser-induced damage thresholds of silica glass in low and high vacuum coExperimental methods of laser irradiation effect in simulation space condition are introduced. Experimental platforms are built and laser-induced damage experiments are performed to silica glass by YAG laser with nanosecond pulse high peak power. Laser-induced damage thresholds of silica glass in low and high vacuum condition are measured respectively. The morphology and chemical compositions of micro-region in damage speckle are compared and analyzed. The function of laser pulse energy deposition and the express of shock wave expansion pressure are given. Corresponding damage morphology and reasons of threshold change are explained. Experimental results are in accordance with theoretical analysis..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 32 (2013)
Demodulation System of Bragg Fiber Grating Based on Filter
PANG Qi, and WANG Xi-chang
According to ratios of filter light and reference light and the relationships of wavelength, changes of external physical quantities are determined caused by changes of ratios. It is the principle of FBG demodulation of linear filters. For traditional filter demodulation system, the relationships between wavelength andAccording to ratios of filter light and reference light and the relationships of wavelength, changes of external physical quantities are determined caused by changes of ratios. It is the principle of FBG demodulation of linear filters. For traditional filter demodulation system, the relationships between wavelength and ratios are processed in linearity. And curves of linear filters are not entirely linear. In the experiment, deduced ratios in theory are directly proportional to the transmissivity of filters. Temperature, ratios corresponding to strains and wavelength are processed separately. When a strain is zero and temperature changes, a high-order item is added during data fitting process, wavelength and ratios are processed in nonlinearity. When the temperature is a constant but pressure changes, wavelength and ratios are processed in linearity. Fitting results show that curves of wavelength and ratio are similar to filtering curves and wavelength differences are equal corresponding to the same ratios at different temperature curves..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 36 (2013)
Research on GPRS Data Transmission System Based on Linear Filtering Demodulation System
XU Wen-jun, YANG Shang-ming, and WANG Zhong-xun
According to ratio changes of reference and filtering light paths, changes of outdoor temperature are estimated by a demodulation system based on linear filters. In experiments, the influence from changes of outdoor temperature on its transmittance is eliminated by constant temperature control on linear filters. ElectrAccording to ratio changes of reference and filtering light paths, changes of outdoor temperature are estimated by a demodulation system based on linear filters. In experiments, the influence from changes of outdoor temperature on its transmittance is eliminated by constant temperature control on linear filters. Electro-optical con. version is performed to the collected optical signals and AD collection module is used to collect. Ratios of two light paths, images for monitoring environment and video information are transmitted in radio by on-line monitoring systems through general packet radio service (GPRS) network finally. The collected information is transmitted to host PC for displaying and processing data and image information. And remote, real time and on-line monitoring on temperature in special environment is realized by the demodulation system..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 40 (2013)
New Algorithm for Peak Alignment of Nuclear Magnetic Resonance
HUANG He, DENG Ling-li, ZHOU Ling, and DONG Ji-yang
Peak alignment is an important step during metabolomics data pretreatment process based on nucle. ar magnetic resonance (NMR) and its effect plays a direct role on subsequent multivariate statistical analysis. A peak alignment algorithm based on Gaussian smoothing (GPA) is presented. Spectrum signals can be smoothed onPeak alignment is an important step during metabolomics data pretreatment process based on nucle. ar magnetic resonance (NMR) and its effect plays a direct role on subsequent multivariate statistical analysis. A peak alignment algorithm based on Gaussian smoothing (GPA) is presented. Spectrum signals can be smoothed on multiple scales by adjusting sizes of the windows of Gaussian convolution function. And peak alignment can be re. alized step by step from coarse to fine. The true experiment results of NMR spectrum show that peak alignment can be realized quickly and accurately by GPA algorithm. Comparing with common peak alignment algorithms such as correlation optimized warping (COW) and multi-scale peak alignment (MSPA), the aligned spectrum signals are su. perior at integrated performances such as average similarity and explanation performances of subsequent statistical models obviously..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 51 (2013)
Grouped Decision Algorithm Based on Sequence Image
CAI Jun, ZHANG Shang-yue, WANG Shu-xiao, and LIU Xiao-Guang
According to the problem of low detection rate for single frame image during the small moving in. frared target detection process, on the basis of analyzing the characteristics of infrared images of small moving tar. gets, a method for detecting small infrared targets based on sequence image grouped decision is put forAccording to the problem of low detection rate for single frame image during the small moving in. frared target detection process, on the basis of analyzing the characteristics of infrared images of small moving tar. gets, a method for detecting small infrared targets based on sequence image grouped decision is put forward. Image difference method is used to extract target information. Edges of images are expanded and centroid of connected do. mains is chosen to construct sliding neighborhood blocks. Decisions of target positions are made by making full use of continuity of target tracks and random distribution characteristics of noise finally. The experiments prove that the detection method of sequence image has a higher detection rate than that of single frame image detection method..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 55 (2013)
Weak Signal Inspection of Electromagnetic Log Sensor on Ship
WANG Peng-fei, and LUO Jun
Inspection circuits of electromagnetic log velocity measurement sensor for weak signals are designed. The signals are processed by spectrum analysis and cross correlation operation method. Comparing with the present methods of sensor signal process, the method has the characteristics of high accuracy, good noise suppreInspection circuits of electromagnetic log velocity measurement sensor for weak signals are designed. The signals are processed by spectrum analysis and cross correlation operation method. Comparing with the present methods of sensor signal process, the method has the characteristics of high accuracy, good noise suppression, small inspection circuits and easy to carry. It is helpful to inspect the operation states of sensors..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 59 (2013)
Design and Implementation of Hardware Communication Circuit in Infrared Thermal Imaging System
YANG Jin-bao, YANG Hua, ZHANG Ting, LUO Yuan-hong, ZHU Min, and LIU Huan
Hardware communication circuits based on field-programmable gate array (FPGA) module on im. age processing boards of infrared thermal imaging systems are designed and implemented. Serial communication and first-in-first-out (FIFO) reading and writing modes are used in the circuits. On one hand, control data from PC areHardware communication circuits based on field-programmable gate array (FPGA) module on im. age processing boards of infrared thermal imaging systems are designed and implemented. Serial communication and first-in-first-out (FIFO) reading and writing modes are used in the circuits. On one hand, control data from PC are received and replied in real time by communication circuits. On the other hand, control information interchange is performed through FIFO and data signal processor (DSP) module on image processing boards to form bidirection. al communication links among modules. Special serial communication chips such as TL16CP754 used on tradition. al image processing boards are not adopted in the design. Functions of the chips are realized by FPGA, so the de. sign area and cost are saved. Integration and stability of the system is improved. It is easy to be a miniature and low cost system. Simulation and experiment results show that the design is correct and the system works stably..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 62 (2013)
Design and Experiment of Micro-biochemical Detector Test System Based on Micro-spectrometer
HUANG Xiao, WEN Zhi-yu, LIAO Hai-yang, LIU Nian-ci, and WU Wei-xin
According to the requirements for detecting human biochemical parameters quickly and accurately in field, based on MOMEMS and embedded technology, a micro-biochemical detector test system based on micro-spectrometer is designed. The system includes optical system modules, linear spectral scanning system modules and steAccording to the requirements for detecting human biochemical parameters quickly and accurately in field, based on MOMEMS and embedded technology, a micro-biochemical detector test system based on micro-spectrometer is designed. The system includes optical system modules, linear spectral scanning system modules and stepping motor control system modules based on embedded ARM9. And the light intensity repetition experiment of a micro-biochemical detection system is performed. Experimental results show that the system has high detection accuracy, fast spectral scanning speed and low power consumption. Continuous spectrum detection in the range of detection wavelength is realized and application requirements of micro-biochemical detectors are met..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 67 (2013)
Research on Switch Window of TOAD with Unidirectional and Bidirectional Control Pulse
SHI Wan-Jun, and LI Tang-Jun
Asymmetric shortcomings and production principles of structure switch window of terahertz optical asymmetric demultiplexer (TOAD) with unidirectional control pulse are researched in detail. The shortcomings are well resolved by the TOAD structure of bidirectional control pulse on the basis of theoretical analysis and oAsymmetric shortcomings and production principles of structure switch window of terahertz optical asymmetric demultiplexer (TOAD) with unidirectional control pulse are researched in detail. The shortcomings are well resolved by the TOAD structure of bidirectional control pulse on the basis of theoretical analysis and optisystem simulation. The simulation results show that the switch windows with symmetric waveform and higher contrast are got by bidirectional control pulse TOAD. And double peak phenomena in simulation process are explained..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 71 (2013)
Design and Simulation of FSM System Based on PSD
WANG Kai, and WANG Jin
A fast mirror (FSM) system based on position sensitive detector (PSD) is introduced. The mechanical structure of the system is analyzed and designed. Incomplete differential proportional-integral-differential (PID) algorithm is used as a control strategy to remove the mechanical resonant peak with low frequency from FSA fast mirror (FSM) system based on position sensitive detector (PSD) is introduced. The mechanical structure of the system is analyzed and designed. Incomplete differential proportional-integral-differential (PID) algorithm is used as a control strategy to remove the mechanical resonant peak with low frequency from FSM system. So the functions of fast response and wide bandwidth control of the FSM are realized. The corrected system has the characteristics of short step response time and high tracking precision through simulation verification..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 76 (2013)
Influence of Chaff Characteristic on Dispensing Tactic
YANG Chao
Jamming and self-protection tactics of airborne chaff dispensing are introduced. During chaff opera. tion process, elements for improving jamming effect based on chaff characteristics are discussed.Jamming and self-protection tactics of airborne chaff dispensing are introduced. During chaff opera. tion process, elements for improving jamming effect based on chaff characteristics are discussed..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 28, Issue 2, 80 (2013)
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