Journals >Electro-Optic Technology Application
Contents
2015
Volume: 30 Issue 3
19 Article(s)
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Research Article
Optimized Design of Optical Lens of Star Tracker
WANG Li-qiu, TIAN Ming, and Cui Shi-bao
In the star light guidance of space vehicles, the optical lens design requirements for star tracker are critical to determine accurately the spatial location information and to improve the accuracy of navigation system. A new type of star tracker optical lens system is designed according to the requirements and the opeIn the star light guidance of space vehicles, the optical lens design requirements for star tracker are critical to determine accurately the spatial location information and to improve the accuracy of navigation system. A new type of star tracker optical lens system is designed according to the requirements and the operation principle is presented. With the optical design and difference analysis, the optical system distortion is less than 0.2%, the axial spherical aberration is less than 0.1, which can meet the demand for high-precision astronomical navigation system..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 1 (2015)
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 1 (2015)
Design and Optimization for Infrared Optical System Based on ZEMAX
WU Yan-zhuo, and MA Hong-xia
The research significance of the optical system is described, and the basic design principle is determined. Gaussian optical structure model and design of a collimator and a telescope are performed. The detailed mathematical models are established and calculated. Based on target coupling optical path structure, ZEMAX sThe research significance of the optical system is described, and the basic design principle is determined. Gaussian optical structure model and design of a collimator and a telescope are performed. The detailed mathematical models are established and calculated. Based on target coupling optical path structure, ZEMAX software is used to design the optimum optical system. The result is evaluated and the conclusion is drawn. The field test issues of infrared precision guided system dynamic tracking characteristic are solved through the system. The development of infrared blackbody tracking target ground equivalent testing is promoted to provide a very important hardware support to the improvement of simulation technology performance..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 5 (2015)
Laser Fence Detection Technology
LI Man, and XU Hong
According to the stealth characteristics of stealth aircraft, a laser fence technology, as a new target detection method, using distributed laser active scanning and laser echo receiving to perform warning detection is proposed. The principles of laser fence technology and the composition of transmitting and receiving According to the stealth characteristics of stealth aircraft, a laser fence technology, as a new target detection method, using distributed laser active scanning and laser echo receiving to perform warning detection is proposed. The principles of laser fence technology and the composition of transmitting and receiving sub-system are introduced. According to flight parameters of typical stealth aircraft in foreign countries, 17.3 km interval is used to design laser transmitting and receiving devices to design the parameters of the transmitting sub-system in the laser, such as laser optical beam scanning angle, repetition rate, pulse width, 3.2 mJ single pulse energy and average power. The calculation results show that the method can meet the detection demand of a stealth aircraft with 15 km flight altitude and 1.5 Ma flight speed..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 11 (2015)
Transmission Characteristics of Wide-band Laser Pulse in Fiber Laser
DENG Yi, WANG Yuan-yuan, DONG Hui, and LEI Da-jun
The formation of soliton in the passively mode-locked fiber laser based on nonlinear polarization rotation technology is simulated numerically and investigated experimentally. The results show that due to the cavity pulse peak clamping effect, stable solitary waves can still be obtained in the laser which is described The formation of soliton in the passively mode-locked fiber laser based on nonlinear polarization rotation technology is simulated numerically and investigated experimentally. The results show that due to the cavity pulse peak clamping effect, stable solitary waves can still be obtained in the laser which is described by the Maxwell-Bloch Equation. The higher density of the clamped soliton is, the wider frequency is. With the clamped density is increased, the soliton density is not increased, and the new soliton is formed..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 14 (2015)
New Method of All-optical Networking Based on Optical Fiber Laser Phased-array Technology
XU Lei, MA Wan-zhuo, and LI Xin
A new method of all-optical networking using fiber laser phased-array sources in deep space communication is proposed. The far-field relative intensity chart of 1.55 μm fiber laser phased-array sources in deep space communication is simulated. The scanning angle is controlled through adjusting the phases between array A new method of all-optical networking using fiber laser phased-array sources in deep space communication is proposed. The far-field relative intensity chart of 1.55 μm fiber laser phased-array sources in deep space communication is simulated. The scanning angle is controlled through adjusting the phases between array elements and the scanning angle is 0.990 9° when the wavelength, core radius, array elements number and spacing are 1.55 μm, 10 μm, 2×2, 80 μm respectively. Simulation results show that the fiber laser phased-array sources have advantage of dynamic angle scanning in high speed communication for deep space all-optical networking..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 17 (2015)
Heat Sink Design of High Power Semiconductor Laser
LI Ya-jing, and PENG Hai-tao
When the laser diodes working, the losses of various non-radiating recombination and free carrier absorption are inevitable, so portion of the electrical power is converted into heat dissipation, which caused direct impact on the efficiency and lifetime of the laser. So the heat treatment has been a focus of attention.When the laser diodes working, the losses of various non-radiating recombination and free carrier absorption are inevitable, so portion of the electrical power is converted into heat dissipation, which caused direct impact on the efficiency and lifetime of the laser. So the heat treatment has been a focus of attention. The micro channel heat sink is used to solve the problem of heat dispersing when the high power semiconductor laser array working, the structure parameters of the micro channel heat sink is optimized by using the ANSYS simulation software, and the thermal resistance of the high power semiconductor laser array is tested..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 23 (2015)
Infrared Target Detection Based on K-means Clustering
HUANG Xiao-peng, and LAN Ying-qiao
Target detection is an important part of infrared image processing, and the subsequent processing is directly affected by the detection results. On the basis of analyzing the characteristics of infrared images, an improved Top-Hat operator is adopted to suppress the noise points in infrared images. And according to traTarget detection is an important part of infrared image processing, and the subsequent processing is directly affected by the detection results. On the basis of analyzing the characteristics of infrared images, an improved Top-Hat operator is adopted to suppress the noise points in infrared images. And according to traditional K-means clustering idea, K-means clustering target detection algorithm based on two-dimensional gradient information is proposed. Experimental results show that the method has distinctly noise suppression effect, and the target in infrared images is well detected, which lays a good foundation for the subsequent image processing..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 29 (2015)
Research on Infrared Imaging Precision Tracking Algorithm Based on Information Points
WANG Xun
The optimal ladder type edge detection algorithm is researched. Gauss filter is used to smooth images and the finite difference of the first order partial derivative is used to calculate the gradient magnitude and the direction of each pixel. Non maximum value suppression is performed to gradient amplitude and double tThe optimal ladder type edge detection algorithm is researched. Gauss filter is used to smooth images and the finite difference of the first order partial derivative is used to calculate the gradient magnitude and the direction of each pixel. Non maximum value suppression is performed to gradient amplitude and double threshold algorithm is used to detect edges, which avoids double borders or unclosed area problems from other operators. Sinusoidal encoding method is used to convert infrared gray images to pseudo color images, and then the temperature jump area from the fuselage front to the engine is obtained. And the center of the area is taken as a tracking point to finish missile terminal guidance..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 33 (2015)
Time Synchronous Technology of Opto-electronic System
WANG Chang-long, and GONG Hua
A kind of time synchronous technology used in opto-electronic systems is proposed to realize information fusion and coordination driving of multi-sensor. Based on satellite time transmission and IEEE1588 standard, the hardware can be embedded in opto-electronic system. The opto-electronic system characteristics improveA kind of time synchronous technology used in opto-electronic systems is proposed to realize information fusion and coordination driving of multi-sensor. Based on satellite time transmission and IEEE1588 standard, the hardware can be embedded in opto-electronic system. The opto-electronic system characteristics improvement from synchronous technology is analyzed, such as the battlefield information can be obtained rapidly and accurately by the opto-electronic system with time synchronous information, the reliability and spatial resolution of the system are improved, and the accuracy and reliability of the data are enhanced. So the detection and operation performance are improved..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 36 (2015)
Research on Analysis Methods of Turbojet Engine Telemetry Data Based on Wavelet Transform
LIANG Yan, and CHEN Guo-sen
Due to the limited telemetry data for the turbojet engine during the flight test, it is difficult to locate accurately the turbojet engine’s fault. After the de-noising extraction with wavelet transform of the data, such as speed of the turbojet engine, former pressure of nozzle etc, the singularity is found and the daDue to the limited telemetry data for the turbojet engine during the flight test, it is difficult to locate accurately the turbojet engine’s fault. After the de-noising extraction with wavelet transform of the data, such as speed of the turbojet engine, former pressure of nozzle etc, the singularity is found and the data file is formed through the system noise filtering. Using the BP network pattern classification function, the moment of failure occurs and default parts are detected. With the ground test database in the development process, it can locate accurately the turbojet engine defaults parts and types. The results show that the method is effective and can be applied in other subsystem fault analysis..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 40 (2015)
Test Program Set Design for Equipment without Special Test Interface
WANG Jian, and GAO Ying
According to the problem of low fault isolation rate for single line replaceable unit (LRU) during test program set (TPS) testing of the equipment without special test interface, test signal parallel extraction technology is adopted. Test hardware such as test adaptation module of LRU is developed. The test signal fromAccording to the problem of low fault isolation rate for single line replaceable unit (LRU) during test program set (TPS) testing of the equipment without special test interface, test signal parallel extraction technology is adopted. Test hardware such as test adaptation module of LRU is developed. The test signal from LRU is parallel extracted to automatic test equipment to perform test analysis, and signal LRU fault isolation is reliably realized, while the problem of test signal distortion from signal parallel is solved using dynamic library data analytic technology in test programs. And the accuracy of test signal parameter analytic is improved..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 45 (2015)
FPGA Array CMOS Image Sensor Acquisition Multi-moded System
ZOU Jian, WANG Chao, YANG Wei-qing, TANG Xi-wen, and HE Jian-long
A CMOS Image Sensor Acquisition Multi-Mode System development is designed based on a FPGA array. The development and mode-switching of three kinds of modes such as ordinary mode, speed mode and TDI mode are studied. Based on the principle and characteristics of CMOS array sensor, the design of chip and the external cirA CMOS Image Sensor Acquisition Multi-Mode System development is designed based on a FPGA array. The development and mode-switching of three kinds of modes such as ordinary mode, speed mode and TDI mode are studied. Based on the principle and characteristics of CMOS array sensor, the design of chip and the external circuit are suitable for the realization of CMOS array acquisition of three modes selection. After analyzing characteristics of CMOS array acquisition under the three modes, the hardware circuit based on FPGA chip are used as the core control of the whole system, and the internal function modules of the FPGA chip are divided with the Verilog language, which including the simulation of the SCCB protocol to complete the register CMOS sensor configuration, open up the cache synchronization FIFO, RAM etc. The USB chip firmware and driver of computer are designed, the image data are processed and displayed with mixed VB and MATLAB..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 49 (2015)
Solar Charge Controller Based on Single-chip Microcomputer
LI Zuo-wen, and YU Hai-yue
For the current solar charging controller’s insufficient protection to the battery, the battery’s life span is shortened, a kind of solar charging controller program based on Atmega16 is researched. Atmega16 with low-power and high performance is used as the core device to control the entire circuit. System hardware ciFor the current solar charging controller’s insufficient protection to the battery, the battery’s life span is shortened, a kind of solar charging controller program based on Atmega16 is researched. Atmega16 with low-power and high performance is used as the core device to control the entire circuit. System hardware circuit consists of solar battery charging circuits, voltage acquisition and display circuits, single-chip microcomputer control and RS-485 serial communication circuits, which mainly realize the acquisition and display of battery voltage. Software is based on pulse width modulation (PWM) strategy, PWM control signal is outputted from single-chip microcomputer through programming. The control of turning on and off for power switching device metal oxide semiconductor (MOS) tube is realized by the control signal so as to control charging battery through solar plate. According to the requirements of the controller, software program is programmed and battery charging efficiency is realized by the software, which makes the battery no in overcharge and over discharge state. So the battery is protected and the service life of the battery is prolonged..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 54 (2015)
Research on Radial Polarized Light and Method of Detection
CHEN Heng, HAN Jian, GU Jun-da, LIU Tao, MA Wan-zhuo, SUN Hong-wei, and XU Lei
Radial polarized light has a polarization structure of axial symmetry, after passing by the high numerical aperture of converging lens, it is provided with a strong longitudinal electric field gradient and the ability to go beyond the diffraction limit, and the greater the electromagnetic field strength of light waves Radial polarized light has a polarization structure of axial symmetry, after passing by the high numerical aperture of converging lens, it is provided with a strong longitudinal electric field gradient and the ability to go beyond the diffraction limit, and the greater the electromagnetic field strength of light waves is, the higher the material power among the light waves is. A method with the use of POLARIZATION AXIS FINDER to generate radial polarized light was put forward. The quality of radial polarized light was tested by the detection device of polarized light. And the results show that by this way, the polarized light has the characteristics of high axial symmetry and well-proportioned distribution for each point along the direction of radial polarized light..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 58 (2015)
Research on Equivalent Phase-shifted Fiber Bragg Grating’s Reflection Spectrum Characteristics
WANG Xiao-rui, and GU Jian
The principle of equal-phase shifted fiber Bragg grating is that by introducing a spatial shift at certain position of sampling fiber Bragg grating, equivalent phase shift can be achieved in different frequency channel after Fourier transformation. Firstly, the fiber Bragg grating Turan transmission matrix is used to pThe principle of equal-phase shifted fiber Bragg grating is that by introducing a spatial shift at certain position of sampling fiber Bragg grating, equivalent phase shift can be achieved in different frequency channel after Fourier transformation. Firstly, the fiber Bragg grating Turan transmission matrix is used to perform number simulation, and all kinds of phase shifted fiber Bragg grating’s properties are verified in equal-phase shifted fiber Bragg grating. Secondly, according to the report that -2 grade fiber Bragg grating has low reflectivity and equal-phase shifted state can’t be realized, a method for realizing -2 grade equal-phase shifting is proposed and relative verification is performed. Finally, the relationship curve of equal-phase shifted fiber Bragg grating reflectivity changing with length is given..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 62 (2015)
Magnetron Sputtering Method for VO2 Thin Film and Resistance Mutation Test
WANG An, XU Wei-dong, ZHANG Bao-shan, YANG Jun-tang, and CUI Guang-zhen
Vanadium dioxide (VO2) films with the phase changing characteristic are prepared on the silicon substrate (100) by the reactive magnetron sputtering at room temperature and heat treatment process. XRD and SEM are used to characterize the phase structure and surface morphology of the thin films. After heat treatment, fiVanadium dioxide (VO2) films with the phase changing characteristic are prepared on the silicon substrate (100) by the reactive magnetron sputtering at room temperature and heat treatment process. XRD and SEM are used to characterize the phase structure and surface morphology of the thin films. After heat treatment, film grain began to grow, and at the 2θ=27.9°、37.1°、42.3°, the(011), (200), (210) diffraction peak values of VO2 are presented respectively. The morphology of film is compact and uniform. The square resistance of variable temperature testing is analyzed, and after the phase changing, the film resistance mutation is up to 3 orders of magnitude. And the application prospect of VO2 film in the field of camouflage is also analyzed..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 67 (2015)
Design of Measuring Equipment to Explore Solid Linear Expansion Coefficient Based on Aplanatism Method
LI Ru-song, SUN Ji-yuan, and XU Qin
Based on the principle that the Michelson interferometer can be used to measure the slight variation in length, a device for accurate measurement of thermal expansion coefficient of solid material line by using the method of equal optical path is revised and designed. The basic idea is that two pieces of mirror on origBased on the principle that the Michelson interferometer can be used to measure the slight variation in length, a device for accurate measurement of thermal expansion coefficient of solid material line by using the method of equal optical path is revised and designed. The basic idea is that two pieces of mirror on original Michelson interferometer are converted into moving mirror, are put on the new added rail, and are connected with one end of the tested metal rod. When the metal rod is heated, it will lengthen slightly, which drives the moving mirror to produce a slight movement. By adjusting and observing the demarcation point of the interference fringes’ “indentation” and “emission” on the observation screen before and after heating, the micro change of the shape of the metal rod can be determined.?And then, the coefficient of linear thermal expansion of the tested metal rod is calculated according to the formula. The method overcomes the defects of traditional fringe method, and can realize the accurate measurement of the coefficient of linear thermal expansion of the metal rods. This method has the advantages of simple in operation and practical..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 70 (2015)
Research on Radiation Characteristic Testing of Special Material Decoy
LI Yong, and YIN Qing-guo
For infrared imaging guidance missile, special material decoy is a kind of jamming method with higher efficiency cost ratio, which has promising application prospects. For effective jamming, the infrared radiation characteristics of the decoy must meet the requirements. The jamming effectiveness of the decoy is analyzeFor infrared imaging guidance missile, special material decoy is a kind of jamming method with higher efficiency cost ratio, which has promising application prospects. For effective jamming, the infrared radiation characteristics of the decoy must meet the requirements. The jamming effectiveness of the decoy is analyzed. The relative testing methods for spectrum characteristics, radiation strength, time-domain characteristics and radiation area are analyzed. Some examples are presented, which provides technical support for the design and evaluation of the special material decoy..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 30, Issue 3, 74 (2015)
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