Journals >Electro-Optic Technology Application
Contents
2017
Volume: 32 Issue 6
19 Article(s)
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Research on Characteristics of Cat Eye Echo in Damage Process of Charge-coupled Device
ZHANG Ming-xin, NIE Jin-song, SUN Ke, BIAN Jin-tian, HAN Min, and ZHANG Lei
At first, the development process of the laser active detection method based on the cat's eye effect is introduced and the influence of the factors including the focus-deviations, detection distance and atmospheric turbulence on the cat's eye echo is analyzed. And then, the research process and status of laser At first, the development process of the laser active detection method based on the cat's eye effect is introduced and the influence of the factors including the focus-deviations, detection distance and atmospheric turbulence on the cat's eye echo is analyzed. And then, the research process and status of laser damage charge-coupled device (CCD) are introduced and the mechanism and effect of laser damage CCD are analyzed. At last, the method of detecting the damage degree of CCD by cat's eye effect is introduced, and the developing direction of the method is proposed..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 6 (2017)
Research on Jamming Technology of Shipborne Multispectral Liquid Smoke Screen
YU Qun, and MIN Jiang
Based on the problems of shipborne smoke screen passive jamming tactics and technology, incorporated with the present situation of liquid smoke screen multi-band passive jamming technology, the water mist multi-spectral and emulsion smoke screen jamming technologies and methods are researched. According to the physicalBased on the problems of shipborne smoke screen passive jamming tactics and technology, incorporated with the present situation of liquid smoke screen multi-band passive jamming technology, the water mist multi-spectral and emulsion smoke screen jamming technologies and methods are researched. According to the physical properties and the factors affecting the stability of emulsion, the emulsion smoke screen multilayer structure jamming theory is put forward. The emulsion droplet multi-interface effect and different directional propagation characteristics are applied to the liquid smoke screen jamming. The new type of liquid smoke screen can effectively interfere in the visible, infrared and millimeter-wave wide band..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 1 (2017)
[in Chinese]
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 1 (2017)
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 1 (2017)
Ultrafast Spectroscopy for Two-dimensional Materials
LI Han, and CHENG Xiang-ai
Interaction between laser and two-dimensional materials is an international hot topic in recent years. Three common ultrafast spectroscopies, such as transient absorption, ultrafast infrared absorption and time-resolved photoluminescence spectroscopies are introduced. Principles, compositions and characteristics of theInteraction between laser and two-dimensional materials is an international hot topic in recent years. Three common ultrafast spectroscopies, such as transient absorption, ultrafast infrared absorption and time-resolved photoluminescence spectroscopies are introduced. Principles, compositions and characteristics of these three transient spectroscopies are described respectively. The development of ultrafast spectroscopies is forecasted..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 15 (2017)
Design of Imaging Spectrometer Based on AOTF
ZHU Hai-bo, and GUAN Song
Based on the theory of acousto-optic tunable filter (AOTF), the design method of the imaging spectrometer is presented and the prototype of the imaging spectrometer is produced with the band from 0.45 μm to 0.95 μm. The prototype is consisted of three parts, which are the fore-telescope system with 6×, AOTF componBased on the theory of acousto-optic tunable filter (AOTF), the design method of the imaging spectrometer is presented and the prototype of the imaging spectrometer is produced with the band from 0.45 μm to 0.95 μm. The prototype is consisted of three parts, which are the fore-telescope system with 6×, AOTF components and the imaging lens with the focus of 70 mm. The focus of the prototype system is 420 mm, which collects +1 diffraction order. The target imaging experiments are performed to provide the image and spectrum information of target sampling points such as the sky, near and far buildings, trees and windows, in which the near building and the far building have the same spectrum characteristics. Experimental results show that the prototype can provide not only the space information of the target such as size, shape and relative position, but also obtains the spectrum characteristics of a pixel of the image. The same target has the same spectrum information which is not related to the detection distance. So the kind of the targets can be recognized according to different spectrum information, which has practice value to target recognition..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 20 (2017)
Research on All-fiber Band-pass Acousto-optic Tunable Filter
XU Chun-xia, and WU Liang-ying
An all-fiber band-pass acousto-optic tunable filter is proposed. By introducing a mode converter into a cladding-etched single-mode fiber, the fundamental mode transmitted in the core originally is blocked and the cladding mode is coupled in the fiber core at the same time. The results indicate that the band-pass filteAn all-fiber band-pass acousto-optic tunable filter is proposed. By introducing a mode converter into a cladding-etched single-mode fiber, the fundamental mode transmitted in the core originally is blocked and the cladding mode is coupled in the fiber core at the same time. The results indicate that the band-pass filter has a blue shift when acoustic frequency increases, and the resonant peak of the filter decreases with the increase of cladding radius, moreover, the increase of the acoustic power can also increase the resonance peak of the filter to some extent. Meanwhile, a band pass resonance peak with 3 dB bandwidth of 2.13 nm is obtained when the cladding radius is kept at 32.5 μm, and the acoustic power and frequency are fixed at 20 mW and 1.5 MHz respectively. The tunable wavelength of 85.18 nm can be achieved when the acoustic frequency is adjusted from 1.2 MHz to 1.5 MHz. The device has the potential to be applied into the fiber lasers with large gain bandwidth..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 24 (2017)
Research on Optical Beamforming Network Technology Based on Fiber Dispersion
CHEN Er-dong, HE Wen-gan, WU Peng-sheng, and LI Lin
Optically controlled phased broadband array is a combination of microwave photonics technology and array technology, which not only retains the technical advantages of the array system, but also has the characteristics of large bandwidth, easily forming multiple beams at the same time and anti-electromagnetic interfereOptically controlled phased broadband array is a combination of microwave photonics technology and array technology, which not only retains the technical advantages of the array system, but also has the characteristics of large bandwidth, easily forming multiple beams at the same time and anti-electromagnetic interference. Broadband optical beamforming network is the core technology of optically controlled phased broadband array. The basic principles and broadband characteristics of optical beamforming network are introduced. An optical beamforming technology based on optical fiber dispersion is presented. An optical beamforming network experimental system is set up. The experimental system is tested and conclusions are drawn..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 29 (2017)
Design and Research on Inclinometer Based on Fiber Taper
YAO Ping
An inclinometer based on dual tapered fiber is introduced. Corning single-mode fiber SMF-28 is used in the inclinometer. Two fiber tapers are fabricated in the fiber. When a light beam transmits through the first taper, high-order cladding modes are partially excited from the core mode. The cladding modes and the core An inclinometer based on dual tapered fiber is introduced. Corning single-mode fiber SMF-28 is used in the inclinometer. Two fiber tapers are fabricated in the fiber. When a light beam transmits through the first taper, high-order cladding modes are partially excited from the core mode. The cladding modes and the core mode propagate along the fiber together. When the light beam transmits through the second taper, the cladding modes are coupled into the core again and interfered with the core mode. As the effective refractive indexes of the core mode and the cladding modes are different, phase differences are introduced. The interference spectral intensity shows peaks and valleys at different wavelengths. As the effective refractive index of the cladding mode changes with the various of the tilt angle, the peaks and valleys of the interference spectral intensity will also shift. As a result, the tilt angle could be computed through the shift of a peak or a valley. Experimental results show that the tilt angle can be measured effectively with the fabricated fiber inclinometer. The accuracies for two directions are 0.151 nm/° and 0.087 nm/° respectively..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 35 (2017)
Preparation of Lu2.94-xYXAl5O12:0.06Ce Phosphor in Glass by Low-temperature Co-sintering Method
WANG Zi-ming, HUANG Xiao-tong, YANG Bo-bo, LIU Yi-ming, ZOU Jun, QIAN Xing-lu, ZHANG Can-yun, SHI Ming-ming, ZHOU He-yu, LIU Zi-zhuan, and ZHENG Fei
The bismuthate glass is prepared by conventional melting-quenching method at 950 ℃, which is composed of Bi2O3, H3BO3 and ZnO. The Lu2.94-xYXAl5O12:0.06Ce phosphor in glasses (PIGs) is prepared by low-temperature co-sintering bismuthate glass frits and Lu2.94-xYXAl5G12:0.06Ce (X=0~0.8) phosphors. The luminous efficiencThe bismuthate glass is prepared by conventional melting-quenching method at 950 ℃, which is composed of Bi2O3, H3BO3 and ZnO. The Lu2.94-xYXAl5O12:0.06Ce phosphor in glasses (PIGs) is prepared by low-temperature co-sintering bismuthate glass frits and Lu2.94-xYXAl5G12:0.06Ce (X=0~0.8) phosphors. The luminous efficiency, correlated color temperature, CIE coordinates of the LED device is studied under different current by stc-4000 high accuracy array spectroradiometer and PMS-80 visible light spectroscopy analyzing system. Research results show that the luminous efficiency of the light emitting diode (LED) device decreases about 16%, significantly less variation in correlated color temperature, CIE coordinates without shift with the current gradually increasing from 10 mA to 30 mA. Being lack of red light component, the warm white-LED with high color rendering index (CRI) is constructed by coating a layer red phosphor film in spinning method on green phosphor glass in the experiment, which promotes further the application of green phosphor glass in white-LED..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 39 (2017)
Effect of Airflow on Burning Performance of Mg/Ba(NO3)2 Compositions
GUO Le-ju, CHEN Ming-hua, GE Qiang, and WANG Shao-guang
The burning spectrums of Mg/Ba(NO3)2 compositions are measured with the whole-band radiometer in a state of static and airflow in order to analyze the distribution of burning spectrums in the airflow. The burning spectrum distribution figures of pyrotechnic compositions are obtained. The main energy radiation spectrumsThe burning spectrums of Mg/Ba(NO3)2 compositions are measured with the whole-band radiometer in a state of static and airflow in order to analyze the distribution of burning spectrums in the airflow. The burning spectrum distribution figures of pyrotechnic compositions are obtained. The main energy radiation spectrums of Mg/Ba(NO3)2 compositions in a state of static and air flow are in the range of 620～760 nm, and the position of the strong radiation peak is same. The combustion time of Mg/Ba(NO3)2 compositions is 14.20 s in a state of static, the wall temperature is 1 298.23 ℃, and the combustion time is 8.63 s in a state of airflow, the wall temperature is 593.36 ℃. In a state of airflow, the Mg/Ba(NO3)2 compositions are mainly dissipated in the form of forced convective heat transfer, and heat dissipation is mainly in the form of radiation in a state of static..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 44 (2017)
Research on Preparation and Optical Properties of Cd1-xZnxS Nanorod Arrays
YANG Song, ZHANG Jun, and LIANG Li
Cd1-xZnxS nanorod arrays are synthesized by chemical vapor deposition using high purity cadmium sulfide and zinc powder as source materials. The synthesis of Cd1-xZnxS is confirmed by Raman spectrum. Scanning electron microscope and fluorescence spectroscope respectively show that the products are regular nanorod arrayCd1-xZnxS nanorod arrays are synthesized by chemical vapor deposition using high purity cadmium sulfide and zinc powder as source materials. The synthesis of Cd1-xZnxS is confirmed by Raman spectrum. Scanning electron microscope and fluorescence spectroscope respectively show that the products are regular nanorod arrays, and the Cd1-xZnxS nanorod arrays have an asymmetric broad emission peak between 480~590 nm. By Gaussian fitting, the broad emission peak is fitted to peaks of 473 nm, 522 nm, 560 nm, 595 nm and 607 nm, and the luminescence mechanisms are discussed respectively..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 48 (2017)
Research on High Precision Three-dimensional Laser Radar Based on ICCD Time Slice
LIU Jing-peng
For the disadvantages of low resolution in the laser radar imaging, the system of three-dimensional laser radar based on intensified charge coupled device (ICCD) time slice is designed. The principle of the system is analyzed. The design of the system and target three-dimensional information acquisition method are descFor the disadvantages of low resolution in the laser radar imaging, the system of three-dimensional laser radar based on intensified charge coupled device (ICCD) time slice is designed. The principle of the system is analyzed. The design of the system and target three-dimensional information acquisition method are described. Laser receiving module, laser imaging module and target information acquisition method are introduced in detail. Experimental results verify the laser radar system feasibility. The system has better resolution and application prospect..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 51 (2017)
CI-SR800 Blackbody Full-automatic Control Method Based on Digital Bridge
LI Hang-yu, and YU Hai-wei
A full automatic control method of CI-SR800 blackbody based on digital bridge is proposed to allow the blackbody to access the full-automatic test line without affecting the original using method. According to the 4 wire resistance touch screen and an internal buzzer used in CI-SR800 blackbody, the digital bridge circuA full automatic control method of CI-SR800 blackbody based on digital bridge is proposed to allow the blackbody to access the full-automatic test line without affecting the original using method. According to the 4 wire resistance touch screen and an internal buzzer used in CI-SR800 blackbody, the digital bridge circuit and the buzzer detection circuit are designed. A series of design are carried out, in consideration of the requirement of the construction operability and appearance at the same time. 4 wires of the touch screen and 2 wires of the buzzer through the IO interface reserved by the blackbody controller are led in parallel method. A control circuit for the blackbody is designed based on practical working principle of the blackbody man-machine interface. The practical applications show that the design is easy to install, maintenance free and stable in operation..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 56 (2017)
Research on Millimeter-wave Scattering Property of Plasma
ZHANG Zi-hao, GAO Peng, OUYANG Ji-ting, and ZHAO Ri-kang
The interaction between plasma and electromagnetic wave mainly lies in four aspects, the incident electromagnetic wave′s reflection, absorption, dispersion and modulation by plasma. The features of plasma and its effect on electromagnetic wave propagation are introduced. Simulation model is built based on finite differThe interaction between plasma and electromagnetic wave mainly lies in four aspects, the incident electromagnetic wave′s reflection, absorption, dispersion and modulation by plasma. The features of plasma and its effect on electromagnetic wave propagation are introduced. Simulation model is built based on finite difference time domain (FDTD) method. Adjusting characterization parameters of plasma, the effects on the scattering physical mechanism and propagation characteristics of incident microwave from symmetrical and asymmetrical plasma cylinders are simulated and analyzed. Simulation results show that frequency and collision frequency of plasma are determined by its density, while frequency and collision frequency are the main elements that influence plasma′s electromagnetic scattering characteristics..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 60 (2017)
Analysis of Optical Axis Error of Spherical Shell in Electro-optical System
LI Sen-sen, and WU Fan
Based on the plane geometry and stereo geometry theory and the light refraction law, the output laser axial deviation angle of any point light source is calculated in theory after passing through the spherical shell. Considering the electro-optical detection receiving and the firing systems with different wavelength, tBased on the plane geometry and stereo geometry theory and the light refraction law, the output laser axial deviation angle of any point light source is calculated in theory after passing through the spherical shell. Considering the electro-optical detection receiving and the firing systems with different wavelength, the error between the laser firing and the target detection is analyzed and the error change law is simulated and calculated. Calculation results show that the optical axis error must be considered when the wavelength is different between the firing and the detection systems. At the same time, the optical axis error should be compensated in the electro-optical system to achieve accurate detection and target tracking..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 67 (2017)
Research on 1.06 μm Laser Atmosphere Scattering Characteristics Based on Normal Logarithm Distribution
LIU Zong-xin, and HAO Ben-gong
To solve the problem that the Junge distribution widely used in atmosphere scattering calculation makes the estimation of aerosol particles distribution inaccurate near the ground, the normal logarithm distribution which can accurately describe the aerosol particles distribution near the ground is adopted. And a laser To solve the problem that the Junge distribution widely used in atmosphere scattering calculation makes the estimation of aerosol particles distribution inaccurate near the ground, the normal logarithm distribution which can accurately describe the aerosol particles distribution near the ground is adopted. And a laser atmosphere scattering model is established to simulate and analyze the space and time characteristics of 1.06 μm laser atmosphere scattering. Results show that the scattering intensity has a trend of sharply decreasing then slowly decreasing with the increasing of off-axis distance. The detection scattering intensity mainly comes from the position near the detection point on off-axis. The peak of the detection scattering pulse has a backward movement with the increasing of off-axis distance and pulse width increases gradually..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 71 (2017)
Three-dimensional Small Angle Measurement Based on Pyramid Prism
LI Bao-lin, and CAI Sheng
Based on optical collimation, a non-contact three-dimensional small angle measurement method is presented by using a pyramid prism as a cooperation target. A retrieving algorithm which calculates simultaneously the pitch, yaw and roll angles is proposed according to the spot centroid. Based on this, a measuring system Based on optical collimation, a non-contact three-dimensional small angle measurement method is presented by using a pyramid prism as a cooperation target. A retrieving algorithm which calculates simultaneously the pitch, yaw and roll angles is proposed according to the spot centroid. Based on this, a measuring system is designed to finish modeling and simulation experiments. Simulation experiments show that the method has the characteristics of long working distance, high accuracy and decent range, and has good application value in engineering..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 76 (2017)
A Practical Focal Plane Bad Pixels Detection Method of Infrared Thermal Imager
YANG Ping, and ZHANG Hui
Due to materials, process and use environment, bad pixels exist in the focal plane of infrared thermal imager. Firstly, according to the analysis of infrared image characteristics of bad pixels and using collected IR picture, the pixels of the focal plane are detected one by one with a 5×5 window. Secondly, the baDue to materials, process and use environment, bad pixels exist in the focal plane of infrared thermal imager. Firstly, according to the analysis of infrared image characteristics of bad pixels and using collected IR picture, the pixels of the focal plane are detected one by one with a 5×5 window. Secondly, the bad pixel detection criterion is obtained through calculating the bad pixel membership degree based on the change of gray level and direction. Finally, the validity of the method is proved by an example..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 32, Issue 6, 81 (2017)
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