Journals >Electro-Optic Technology Application
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2011
Volume: 26 Issue 6
21 Article(s)
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Research Article
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 1 (2011)
Design of Folded Miniature Digital Lens
QUE LI-zhi, SU Zhou-ping, and ZHAO Yan-li
The folded miniature digital lens with F-number of 3, field of view of 52°and total length of 6.67 mm is designed. The design result shows that the lens system has the excellent image quality. The meridional and sagittal modulation transfer function (MTF) curves at 0.73 field of view, spatial frequency of 285 lp/mThe folded miniature digital lens with F-number of 3, field of view of 52°and total length of 6.67 mm is designed. The design result shows that the lens system has the excellent image quality. The meridional and sagittal modulation transfer function (MTF) curves at 0.73 field of view, spatial frequency of 285 lp/mm are more than 0.3. The distortion is about -1.3% and the relative illumination at max field of view is about 70%. The later. al color is about 0.42 μm, which is less than the pixel size..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 1 (2011)
Design of Infrared Temperature Control System
GUAN Min-jie, and ZHAO Dong-e
Through researching the principle of the temperature measurement and control, the simple temperature control system based on the infrared temperature sensor is designed. The data acquisition card can finish the task of the data collection, the calculation and the control, so it is not necessary to design other parts. TThrough researching the principle of the temperature measurement and control, the simple temperature control system based on the infrared temperature sensor is designed. The data acquisition card can finish the task of the data collection, the calculation and the control, so it is not necessary to design other parts. The principles and design methods of the thermoelectric infrared temperature sensor, the measurement circuit, the drive protection circuit, the actuator, the heating device and the power supply are analyzed. The whole temperature mea.surement and control system is a simple structure, a low cost and easily realized. The system can measure and control the surface temperature of the objects well..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 4 (2011)
High Precision Vehicular Gyro-stabilized Tracking System
WU Zhuo-kun, SHU Xiao-fang, SUN Li-jun, and YANG Kai
The research of the high precision electro-optical tracking system based on the vehicle platform is introduced, the system structure is designed. The platform is a T-shaped structure, and the high frequency vibration is separated by the whole vibration reduction. The control system is designed, the rough stabilization The research of the high precision electro-optical tracking system based on the vehicle platform is introduced, the system structure is designed. The platform is a T-shaped structure, and the high frequency vibration is separated by the whole vibration reduction. The control system is designed, the rough stabilization is realized by the gyro-stabilization device, the fine stabilization is realized by the high frequency fast mirror, and the stabilized precision is improved by the two-level stabilization platform combing the fine and rough stabilization. The simulation experiment is made and the system test is also made by the swing device which can simulate the vehicular environment. The experimental result shows that the system can achieve the high precision..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 8 (2011)
Experimental Method and Result Analysis for Imaging Test of LCoS Light Engine
LIU Hao
Light engine is the core component of LCoS projection system. In order to master the actual work situation of LCoS light engine, and understand the influence of the image quality by practical assemble error,three-chip LCoS light engine of ColorQuadTM structure is chosen as an example, and a method for test image made bLight engine is the core component of LCoS projection system. In order to master the actual work situation of LCoS light engine, and understand the influence of the image quality by practical assemble error,three-chip LCoS light engine of ColorQuadTM structure is chosen as an example, and a method for test image made by LCoS light engine using an optical path system based on optical experimental flatform is introduced. First, the three parts of optical system (the light source module, distribution and composition of light and projec. tion imaging) are built, the result of the experiment is analyzed. Second, in order to make the system has the high quality images, the light road is adjusted and modified by analysis of specific imaging according to the work of each device. Finally, the problems such as uneven brightness distribution, low contrast ratio and double images in the test experiment are summarised and analyzed in detail..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 11 (2011)
Far-field Simulation and Analysis on Laser Irradiation of Electro-optical Detection System
ZHANG Yong-mei, and ZHANG Jian-xin
The far-field simulation model of the soft-damage under the laser irradiation is established. The far-field laser power distribution of the different ranges is simulated and the 3D curve is a steep saddle shape structure with a very high slope. The far-field soft damage of the single-element and CCD electro-optical detThe far-field simulation model of the soft-damage under the laser irradiation is established. The far-field laser power distribution of the different ranges is simulated and the 3D curve is a steep saddle shape structure with a very high slope. The far-field soft damage of the single-element and CCD electro-optical detection system are discussed and analyzed..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 14 (2011)
3D Color Gamut Measurement of LCD Monitor and Evaluation in Different Color Spaces
WANG Kai, LV Yi-jun, GAO Yu-lin, LIN Yue, DENG Hui, CHEN Guo-long, and CHEN Zhong
The color gamut determines the range of colors that the monitor displays, and the color gamut coverage rate is an important parameter in the quality evaluation of LCD monitor. As brightness is one of the three attributes of color, it should be considered when the color and color gamut are analyzed in 3D color space. ThThe color gamut determines the range of colors that the monitor displays, and the color gamut coverage rate is an important parameter in the quality evaluation of LCD monitor. As brightness is one of the three attributes of color, it should be considered when the color and color gamut are analyzed in 3D color space. The effect of the brightness of LCD backlight on color gamut coverage and color saturation is analyzed, and the effect of the color saturation on the color gamut coverage is also analyzed. 3D color gamut coverage is obtained by the different formulas in the different color spaces using MATLAB. The effect of the brightness on the color gamut area and chroma is analyzed and compared. The results show that CIEDE2000 formula is most suitable to evaluate the color of monitor among CIEDE2000 formula, CIEL*a*b*formula and CIEL*u*v*formula..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 18 (2011)
Infrared Suppression Approach Based on Heat Pipe Temperature Control Technology
YANG Hui, XIE Wei, ZHANG Shuan-qin, LING Jun, and LIAN Chang-chun
Aiming at the method for infrared suppression of the high temperature object, the heat pipe with the high thermal conductivity is studied. The technology characteristics of heat pipe are analyzed theoretically, and the thermal conductivity model of heat pipe module is established. The performance of the infrared suppreAiming at the method for infrared suppression of the high temperature object, the heat pipe with the high thermal conductivity is studied. The technology characteristics of heat pipe are analyzed theoretically, and the thermal conductivity model of heat pipe module is established. The performance of the infrared suppression of the heat pipes with different power is calculated systematically. The experimental model of the theory of the heat pipe module is established, and the infrared suppression effect of heat pipe is tested. The results show that the radiation temperature of the object is reduced from 140 ℃ to 65 ℃ when the heat pipe is used..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 22 (2011)
Hardware Realization for Algorithm of Infrared Image Edge Detection
GUO Jing, and HUANG Jia-cai
The output of the infrared imager is heteropical and dim, so the sharpening enhancement algorithm of the infrared image has the great significance. The effectiveness of the algorithm of infrared image combined the edge has been discussed in the software simulation, on that basis, the algorithm has a few improvements. TThe output of the infrared imager is heteropical and dim, so the sharpening enhancement algorithm of the infrared image has the great significance. The effectiveness of the algorithm of infrared image combined the edge has been discussed in the software simulation, on that basis, the algorithm has a few improvements. The effectiveness of the algorithm in the sharpening enhancement about the hardware real-time image is mainly discussed. The FPGA + SRAM hardware structure is designed, the realization method of the algorithm in the hardware system is discussed, the effect of the algorithm realized on the hardware platform is analyzed, and the implementation effects between the software and hardware are compared. The image contour is strengthened after the sharpening algorithm and the objective is identified easily..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 25 (2011)
Analysis of Long Pulse Laser-metal Interaction
REN Tian-Yu, WANG Yang, and XUE Yang
The effect of a variety of factors on the laser heating from the theory and numerical simulation, by using 1 064 nm Nd:YAG long pulse laser interaction with metal. The phenomenon and problem in the process of the laser-matter interaction are analyzed and simulated, as for laser-metal interaction research at home and abThe effect of a variety of factors on the laser heating from the theory and numerical simulation, by using 1 064 nm Nd:YAG long pulse laser interaction with metal. The phenomenon and problem in the process of the laser-matter interaction are analyzed and simulated, as for laser-metal interaction research at home and abroad, especially the temperature field and stress field of the long pulse laser-metal interaction are analyzed theoretically. The effect of the basic mechanism of the laser reflection, the absorption and the transformation on the target material, the temperature field, the stress field and the melting temperature of the metal material heated by the laser, the moving velocity of the solid-liquid interface, the liquid mass transfer, the material gasification and the ablation mass transfer are analyzed..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 28 (2011)
Effect of Control-light on Light Storage via SBS
SI Jun, and DING Ying-chun
The coupled wave equation in the optical fiber based on stimulated Brillouin scattering (SBS) is discretized, the light storage process via SBS is solved by MATLAB, and the effect of the temporal line profile and spectral line profile of the control-light on the light storage is studied. The read pulse and write pulse The coupled wave equation in the optical fiber based on stimulated Brillouin scattering (SBS) is discretized, the light storage process via SBS is solved by MATLAB, and the effect of the temporal line profile and spectral line profile of the control-light on the light storage is studied. The read pulse and write pulse play a different role in light storage, but the differences of these can not be found in the theory analysis. The calculations show that the differences of the temporal line profile of the control pulse do not obviously affect the stored results. The chirped Gaussian pulse and rectangular pulse can get the best storage because of their wide spectrum..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 33 (2011)
Numerical Simulation for Influence of Pulse Duration on Femtosecond Laser Ablation of Alloy
ZHU Shi-jia, WANG Xin-lin, ZHU Wei-hua, WU He, CHEN Zhi-yong, and LIU Jun
The ablation mechanism of the femtosecond laser ablating B2 type NiTi alloy is studied by the molecular dynamics simulation combined with two-temperature model. The target material thickness of 90 nm is ablated by the laser with the central wavelength of 800 nm, energy density of 29.3 mJ/cm2 and pulse durations of 50, The ablation mechanism of the femtosecond laser ablating B2 type NiTi alloy is studied by the molecular dynamics simulation combined with two-temperature model. The target material thickness of 90 nm is ablated by the laser with the central wavelength of 800 nm, energy density of 29.3 mJ/cm2 and pulse durations of 50, 200, 500 and 1000 fs. The pressure-transmitting boundary condition for the bottom of the target material is formulated, the result shows that the condition is adapted to the simulation. The temperature and internal pressure with time varying and atomic configuration in the target material show the influences of pulse durations on ablation process. The result shows that the peak temperature of electron in center irradiation zone is lower, the pulse duration is wider at the same energy density, but the peak temperature of lattice in center irradiation zone is higher, the heat affect zone is greater. The ablation is occurred when the pulse durations are 200, 500 and 1 000 fs..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 39 (2011)
Study Status of Spectral Selective Laser Stealth Materials
PAN Jia-liang, ZHANG Shuan-qin, LU Yan-li, and LING Jun
The spectral selective absorbing theory of rare earth upconversion materials, photonic crystals materials and organic materials is studied. The upconversion materials can absorb the given wave band lights by the method of upconversion theory, the photonic crystals materials can absorb the given wave band lights by the The spectral selective absorbing theory of rare earth upconversion materials, photonic crystals materials and organic materials is studied. The upconversion materials can absorb the given wave band lights by the method of upconversion theory, the photonic crystals materials can absorb the given wave band lights by the method of instructive films design and the organic materials can absorb the given wave band lights by the method of functional group vibration. The laser stealth possibility and stealthy methods of those spectral selective absorbing materials are analyzed, and the study status is also summarized. The spectral selective laser stealth materials are further researches in promoting laser absorptivity, enhancing practicability and compatibility..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 45 (2011)
Study on Energy Band and Slow Light of 2D Photonic Crystal
LI Cai-shan, and LOU Shu-qin
By comparing the energy band of 2D photonic crystal with square and triangular lattice, the 2D triangular lattice for the study is selected. The photonic band gap (PBG) can be formed by the periodicity of the permittivity in the photonic crystal, and then the movement of the photon is controlled. The single-line-defectBy comparing the energy band of 2D photonic crystal with square and triangular lattice, the 2D triangular lattice for the study is selected. The photonic band gap (PBG) can be formed by the periodicity of the permittivity in the photonic crystal, and then the movement of the photon is controlled. The single-line-defect photonic crystal waveguide is proposed, the effect of the energy band structure and dispersion relation with the line defect on the group velocity is analyzed, and the group velocity dispersion (GVD) of the effective slow-light region is at 105 ~ 106. To realize the dynamic adjustment of group velocity, the permittivity and the lattice radius are changed, the group velocity can be adjusted to below 0.1c. The simulation shows that the fundamental factors impacting the group velocity is the changed frequency of the defect band..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 49 (2011)
Deformation Analysis of Laser Cavity Mirror and Method of Heat Pipe Cooling
LIU Li, AN Chao-wei, SONG Jie-bing, and BI Xiang-li
The cavity deformation can lead to the decline in the laser output power and the beam quality deterioration when the laser operates, so the performance enhancement of the high power laser is restricted greatly. The heat deformation based on the heat absorption of the laser cavity and the lens pressure deformation basedThe cavity deformation can lead to the decline in the laser output power and the beam quality deterioration when the laser operates, so the performance enhancement of the high power laser is restricted greatly. The heat deformation based on the heat absorption of the laser cavity and the lens pressure deformation based on cooling fluid are analyzed, the method of the heat pipe cooling cavity mirror is proposed. The principle of the heat pipe cooling and the advantage of heat pipe in heat conductivity are introduced, the solution of heat pipe cooling cavity mirror is designed, which provides the effective way to effectively control the lens surface deformation of the high power laser system..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 55 (2011)
Scalar and Vector Analysis of Diffraction Wave with Different Pinhole Diameter
WANG Rui-lin, ZHANG Li-xia, and XING Ting-wen
Pinhole is a key component in phase-shifting point diffraction interferometer (PS-PDI), therefore the production precision of pinhole will seriously affect the detection accuracy of interferometer. For most of the diffraction problems, the theory of scalar diffraction is a good approximation. However, the theory of vecPinhole is a key component in phase-shifting point diffraction interferometer (PS-PDI), therefore the production precision of pinhole will seriously affect the detection accuracy of interferometer. For most of the diffraction problems, the theory of scalar diffraction is a good approximation. However, the theory of vector diffraction is more suitable to explain the actual situation of diffraction wave surface when the diffraction aperture is very small. On the basis of the scalar and vector diffraction theory, effects on the quality of diffraction wave-front produced by the size of pinhole are analyzed, in the meantime, the peak and valley (PV) value and root mean square (RMS) value of diffraction wave front errors are calculated while visible lights entranced the pinhole. The results show that with the scalar diffraction theory, when aperture is 400 nm, RMS of diffraction wave front error is the minimum and changes little with the material thickness. As well, with the vector diffraction theory, when aperture is 200 nm, RMS of diffraction wave front error is the minimum, but it changes greatly with the material thickness..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 58 (2011)
Threshold Segmentation Algorithm Based on Image Smoothing
ZHANG Jun-sheng, HOU Hui-lin, and ZHAO Xiao-xia
Threshold segmentation is widely used in the image segmentation, and the typical method is Otsu method. However, the Otsu method can not segment the low contrast or low signal to noise ratio image exactly, so a new dynamic threshold segmentation algorithm is proposed. The dynamic background image of the original image Threshold segmentation is widely used in the image segmentation, and the typical method is Otsu method. However, the Otsu method can not segment the low contrast or low signal to noise ratio image exactly, so a new dynamic threshold segmentation algorithm is proposed. The dynamic background image of the original image is obtained by the smoothing filter, the original image minus the dynamic background is the difference image, and the original image segmentation is achieved by setting the threshold. The experimental results show that the method has low algorithmic complexity, can segment successfully the objects which Otsu method can not segment and reduce the noise effectively, so it is suitable for a wide range of image segmentation..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 62 (2011)
Automatic Registration for Multi-spectral Images Based on Control Points Algorithm
HUANG Li-xian, SHEN Zhi-xue, ZHANG Da-yong, LUO Fei, and LUO Yong-quan
To process the multi-spectral images registration of the same sensors, a fast and effective automatic image registration algorithm is presented. The control points of the reference image and matching image are extracted by Forstner operator, the corresponding image points are matched by the algorithm based on the gray To process the multi-spectral images registration of the same sensors, a fast and effective automatic image registration algorithm is presented. The control points of the reference image and matching image are extracted by Forstner operator, the corresponding image points are matched by the algorithm based on the gray correlation, and then the parameter of the affine transform is calculated according to the corresponding image points. The multi-spectral images registration is achieved. The registration result of multi-spectral images of the liquid-crystal spectral camera proves that the algorithm is efficient and accurate..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 66 (2011)
Multi-object Tracking Algorithm of Particle Filter Based on Median Shift
LI Chun-xin
Aiming at the problem that the traditional particle filter is divergent and failed in tracking for multiple objects, a multi-object tracking algorithm of the particle filter based on the median shift is presented. The intermediate result after sampling can be analyzed by the method based on the median shift and the subAiming at the problem that the traditional particle filter is divergent and failed in tracking for multiple objects, a multi-object tracking algorithm of the particle filter based on the median shift is presented. The intermediate result after sampling can be analyzed by the method based on the median shift and the subset particles of the object can be obtained, therefore, each object can be estimated optimally, the filter accuracy is improved, so the problem of object entering or leaving and the occlusion can be also solved effectively. The simulation results demonstrate that the algorithm is robust and effective for multiple objects under complex backgrounds..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 70 (2011)
Tracking Method of CamShift Sequence Image Based on Incomplete Object
LI Xiao-bing, WANG Yu-mei, and ZHANG Hong-yi
The algorithm can not adjust in real time the shape of the tracking window when the incomplete object is tracked by CamShift algorithm. The background image of the incomplete area is included in the tracking window, and the ability of the object matching is reduced, so CamShift algorithm can not track the incomplete obThe algorithm can not adjust in real time the shape of the tracking window when the incomplete object is tracked by CamShift algorithm. The background image of the incomplete area is included in the tracking window, and the ability of the object matching is reduced, so CamShift algorithm can not track the incomplete object accurately. A new method of CamShift sequence measurement image is proposed, taking the similarity between the object model and the candidate model as the weight, the probability range of the kernel function is limited, the data volume of data set is reduced and the shape of the tracking window is adjusted in real time. The method can improve the matching similarity and solve the problem of stable tracking incomplete object in the theodolite measurement image. The experimental results show that the method can track steadily even when the loss of the object reaches 50%..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 75 (2011)
[in Chinese]
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 26, Issue 6, 79 (2011)
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