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Issue 11 ， 2016
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Applications and development of ultra large aperture space optical remote sensors
Abstract：For the rapid development of space remote sensing technology and the improvement of demand for space detection precision, this paper researches the more feasible and effective technological routes for ultra large aperture optical remote sensors. Several kinds of optical remote sensors that have been launched or planed are included, such as monolithic aperture imaging system, deployable segmented imaging system, interferometric synthetic aperture imaging system and diffractive imaging system. The research pr Keywords：ultra large aperture space optical remote sensor;monolithic aperture imaging system;deployable segmented imaging system;interferometric synthetic aperture imaging system;diffractive imaging system;review- 327
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Published：2020-07-07 -
BRDF measurement of matte coating and its application
Abstract：To explore the scattering characteristics of the stray light on hood surface of a camera, the Bidirectional Reflectance Distribution Function(BRDF) of the matte coating(Z306) on a aluminium plate specimen was measured and modeled to suppress the stray light. The BRDF value of the specimen coated with matte coating Z306 at 0.65 μm was obtained. On the basis of the scattering characteristics of the specimen coated with matte coating Z306, the microfacet-based model suitable for roughness matte coating was sel Keywords：space camera;matte coating;Bidirectional Reflectance Distribution Function(BRDF);optical system;stray light;modeling;error analysis- 104
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- 13
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- 4
Published：2020-07-07 -
Sub-nanometer precision optical fabrication of CaF2 materials
Abstract：When CaF2 materials are used in projection lenses, the performance of the projection lenses can be improved greatly. This paper researches the process of CaF2 crystal fabrication to realize its high precision optical fabrication in all wave bands. Firstly, the pitch lap and the diamond powder were used to get a relative better figure and surface quality of a CaF2 element. Then, the technological parameters of the polishing lap, such as rotation speed, movement range and pressure were optimized, and the coll Keywords：CaF2;projection lens;precision optical fabrication;sub-nanometer precision fabrication;Ion Beam Figuring(IBF)- 74
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- 27
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- 2
Published：2020-07-07 -
Design of sub-imaging system based on monocentric multiscale dual resolution imaging
Abstract：A new monocentric multiscale imaging system with a wide field of view and dual resolution was proposed based on the theories of monocentric multiscale imaging and foveated imaging to achieve the high resolution dynamic gazing of the interesting region in a wide-area. The working model of this system was described in detail. By using a single lens and a doublet as the initial structure, two axis MEMS(Micro-Electronic-Mechanical System) micro mirrors were combined to form a light path. On the basis of the ZEM Keywords：monocentric multiscale imaging system;foveated imaging;dual resolution imaging;MEMS micro mirror;high resolution dynamic gazing;wide field of view- 81
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- 4
Published：2020-07-07 -
Calibration for coaxiality of optical axis and vertical rotary shaft in femtosecond laser tracker
Abstract：As the geometric errors of shafts in a femtosecond laser tracker directly lead to pointing error and limits the coordinate measuring accuracy of the instrument, this paper researches the effects of geometric errors between optical axis and vertical rotary shaft in the laser tracker on measuring accuracy of the instrument. It proposes a calibration method for the coaxiality of optical axis and vertical rotary shaft to reduce the tracking measuring errors from the misalignment between optical axis and vertica Keywords：femtosecond laser tracker;coaxiality;rotation imaging;dual wedge;calibration- 77
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- 15
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- 2
Published：2020-07-07 -
Swept source laser based on acousto-optic tuning
Abstract：A swept-source laser by using an Acousto-optic Tunable Filter(AOTF) was researched to improve the stability of the source output. The principles and method to implement output stability of the source were described, and corresponding parameters of the source were analyzed. An acousto-optic tuning was selected to replace the mechanical filtering to improve its output stability. A Semiconductor Optical Amplifier(SOA) was used as a gain medium and the AOTF was used as a wavelength-selected element in an intern Keywords：swept-source;Acousto-optic Tunable Filter(AOTF);Semiconductor Optical Amplifier(SOA);non-mechanical movement;stable output- 77
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- 15
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- 3
Published：2020-07-07
Modern Applied Optics
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Effect of soil particle size on fluorescence characteristics of anthracene and its correction
Abstract：To detect the polycyclic aromatic hydrocarbons(PAHs) in soils accurately, the typical PAH pollutants of anthracene in soils was used as research targets, and the effect of soil particle size on the fluorescence characteristics was researched. Then, a correction method was established to reduce the influence of soil particle size on the standard curve of PAH. The fluorescence characteristics of anthracene in soils were studied and three fluorescence peaks were shown at 421 nm, 442 nm and 470 nm. Seven soil s Keywords：polycyclic aromatic hydrocarbons;soil;particle size;anthracene;two-dimensional(2D)correlation fluorescence spectroscopy;correction method- 107
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- 14
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- 10
Published：2020-07-07 -
Measurement of dynamic shaft power based on industrial photography
Abstract：On the basis of the industrial photography, a non-contact measurement method for dynamic shaft power of a transmission shaft was proposed. Firstly, a measurement system of shaft power was designed, and the measurement method of shaft rotational speed and shaft torque was put forward. Then the shaft rotational speed and torque were measured by digital image correlation method and sub pixel computation. Finally, the shaft power was figured out. To validate the accuracy of this measurement method, a test syste Keywords：digital image correlation;shaft power measurement;rotational speed measurement;torque measurement;gradient method;industrial photography- 61
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- 13
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Published：2020-07-07 -
Design of ultra-short embedded baffle
Abstract：An ultra-short embedded baffle was put forward to reduce the size of an aerial satellite and to control its attitude meanwhile maintaining the result of stray light suppressing. The basic structure of the ultra-short embedded baffle was introduce, and its optimized design method was given. The shape of the baffle was redesigned, and an ultra-short multilayer shading tube was designed to replace the quite long baffle designed by existing methods. The installation mode between the baffle and the main structur Keywords：space remote sensor;baffle;ultra-short embedded structure;Point Source Transmission(PST);stray light- 85
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- 16
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- 2
Published：2020-07-07 -
Line laser visual servo control system for seam tracking
Abstract：A real-time seam tracking system consisting of a three-axis cartesian robot, a line laser sensor, and an industrial computer was designed and its measuring principle, feature point measuring method and adaptive fuzzy control were researched. The Guassian Kernelized Correlation Filter(KCF) was adopted to detect the weld feature points in real time in welding process and 3D coordinate values of industrial camera were obtained by 2D pixel coordinate values based on measuring principle. A adaptive fuzzy control Keywords：line laser sensor;seam tracking;adaptive fuzzy control;weld feature point;Guassian kernelized correlation filter- 116
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- 17
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Published：2020-07-07 -
Calibration of dynamic precision for measurement platform of photoelectric encoder
Abstract：The dynamic measurement platforms for photoelectric encoders are characterized by higher resolution, higher accuracy, and higher rotation speeds, and traditional measurement methods are difficult to calibrate its dynamic measurement accuracy. So, this paper proposes a calibration method for the measurement platforms. The working principle of the platforms was analyzed, and some factors effecting the measuring accuracy of the platforms was pointed out. The main characteristics of dynamic errors were research Keywords：dynamic platform;photoelectric encoder;error measurement;dynamic error calibration- 66
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- 13
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- 9
Published：2020-07-07
Modern Apploed Optics
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Isothermally hot-embossing methodology for flattening of plastic microreactor
Abstract：An isothermally hot-embossing methodology was proposed for the flattening of plastic microreactors. The flattening principles of a plane plastic microreactor by the isothermally hot-embossing methodology were researched and an elastic-plastic model was established to describe the deformation process. The influences of temperature and pressure on the topography of plastic microparts were quantitatively analyzed. By considering the flattening effect and microstructure of the plastic microreactor, the effect o Keywords：isothermally hot-embossing;micro injection molding;plastic microreactor;flatness- 56
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- 13
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Published：2020-07-07 -
Modeling and experiment of precision rotary positioner with large stroke driven by non-resonant piezoelectric motor
Abstract：A precision rotary positioner with a large stroke driven by the non-resonant piezoelectric motor was proposed to solve the problem of short stoke, complicated structure and control of the precision positioner in optical waveguide packaging. The precision rotary positioner could meet the needs of large stroke and high precision by two driving modes of continuous actuating and stepping actuating. Firstly, the dynamic model of the rotary positioner was established and the kinematics formula of system was prese Keywords：rotary positioner with large stroke;non-resonant piezoelectric motor;precision positioning;waveguide packging- 54
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- 12
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- 3
Published：2020-07-07 -
On line measurement of position for large primary mirror
Abstract：When the primary mirror position of a telescope is adjusted, its position should be measured in real time. This paper proposes an on line measuring system for the primary mirror position based on position sensors. By taking the deformation of a mirror cell into account, a algorithm to solve the primary mirror position was obtained by using the space analytic geometry method. A 1.23 m SiC mirror in our lab was used to complete the online measuring experiment for the primary mirror position. The measuring dat Keywords：telescope;primary mirror;position resolving algorithm;position of primary mirror;on line measurement- 69
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- 16
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- 3
Published：2020-07-07 -
Micro acceleration switch with tooth-shaped structure for long pulse sensitivity
Abstract：A micro acceleration switch for long pulse sensitivity was proposed to meet the requirement of a power management system of intelligent weapons for switch latching/unlatching. The switch was designed by using a suspended mass with tooth-shaped structure and a tooth shape guide and the energy dissipation was realized by the mutual collision of the mass and tooth shape guide during the moving process. The switch could implement the unlatch under the high amplitude and narrow pulse width acceleration and the l Keywords：Micro Electro-mechanical System(MEMS);acceleration switch;long pulse sensitive switch;dynamic response;tooth structure- 109
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- 12
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Published：2020-07-07 -
Precision diffusion bonding of iron-aluminum impedance match target
Abstract：To obtain the state equations of some materials at a high pressure, an iron-aluminum impedance match target for the experimental researches on the state equation of laser driving was prepared and the bonding technology of iron and aluminum films was studied. Both the cold rolled iron film and ultra-precision matching aluminum film were used as raw materials in this work, and the dependences of sample topography, thickness, crystallization properties and interfacial characteristics on process conditions were Keywords：iron;aluminum;iron-aluminum film;impedance match target;diffusion bonding- 69
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- 18
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Published：2020-07-07 -
Development of spherical capacitive electrodes of MEMS silicon hemispherical gyros
Abstract：Due to the spherical shape, the spherical electrode has different etching depths in ICP(Inductively Coupled Plasma) etching, and the resonator following the stopping layer is often damaged in the thin place of the electrode before the ICP etching front reaches the stopping layer in the thick place of the electrode. Therefore, this paper proposes a novel method to fabricate 3D silicon spherical electrodes. On the basis of the inhenrent lag effect of ICP etching, a V-shaped mask with an open window width grad Keywords：Micro-electro-mechanical System(MEMS);hemispherical gyro;spherical electrode;Inductively Coupled Plasma(ICP)etching- 69
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- 19
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- 3
Published：2020-07-07 -
Design and experiment of piezoelectric electromagnetic hybrid broadband generator with magnetic force tuning
Abstract：This paper focuses on environmental vibration energy harvesting generator to provide low energy for a micro low-power system. A piezoelectric electromagnetic hybrid broadband power generator was developed based on nonlinear magnetic force tuning. The working principle of the power generator was introduced, and its output power characteristics by the piezoelectric system and electromagnetic system were respectively simulated with the software of ANSYS and Ansoft Maxwell. Then, an experiment system was set up Keywords：piezoelectric generation;electromagnetic generation;broadband generator;magnetic force tuning;micro power;finite element analysis- 77
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- 13
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- 4
Published：2020-07-07 -
Performance of stator iron core for amorphous three-phase induction motor
Abstract：By taking common three-phase asynchronous motors for objective, a motor model was established, and the stator iron cores of the asynchronous motor was prepared by the Fe-based amorphous alloy and silicon steel, respectively. The performance and characteristics of stator iron cores made of Fe-based amorphous alloy and silicon steel were researched. Then, the alternating current losses and coercive forces of two kinds of iron cores were also tested by a soft magnetic testing system. Test results show that the Keywords：three-phase induction motor;amorphous core;silicon steel core;finite element analysis;iron loss;coercive force- 103
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- 23
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- 1
Published：2020-07-07 -
Second super-harmonic resonance response of cantilever beam with bolt joint under low pretension
Abstract：To obtain the effect of bolt-joint in a theodolite on the dynamic response of system, the nonlinear property caused by assemble connection was researched. A single bolt connection cantilever model was used to analyze the change of structure vibration characteristics from the bolt-joint. Then, the finite element method was employed in the simulation analysis in time domain for the nonlinear vibration characteristics of cantilever model connected by the bolt joint under low pretension, and the phase diagrams Keywords：photoelectric theodolite;bolt joint;contilever beam;structure vibration;nonlinear vibration;harmonic resonance- 127
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- 17
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Published：2020-07-07 -
Design of double-sided fast steering mirror based on piezoelectric actuating
Abstract：According to the requirements of laser radars for beam wavefront, a piezo-activated double-sided and fast-steering mirror was designed to realize the high-accuracy beam pointing and wide scanning range of a coherent laser remote system. The mechanical structure of the system and its electronics control method were researched. In consideration of the system requirements for the point angle, clear aperture and the signal bandwidth, an actuator and a displacement amplification mechanism were chosen. To overcom Keywords：coherent detection;laser radar;piezo-actuating;fast steering mirror;analog PID- 64
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- 14
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- 4
Published：2020-07-07
Micro/Nano Technology and Fine Mechanics
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Influence of bias magnetic field on detection voltage of magnetostrictive liquid level sensor
Abstract：To improve the detection accuracy of a magnetostrictive liquid level sensor, different placements of float magnets in the bias magnetic fields of the sensor and its impact on the detection voltage were researched. The bias magnetic fields generated by float magnets in different placements were analyzed by the finite element analysis of ANSYS software. It was found that when three pieces of magnets under NNS placement or one single ring magnet are chosen as bias magnetic field, the detection voltage waveform Keywords：bias magnetic field;magnetostrictive liquid level sensor;detection voltage;finite element method- 78
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- 17
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- 2
Published：2020-07-07 -
General modeling and optimal design of flexure supporting structure for optical components
Abstract：A mechanical and a parameter optimization model for flexure support structure of optical components were proposed to allow the flexure structure meet simultaneously the requirements of the stiffness for optical component position and the compliance for temperature adaptability。Meanwhile, the corresponding modeling method was investigated. As this flexure structure was consisted of several identical flexure parts, it was simplified into an indeterminate beam structure, and the radical stiffness and tangentia Keywords：optical component;flexure mounting structure;general model;indetermination;strain energy;optimization design- 79
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- 19
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- 3
Published：2020-07-07
Micro nano technology and precision machinery
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Embedded algorithm for relative pose measurement between non-cooperative targets
Abstract：For the spacecrafts with circle and line features, an algorithm for embedded vision applications was proposed for the relative pose measurement between non-cooperative targets. The edge points were detected by a Canny edge detector and the image thinning was performed in a Field Programming Gate Array(FPGA). Then, elliptic characters on the target were detected by a novel ellipse detection algorithm based on edge contour in a Digital Signal Processor(DSP), and line features on the target were detected by a Keywords：computer vision;non-cooperative target;pose measurement;ellipse detection;hough transform- 69
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- 17
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Published：2020-07-07 -
Soft sensing of particle size distribution in dynamic light scattering measurement
Abstract：As the traditional inversion algorithms for particle size distribution measurement by dynamic light scattering show complex computation, lower accuracy and poorer anti-noise capacity, this paper proposes a soft sensing method for particle size distribution based on improved Bagging algorithm by using idea big data. The data of autocorrelation function and particle sizing distribution were obtained by changing the parameters of particle distribution shape. Then the learning machines were trained by the data. Keywords：dynamic light scattering;particle size distribution measurement;soft sensing;Bagging algorithm- 46
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- 16
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- 3
Published：2020-07-07 -
Structured measurement matrix by particle swarm optimization for remote sensing compressive imaging
Abstract：For non-ideal image construction performance of a block circulant matrix in remote sensing compressive imaging, this paper introduces the particle swarm optimization intelligent algorithm into optimizing the block circulant matrix, meanwhile maintaining the matrix structure. Firstly, the Welch bound of a correlation coefficient is taken as a threshold value to restrain the off-diagonal entries of the Gram matrix and to build a target matrix. Then, the objective function is established by making the Gram mat Keywords：remote sensing image;compressive imaging;image reconstruction;block circulant matrix;particle swarm optimization- 54
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- 12
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Published：2020-07-07 -
Registration of infrared image and visible image based on saliency and EOH feature analysis
Abstract：To realize the information fusion of infrared and visible images and make up the deficiency of the single modality image, a new algorithm based on saliency and Edge Orientation Histogram(EOH) features was proposed. Firstly, the saliency analysis was used to find the important information of the visible image and to obtain the saliency map. By fusing it with the visible image, the important information in the visible image was divided. Then, adaptive Features from Accelerated Segment Test(FAST) algorithm was Keywords：image fusion;infrared image;visible image;saliency analysis;adaptive Features from Accelerated Segment Test(FAST);Edge Orientation Histogram(EOH);feature point descriptor- 92
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Published：2020-07-07 -
Real-time non-uniformity correction of infrared imaging system
Abstract：A real-time Non-Uniformity Correction(NUC) algorithm for a single-frame infrared image was proposed based on multi-thread optimization to correct the strip-type Fixed Pattern Noise(FPN) generated by non-uniformity response from an infrared camera. Firstly, the plus-relationship of the output value and the noise was determined by NUC algorithm based on total variation theory and a mathematical model was established to describe the strip noise. The image was split into a high-frequency component and a low-fre Keywords：infrared image;imaging system;strip-type noise;non-uniformity correction;real-time processing- 84
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- 20
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- 5
Published：2020-07-07 -
Improved rattle snake dual mode cell model for image fusion
Abstract：Since the target in a pseudo color fusion image based on the classical Waxman fusion model is not clear,this paper proposes an improved receptive field fusion model. The infrared image and visible light image were respectively ON against enhanced and OFF against enhanced. The infrared ON against enhanced image was fed into an center exciting area of the center-surround receptive field model and the visible light OFF against enhanced image was fed into a surround inhibition zone to get the fusion image B com Keywords：image fusion;receptive field fusion model;infrared image;visible image;center-surrounded by domain;dual mode cell- 82
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Published：2020-07-07 -
Micro gas leakage detection based on tensor low rank decomposition and sparse representation from infrared images
Abstract：To detect the micro gas leakage in petrochemical production, a single-frame small target detection method was proposed by using infrared images. The low-rank sparse decomposition theory and sparse representation theory were researched and an innovative method to detect a micro-target was proposed based on tensor low-rank decomposition and sparse representation. The tensor decomposition form was employed in exploiting the information contained in background matrices, The priori knowledge was used to construc Keywords：computer vision;infrared detection;leakage detection;tensor low-rank decomposition;sparse representation;infrared imaging- 72
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- 16
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Published：2020-07-07 -
Orthorectification of optical aerial images by GPU acceleration
Abstract：An optical aerial image orthorectification parallel algorithm by Graphic Processing Unit(GPU) acceleration was presented to improve the image real-time processing ability and the serial orthorectification efficiency for massive image data on a CPU. The principle of optical image orthorectification algorithm was introduced, and the parallel processing of orthorectification algorithm was described. To reduce the computational load of GPU execution, the concept of "effective pixel region" was introduced and an Keywords：orthorectification;Graphic Processing Unit(GPU);parallel algorithm;effective pixel region- 82
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Published：2020-07-07 -
Improvement of feature point annotation for three-dimensional spine model based on curvature multiple feature fusion
Abstract：Because the precise coordinate description and accurate matching of physiology of the lumber spine have not yet reached the accuracy requirement of the medicine, this paper researches how to describe the physical coordinates of lumber spine feature points precisely. The definition and traditional annotation method of human spine sample features were introduce. Then, an improved method to adaptively annotate the feature points was proposed based on curvature multiple feature fusing to solve the problem of we Keywords：spine;3D model;feature point annotation;curvature multiple feature fusion;maximum value of the curvature- 207
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- 12
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Published：2020-07-07 -
Improvement of localization accuracy of spot centroid based on sequential images
Abstract：To meet the requirements of a laser firing simulation system for high speed and high accurate location of laser spot centroids, a novel method based on the video sequential images is proposed for the spot detection and spot centroid location. The method firstly detects the firing events by the subtraction image between every two sequential frames and by the estimated noise parameters. Then, it uses the noise estimation to determine the segmenting threshold of the spot and combines morphologic filtering tech Keywords：spot detection;centroid localization;mass of gravity;sequential image;laser firing simulation- 73
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- 19
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Published：2020-07-07
Information science
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