Chinese Version Light学术出版中心
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Issue 10 ， 2018
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Developement of rapid rotary polarization imaging detection devices
Abstract：To obtain a faster rate of polarization imaging detection, this study has improved the existing mechanical rotary polarization imaging device and designed a continuously rotating polarizer imaging device. Image processing flow and polarization imaging speed were also improved. This device overcomes the shortcomings of traditional mechanical rotating polarization imaging with a large volume and slow imaging speed. The system uses a motor to control the polarizer to rotate quickly and smoothly, the camera to Keywords：polarization imaging;polarization state;rapid polarized light detection;image processing- 152
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- 26
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Published：2020-07-05 -
Development of swept source based on dual filtering
Abstract：Swept source is a key component of optical coherence tomography; its spectral bandwidth and instantaneous linewidth directly affect the axial resolution and imaging depth of the imaging system. In a single filter, the two parameters are mutually exclusive. Here, a swept source system with two filters combined for optimization was proposed. Two semiconductor optical amplifiers in parallel were used as the gain medium. An acousto-optic tunable filter (AOTF) and a Fiber Fabry-Perot Tunable Filter (FFP-TF) were Keywords：swept source;acousto-optic tunable filter;Fabry-Perot tunable filter;spectral bandwidth;instantaneous linewidth;synchronization and matching- 109
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Published：2020-07-05 -
Hyper-spectral imaging sensor in UV-VIS-NIR region in air for coastal ocean observation
Abstract：A novel ultraviolet-visible-near infrared imaging spectral system in air has been demonstrated to provide an effective instrument to measure the environment and pollution of the ocean along the coastal area. Based on the characteristics of the targets, different parameters of the performance of the system have been proposed. The Dyson imaging spectrometer was chosen to satisfy the requirements of the signal-to-noise ratio and the high optical performance. The Dyson spectrometer has not been widely applied i Keywords：imaging spectrometer;coastal ocean;Dyson system;broadband- 78
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Published：2020-07-05 -
Effect of extinction ratio and detector noise on polarization accuracy of nanometer wire grid polarization imaging system
Abstract：In remote sensing imaging, extinction ratio and detector noise are important parameters that determine the accuracy of polarization imaging of nanowire gratings. To strike a balance between the two parameters for system optimization, a mathematical model using the two parameters and polarization noise was established in this paper. The photoelectron number received by large pixels was used as a measure to quantify the relationship between detector noise and system polarization noise. The effect of the two p Keywords：polarization imaging;polarization error;nano-wire filter;extinction ratio- 117
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Published：2020-07-05 -
One-step ultrasonic method to investigate characteristics of metal-packaged FBG sensors
Abstract：A one-step ultrasonic welding approach for metal-packaged fiber Bragg grating (FBG) sensors was proposed to solve the problem of aging and creep in the field of traditional adhesive packaging. FBGs with and without polyimide coatings were bonded to the surface of an aluminum alloy substrate via one-step ultrasonic welding. The spectrum and thermal and mechanical properties of the bonded FBGs were studied. Additionally, the cross sections of the FBG sensors were analyzed by a Scanning Electron Microscope (SE Keywords：Fiber Bragg Grating(FBG);polyimide;one-step ultrasonic welding;strain transfer efficiency;temperature response- 99
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- 17
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- 3
Published：2020-07-05 -
Applications of glow discharge cleaning in synchrotron radiation beamlines
Abstract：Carbon contamination in a synchrotron radiation (SR) beamline is a significant factor affecting the transmission efficiency in the beamline, particularly in a soft X-ray beamline. Currently, the main solution to carbon contamination is to clean or replace the contaminated optical components. A large number of experimental studies have shown that the formation of carbon contamination is related to the presence of a small amount of oil on the chamber wall. Therefore, the purpose of this study was to clean the Keywords：synchrotron radiation beamline;carbon contamination;mass spectrometry;glow discharge cleaning- 72
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- 12
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- 1
Published：2020-07-05 -
Design and fabrication of EUV broadband multilayer mirrors with discrete thicknesses
Abstract：Efficient broadband reflective Extreme Ultraviolet (EUV) multilayers require superior control and precision of layer thickness. A solely time-controlled deposition system can not meet the requirements of high accuracy. In this paper, we present a scheme for the design of broadband multilayers with discrete thicknesses based on an evolutionary algorithm. This method greatly improves the reflectivity curve compared to that of conventional multilayer mirrors without discrete thicknesses. To verify the superior Keywords：multilayer design;extreme ultraviolet;discrete design;broadband multilayer- 98
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Published：2020-07-05 -
Ultra-precision optical manufacture and laser performance of Yb:LuScO3 crystal
Abstract：Yb:LuScO3 crystal is a new type of gain medium used in solid-state lasers. The surface profile and surface quality of the Yb:LuScO3 crystal affect the characteristics of the output laser beam significantly. Therefore, it is extremely important to explore the processing parameters for its ultraprecision optical manufacture. In this paper, a systematic study of the processing parameters for the optical manufacture of Yb:LuScO3 crystal was reported. To solve issues related to the brittleness of the Yb:LuScO3 c Keywords：optical manufacture;Yb:LuScO3;surface profile;surface roughness;copper resin pad- 93
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- 16
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- 1
Published：2020-07-05 -
Evaluation of uncertainty in multilateration with laser tracker
Abstract：Multilateration with laser tracker is an important method for on-site traceability in large-scale equipment manufacturing processes. An accurate evaluation of uncertainty is the key to ensuring quantitative accuracy in manufacturing processes. In this paper, we reported an accurate and fast technique for the evaluation of uncertainty in multilateration with laser tracker. First, the sources of uncertainty in multilateration were analyzed; these primarily include instrument errors, environmental conditions, Keywords：laser tracker;multilateration;uncertainty;multivariate measurement models- 113
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- 21
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- 10
Published：2020-07-05
Modern Applied Optics
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Tension analysis and measurement of precision cable drive
Abstract：The precision cable drive is a flexible frictional transmission method in which power is transmitted from drive capstans to a driven pulley by a properly preloaded transmission medium. Owing to its many advantages, such as lightweight, high efficiency, and simplicity, it has been widely used in the field of lightweight electro-optical tracking. Cable tension is an important design parameter that can effectively regulate the transmission characteristics of the precision cable drive. However, accurate measure Keywords：precision cable drive;transmission characteristic;measurement methods;bending rigidity- 92
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- 14
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- 2
Published：2020-07-05 -
Estimation of pose errors with non-parametric constraint of manipulator in entire workspace domain
Abstract：The methods for obtaining the solutions to kinematics error with nonparametric constraint and dynamic estimation were proposed herein to estimate the position and orientation of a manipulator in the entire workspace domain. The pose error model of dynamic nonparameterized constraint of manipulator was constructed based on the equivalent differential transformation of the link system, which in turn was based on the error equivalent differential variable and multi-joint motion. This study presented a dynamic Keywords：pose error estimation;manipulator calibration;non-parametric constraint;entire workspace domain- 355
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Published：2020-07-05 -
Estimation of uncertainty in measuring the workpiece circularity error
Abstract：In order to realize the uncertainty evaluation of the workpiece circularity error, the sampling strategy, error evaluation method, and uncertainty of the circular outline of the workpiece were investigated based on the Coordinate Measuring Machine (CMM). First, to achieve many samples from different workpieces, circular outlines were measured. Next, the sample circularity errors were evaluated according to the Differential Evolution (DE) algorithm. Then, by comparing the errors, the adopted sampling strategies and the DE algorithm were explained. Finally, based on the results of the circularity error, the uncertainty was evaluated by applying the GUM and MCM methods. The maximum average difference is 1.1μm, and the average standard uncertainty of the MCM method is 0.02 μm less than the GUM method. More stable, reliable, and accurate results can be obtained using reasonable sampling points, DE algorithm, and MCM evaluation method.Keywords：circularity error;uncertainty evaluation;sample strategy;differential evolution;MCM- 100
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- 14
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- 7
Published：2020-07-05 -
Influence of variable section throttle on performance of aerostatic bearings
Abstract：To analyze the effect of a variable section throttle on the performance of aerostatic bearings, an aerostatic bearing model with a variable section throttle was proposed. Furthermore, the dynamic change in the shape of the throttle cavity cross section was realized by deformation of the elastic plate of the bearing surface. First, the coupled partial differential equations of solid plate deformation and gas lubrication were established. Then, they were discretized and solved by the high-precision finite dif Keywords：aerostatic bearing;orifice;bearing characteristcs;aero-structure interaction;stiffness- 119
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- 13
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- 6
Published：2020-07-05 -
High-precision position control of a gene sequencer motion stage
Abstract：To realize high precision position control of a gene sequencer motion stage, a gene sequencer motion stage control system was developed, and its applied methods such as mathematical modeling, model identification, controller design, and input shaping were investigated. First, based on the dynamic equation of the motion stage and the voltage-force relationship of a permanent magnet linear synchronous motor, a model of the motion stage was established. Then the method of frequency domain scan was adopted to d Keywords：gene sequencer motion stage;permanent magnet linear synchronous motor;frequency domain scan;input shaping;repeated positioning accuracy- 119
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- 17
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- 2
Published：2020-07-05 -
Loss calculation and thermal-structural coupling analysis of a single gimbal magnetically suspended control moment gyroscope
Abstract：To investigate the temperature rise caused by loss of the magnetically suspended control moment gyroscope for the spacecraft application, it is necessary to analyze and calculate the loss and temperature distribution. In this paper, theoretical loss models that consider the iron and copper losses were established. The losses in a single gimbal magnetically suspended control moment gyroscope (SGMSCMG), which consists of a frame torque motor, radial magnetic bearing, axial magnetic bearing, high-speed motor o Keywords：magnetically suspended;control moment gyroscope;loss calculation;thermal field analysis;finite element analysis- 134
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- 14
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- 5
Published：2020-07-05 -
Effects of thermal history on reflector formation in an optical glass centrifugal casting process
Abstract：This study investigates the influence of thermal history (molding temperature and cooling rate) on the mirror forming process for spin-cast aspheric mirrors. Abaqus finite element analysis software using different molding temperature and cooling rate of simulation analysis to determine the Spin-cast temperature is 950℃ and the cooling rate of mirror is 1℃/s which can be completed in the mold filling and mirror forming. The spin-cast experiment was executed, and the forming results were measured. When the cooling rate is more than 1℃/s, the mirror is fragmented owing to the excessive local residual stress after cooling. Additionally, the axial height of the mirror edge differs from the theoretical value by 10.12 mm, and there is a large surface figure error. This surface figure error is attributable to the volume change on cooling.Keywords：spin-cast;reflector;simulation analysis;Abaqus- 90
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- 10
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- 1
Published：2020-07-05 -
Asymmetric hysteresis modeling and internal model control of piezoceramic actuators
Abstract：Piezoceramic actuators are widely used in precision positioning and control; however, their asymmetric hysteretic characteristics severely affect the position and control accuracy of a system. To address this problem, a modeling method was proposed based on the generalized Bouc-Wen model, and the system parameters of the model were identified using the differential evolution method. Based on the generalized Bouc-Wen model, a hysteretic compensation control strategy with an analytical form was developed and Keywords：piezoelectric actuator;hysteresis;asymmetric Bouc-Wen model;internal model control- 121
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- 18
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- 7
Published：2020-07-05 -
Viscous damper for use in large optomechanical structures
Abstract：Considering large optomechanical structures, a fluid damper was designed with high damping and low axial stiffness in the full frequency range to reduce the width of frequency noise. Firstly, the theory of parameter design for a liquid damper was reviewed. Secondly, the characteristics of the fluid damper were verified using the finite element method, in addition to its influence on the entire structure. The simulation results indicated that the use of a liquid damper could effectively increase the structur Keywords：micro-vibration;Line of Sight(LOS);liquid dampers;finite element analysis- 82
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- 16
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- 0
Published：2020-07-05 -
Robotic assembly technology for satellite components based on visual and force information
Abstract：For the assembly requirements of special satellite components, robot assembly technology based on visual guidance and force feedback control was studied. This technology gives the robot flexibility under different working conditions and offers high application efficiency under variable satellite assembly conditions. A robot assembly scheme that combines visual and force information was presented. Auxiliary pins were installed in mounting holes, a component was guided to the taper area of the pin by the robo Keywords：visual guide;force feedback control;pose transformation;satellite component assembly;robot- 88
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- 22
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- 5
Published：2020-07-05 -
Factors affecting the machining precision of a micro-lens array on a spherical surface in slow tool servo machining
Abstract：Ultra-precision slow tool servo (STS) machining can directly generate high-precision continuous and discontinuous freeform surfaces. However, in the fabrication of a micro-lens array (MLA) by STS, a single lens achieves different levels of quality. In addition, the low quality of a single lens may induce the failure of the entire functional component. To study the factors affecting the machining precision of an MLA on a spherical surface in STS, an experimental investigation was conducted. Specifically, the Keywords：Micro-Lens Array (MLA);Slow Tool Servo (STS);surface roughness;form accuracy- 77
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- 3
Published：2020-07-05 -
Design and functional analysis of a micro-Newton force generator
Abstract：A two-stage lever-type micro-force generator was designed to address the challenges in the calibration system of force sensor to provide accurate micro loads. Initially, the working principle of the micro-force generator was introduced based on the performance comparison among general flexure hinges. Next, the force and energy transmissions were analyzed and a theoretical calculation method to evaluate the minification ratio K was deduced by taking into consideration the deformation of the lever and the off Keywords：micro-Newton force;flexible hinge;two-stage lever-type micro-force generator;finite element analysis;optimization design- 92
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- 13
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Published：2020-07-05
Micro/Nano Technology and Fine Mechanics
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Hand-eye calibration method without a calibration reference based on second-order cone programming
Abstract：In order to overcome the restrictions of traditional hand-eye methods for determining hand-eye correspondence and robot-world orientation with a calibration reference, an improved hand-eye calibration approach without a calibration reference is proposed based on second-order cone programming. A relevant experimental system is established for its validation. First, a structure-from-motion approach is used to recover the camera motion matrix up to scaling. Then, the rotation and translation matrix in the cali Keywords：robot;calibration reference;hand-eye calibration;second-order cone programming;structure-from-motion- 83
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- 2
Published：2020-07-05 -
Design and realization of an auto-control system for the closed-loop operation of a strontium atomic clock
Abstract：An auto-control system was designed and realized for the closed-loop operation of a strontium atomic clock. This closed-loop operation locked an ultra-stable laser to a frequency obtained by averaging two peaks of the spin-polarized spectrum of the hyperfine energy structure of an isotope of 87Sr. Firstly, the requirements for automatic control of the closed-loop operation of the 87Sr atomic clock were specified, including the controlling signals and their time sequences during laser cooling and trapping of Keywords：strontium optical clock;closed-loop auto-control system;frequency instability;virtual instrument- 115
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Published：2020-07-05 -
Geometric distortion correction for structured-light image of deep-hole inner-surface
Abstract：In the detection process for the inner-surface of deep-hole parts, the correction of image geometric distortion caused by the characteristics of a curved plane has proven to be difficult. In this study, a geometric correction algorithm for structured light stripe imaging was proposed. Firstly, the deep-hole inner-surface model (DIM) obtained via undifferentiated modeling was established. Then, the geometric position correspondence relationship between the DIM and the deep-hole inner-surface plane model was Keywords：structured-light;deep-hole inner-surface;image geometric distortion correction- 106
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Published：2020-07-05 -
Fast recurrence algorithm for computing sub-Image energy using normalized cross correlation
Abstract：Scene matching requires higher matching speed and memory usage. In order to improve the running speed of the normalized cross correlation algorithm and reduce its memory occupancy rate, this paper focus on researching the steps of fast calculating sub-image's energy. After detailed analysis, the integral graph method has the advantages of flexible and rapid, but the defect is that it needs to spend a lot of memory at the same time, while it is not suitable for the embedded system. Therefore, a fast recurren Keywords：Normalize Cross Correlation(NCC);sub-image's energy;classic integral image method;fast Recurrence method- 111
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- 3
Published：2020-07-05 -
Uniform distributed subpixel ORB feature extraction method for high-precision SLAM
Abstract：In visual SLAM problems, the ORB feature has drawn much attention because of its high efficiency and stability. To address problems such as the low accuracy of image point measurements and the obvious phenomenon of feature aggregation during ORB feature extraction, a uniform distributed subpixel ORB feature extraction method suitable for high-precision SLAM was proposed. In this study, the principle of precise feature positioning was first analyzed, the error equation was then reasonably simplified, and a w Keywords：Simultaneous Localization and Mapping (SLAM);Oriented FAST and Rotated BRIEF (ORB) feature;measurement accuracy;precise feature positioning;quadtree;uniform distributing- 107
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- 20
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- 4
Published：2020-07-05 -
Action recognition using geometric features and recurrent temporal attention network
Abstract：To improve the accuracy of action recognition based on the human skeleton, an action recognition method based on geometric features and a recurrent temporal attention network was proposed. First, a vectorized form of the rotation matrix was defined to describe the relative geometric relationship between body parts. The vectorized form was fused with joint coordinates and joint distances to represent a skeleton in a video. A temporal attention method was then introduced. By considering the weighted average o Keywords：action recognition;relative geometry of body parts;temporal attention modal;LSTM neural network- 120
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Published：2020-07-05 -
Light source reconstruction method in fluorescence molecular tomography based on Laplacian manifold regularization and sparse reconstruction by separable approximation
Abstract：To enhance reconstruction performance in fluorescence molecular tomography, a joint-norm and a Laplacian manifold regularization model that combined both sparsity and spatial aggregation information was utilized for light source reconstruction. In this report, sparse reconstruction by separable approximation (SpaRSA) was developed to investigate the joint model (SpaRSA-resolved Laplacian manifold regularization model, SpaRSALM). To improve the convergence speed of the SpaRSALM algorithm, a warm-start strate Keywords：laplacian manifold regularization;warm-started strategy;sparse reconstruction by separable approximation- 99
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- 90
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- 2
Published：2020-07-05 -
Design of driving system for AUV low-light level camera
Abstract：A design method for a low-light level camera driving system based on an autonomous underwater vehicle was proposed. First, the noises of an electron multiplying charge-coupled device camera was analyzed, and the principle and method of designing conventional driving circuits was proposed taking into consideration the relationship between dark current noise and clock-induced charge noise. Next, the issue of power consumption in totem-pole circuits applied to electron multiplying drivers was discussed, and a Keywords：EMCCD;low-light level camera;CCD driver;Autonomous Underwater Vehicle(AUV);Field Programmable Gate Array(FPGA)- 125
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Published：2020-07-05
Information Sciences
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