Chinese Version Light学术出版中心
Latest Issue
Issue 2 ， 1996
-
A New Opportunity at X-Ray Optics:Bragg-Fresnel Multilayer Elements
Abstract：This puper discribes the so-called Bragg-Fresnel structure which combines the Braggreflection of multilayer with Fresnel diffraction of zone plate. In soft X-ray wavelengthregion such structures have both high reflectance and spatial resolution, it might beemployed, therefore, as imaging and/or dispersing elements in optical systems. Themethods of design and manufacture are briefly introduced with an essential research project.Keywords：Multilayer;etching;Bragg reflection on the multilayer;Fresnel diffracting effect- 36
- |
- 7
- |
- 1
Published：2020-08-12 -
Development and Applications or New Micro-motion Actuators
Abstract：The characters of several new types of micro-motion actuators is analyzed and theirapplications in some advanced fields, such as MEMS and Nanotechnology is introduced inthis paper.Keywords：Actuators;Development;Applications- 24
- |
- 4
- |
- 6
Published：2020-08-12 -
Laser Spectroscopic Property Research on Ultraviolet Ce3+: LuLiF4 Crystal
Abstract：Ce3+: LuLiF4 is shown to have a broad gain spectrum, which is attractive for shortpulse applications. Large small-signal gain over 6 dB/cm was observed for 10-nsec probepulses under KrF-excimer laser pumping. In a con focal 4-pass configuration, 20-dB gain wasdemonstrated for CW laser light.Keywords：Ultraviolet;Small signal gain;Gain spectrum width- 64
- |
- 6
- |
- 0
Published：2020-08-12 -
Soft X-Ray Multilayers at Wavelengths below 10nm
Abstract：This paper introduces the soft X-ray multilayers at wavelengths below 10um andsummaries some rules of selecting the multilayer meterials. We design the Ru/B4C、Rh/B4C and Mo/B4C multilayers for sum wavelength at normal incidence, and give the idealreflectivities of 38%~50%. The effect of thickness control error as well surface-interfaceroughness is also discussed. These will be use fill in next research of fabrication procedure.Keywords：Soft X-ray;Multilayer mirrors;Normal incidence;Multilayer design and simulation- 27
- |
- 6
- |
- 2
Published：2020-08-12 -
Construction and Accuracy Analysis of a CNC Dividing Head
Abstract：This paper presents a high-accuracy CNC dividing head developed by, authors and somekey technologies improving the construction accuracy. An effective method was found toimprove the assembly accuracy of the spindle unit through the accuracy analysis and calculation.Keywords：CNC dividing head;Rotary inductive synchronous transducer;error distribution;Error compensation assembly method- 19
- |
- 4
- |
- 0
Published：2020-08-12 -
Calculation or Close Double Row Orifice Rectangulsr Aerostatic Slideways
Abstract：In this paper, using common proportion relationship in practice engineering, highpressure areas pressure is analyzed with Finite Element Methed. A conclusion that the highpressure areas coefficient within the orifice restricting is a constant is reached, thus make theway smooth for calculating the common structure form aerostatic slideways.Keywords：Aerostaties slideways;High pressure areas coefficient;FEM(Finite ElementMethed)- 43
- |
- 9
- |
- 2
Published：2020-08-12 -
Simulation or Piezoelectric Micromotor in Kinematics
Abstract：Based on the fundamental mechanism of piezoelectric micromotor in kinematics, asoftware to analyze the piezoelcctric micromotor has been worked out. According to the Simulation of piezoelectric micromotor, some important conclusions have been reached.Finally the conclusions have been tested and verified by the experiment of piezoclectricmicromotor model.Keywords：MEMS;Piezoelectric micromotor;Kinematics;Simulation- 31
- |
- 5
- |
- 0
Published：2020-08-12 -
Equivalent Circuit's Characteristics of a Micro Traveling Wave Piezoelectric Motor
Abstract：This paper analyses the principle of a micro traveling wave piezoelectric motor, studiesthe principle from electrical energy to mechanical energy in PZT depending on the particleskinematics, and establishes the equivalent circuit of this motor. The method will supply thebasic principle for the research of the torque, power and efficiency of this motor.Keywords：Equivalent circuit;Micro traveling wave piezoelectric motor;Micro electro mechanical system(MEMS)- 99
- |
- 6
- |
- 0
Published：2020-08-12 -
Research into an Optical and Mechanical System of the Instrument for Measuring Dynamics of Micromechanism
Abstract：It is important to measure dynamics of micromechanism in its research work. In this paper,the work principle and key technique of the instrument for measuring dynamics of micromechnism are presented and the mesurement accuracy is analysed.Keywords：Micromechanism;Dynamics- 35
- |
- 4
- |
- 5
Published：2020-08-12 -
Automatic Recognition of Dynamic Multitarget and Adaptive Multi-window Tracking
Abstract：In accordance with environmental complexity of war threatres and exitence of dynamicsmultitarget,this paper makes research on the method of dynamic multitarget recognition ofTV tracking systems,moreover analyzes problems of adaptive multi-window tracking and selective target tracking. These analogue experiments show that the research is feasible.Keywords：TV tracking systems;Automatic target recognition;Adaptive window;Multitarget tracking;Algorithm- 39
- |
- 5
- |
- 1
Published：2020-08-12 -
Design and Application of a Kind or Discrete Variable Structure Controllers with Quasi-sliding Mode Bas6.d on input-output Models
Abstract：In this paper, we propose and discuss a new kind of discrete variable structure controllers. The design of this kind of controllers is based on input-output models. Satisfactoryresults are obtained in its application to a fully digital PWM DC servo system.Keywords：Discrete controlled objective;Input-output Models;Discrete variable structure control;Quasi-sliding mode- 20
- |
- 4
- |
- 2
Published：2020-08-12 -
Analysis of a New Positioning Way in Space
Abstract：In this papers,the fundamental theory of this system is generally compared with otherpositioning systems; the main components and the operation method of this system are discribed. Finally the short-term applied plan and long-term considerations on this system are proposed.Keywords：positioning;Laser scanning system;Pulse periode;Receiving system- 41
- |
- 5
- |
- 0
Published：2020-08-12 -
Development of Vertical Axial Sytem for Large Tracking and Pointing Mount
Abstract：The development process of vertical axial system for large tracking and pointing mountare presented detailed in the paper. The design of axial system and large key parts is analyzedby determined or undetermined.Keywords：Tracking and pointing system;Axial system- 31
- |
- 5
- |
- 9
Published：2020-08-12 -
Study and Application or High-efriciency 389.5MHz Acousto-optic Modulator
Abstract：This paper introduces to substitute ZnO film with LiNbO3 crystal,which is for the.firsttime in China. The high-efficiency 389.5MHz pulse acousto-optic modulator was made andapplied for the cavity dumping technology of sync-pumped dye laser. The ZnO's diffractionefficiency is only 3%. The LiNbO3's diffraction efficiency is over 14%. Dumping ratio is 50%.Keywords：Acousto-optic modulator;Dye laser;Cavity dumping;diffraction efficiency- 25
- |
- 7
- |
- 2
Published：2020-08-12 -
A Special Driving Method of The High Speed Area CCD
Abstract：This paper puts forward a special driving method of the high speed area CCD. When being' read out,the pixels of CCD are droven in different speed. A part of the pixels read outslowly. This method reduces the technique target of processing circuits. It is useful.Keywords：Charge Coupled Devices;Pixel;Readout rates;Drive- 31
- |
- 6
- |
- 0
Published：2020-08-12 -
A New Structure or Grating Micro-Measuring linear Encoder
Abstract：A new structure of grating micro-measuring linear encoder is described in this paper. Itsmeasuring length is 0.0-20.0mm. By means of two linear mobile bearing orbits,the apparatus is fashionable as well as compact in structure the measuring accuracy is up to ± 1.0μm.Keywords：Metrology grating technique;Micro-measuring linear encoler;Linear mobilebearing orbit- 41
- |
- 5
- |
- 0
Published：2020-08-12 -
Design of CCD Timing Signal Generator
Abstract：In this paper,a design method of a simple,relable,flexible CCD timing generator is presented, and sampled with linear-array CCD device TCD102D produced by TOSHIBA,JAPAN.Keywords：CCD timing;Signal generator- 28
- |
- 4
- |
- 1
Published：2020-08-12 -
Analysis of Effect on Uniformity of Photoresist Layer in Spin Coating
Abstract：The different effect factors and controlling method is analysed and listed in this paperfrom the aspects of thin coating and thick coating,It has a certain reference meaning for actual lithographic technology.Keywords：Spin coating;Uniformity- 42
- |
- 5
- |
- 0
Published：2020-08-12 -
Research on Techniques of Alignment and Measurement about Infrared Interferometer
Abstract：This paper does some researches on the self-developed phase-shifting CO2 infrared interferometer from the aspect of interferometry,and provides a technique which is used to aligninfrared interferometer precisely. Measurements of infrared components and systems are taken on this infrared interferometer. Finally,the system error of the infrared interferometer ismeasured and analysed,which is better than A/20(λ=10.6μm)as shown in results.Keywords：infrared interferometer;Phase-shifting interferometry- 35
- |
- 5
- |
- 2
Published：2020-08-12 -
Study on Dynamic Measuring Instrument for Checking Lead Errors of Ball Screws And the System Errors Correction
Abstract：It is important that the errors correction technique is adopted in the precision engineernig for high measuring accuracy. An instrument which is controled by computer to measure lead errors of ball screws is presented. The principle of the instrument and the system structure and the computer interface and the analysis of the instrument error are studied.Keywords：Errors correction;dynamic measurement;Lead error- 37
- |
- 4
- |
- 0
Published：2020-08-12 -
Discussion on Homogeneity Error-calibrating of Metrelogy Gratings
Abstract：A method on uniting calibration of homogeneity error of metrology gratings is describedin this paper,by means of the contrast coefficient of Moire fringe,the percent expression ofhomogeneity error is trans fored into displacement value expression. Finally,some factors ofaffecting homogeneeity error are discussed.Keywords：Metrology gratings;Homogeneity error;Contrast of Moire fringe- 60
- |
- 6
- |
- 1
Published：2020-08-12
Loading...
0