Chinese Version Light学术出版中心
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Issue 6 ， 1992
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Triangulation Imaging Characteristics of the System Used to Measure Volume of Coal Heap
Abstract：On the basis of optical triangulation principle,formulas for calculating height of the heap of coal are derived and imaging characteristic diagrams of the system are gaven.Finally a rule for correctly selecting focul lengthf of the objective lens and horizontal distance d between the laser beam and the camera are presented.- 28
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Published：2020-08-12 -
Ruling Error Measurement of the Diffraction Gratings
Abstract：This paper presents a new method to measure the ruling error of diffraction gratings,and indicates its application in diffraction grating testing.- 40
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Published：2020-08-12 -
A Study of New-Style Frictional Slideway with High Accuracy
Abstract：A new-style slideway with"V"type has been built in our research work,and the specimen carriage is kinematically supported on the slideway with five pads.It obeys the theory of dynamics. The structure of the slideway is simple,and the accuracy is ultra-high. The material,structure and characteristics of the slideway has been investigated.The experiments about friction,wear and lubrication of the slideway has been carried out.And the friction factors of the selected material has also been measured. Presented in this paper are structure design of the slideway, selection of material and experimental analysis about friction, wear and lubrication.- 72
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Published：2020-08-12 -
The Diamond Turning of Copper and Aluminum Alloys and the Surface Quality
Abstract：In this paper,the copper and aluminum alloys are ultrapreciscly machined by the single point diamond tool.The factors,including structure and property of the materials and the surface residual stress which affect the surface quality,such as the reflectivity,form accuracy and the surface micro-roughness,are studied.The optimization of the surface character and the processing are also discussed.- 49
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Experimental Study on the Electron-Beam-Addressed Microchannel Spacial Light Modulator
Abstract：In recent years,two dimentional spatial light modulators based on different kinds of theoryies are developed rapidly due to the development of optical information processing and the optical computing. In this paper,a demountable electron-beam-addressed microc-hannel spacial light modulator is reported.The design,principle of operation and primary experimental results are given.- 51
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Published：2020-08-12 -
Automatic Acquisition of a Moving Target in a Complex Background
Abstract：Image binarization is done by using an adaptive thresholding which is calculated using invariant moments. Based on the principle of image subtract,moving targets in the field of view are fonud.A projection algorithm and a numbering method is used for calcuting the places of the targets.The main tracked target is determined by the moving speed of the targets. All above mentioned is introduced in this paper in detail except the numbering.And the results of experiments are given.- 49
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The CAD for Meshing Harmonic Analysis of the Contrate Gear Drive
Abstract：The paper provides a meshing analysis of the contrate harmonic gear drive which can quickly select the optimum transmission scheme and determine the corresponding meshing parameters and structure parameters.After introducing this overall stucture,the paper describes the design ideas of man-machine dialogue and meshing analysis.- 44
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Correlation Characteristic of Subdivided Matched Filter
Abstract：In this paper,the correlation characteristic of subdivded matched filter is studied and its advantages are discussed.- 88
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Published：2020-08-12 -
A Method for Quickly Calculating the Centre of Gravity of a Moving Target
Abstract：This paper introduces a method using hardwares to count up the 2-D spatial distribution of measured targets in a frame of image,and using high speed signal processor TMS32010 to calcul- ate and output the place of the targets. The time of calculating the centre of gravity of the targets within whole field of view is 1.3ms. The position error≤1 pixle. It can eliminate or abate the influence caused by spiced salt noise and dynamic sluggishness. It is suitable for automatically tracking and measuring fast targets with high precision.- 39
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Published：2020-08-12 -
Microcomputer-Based Data Processing System in Automatic Point-to-Point Analyzer of Laser Speckle Pattern
Abstract：This paper introduces the principle of automatic point-to-point analyzer of laser speckle pattern,describes the method of designing hardware and software of the microcomputer-based data processing system and explains the important role of the microc-mputer in the system.- 49
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Published：2020-08-12 -
New Method of Measuring Linewidth Enhancement Factor of Semiconductor Laser
Abstract：This paper presents a method of directly measuring the linewidth en- hancement factor α.The experiment of HLP 1400 semicondctor laser is carried out and the factor is -4±1.3.- 48
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A Study of Absoulte Measurement of High-Reflectance at 10.6μm
Abstract：This paper presents a new method of absoulte measurent for infrared high-reflectance.Double beam are used and reflecting cavity of two spherical mirrors are constructed and rotated by 180?.Measuring beam is reflected light times on the surface of sample.The accuracy of measu- rement reflectance is 5?10-4and the precision better than 2?10-4.- 42
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Published：2020-08-12
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