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Issue 4 ， 1988
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Effect of Ta2O5 on the Glass Forming Region of Glass in System B2O3-La2O3-CaO
Abstract：In this paper, glass forming region in system B2O3—La2O3—CaO is described. Experimental results indicate that the glass forming region is shifted to poor-B2O3, rich-La2O3 region with increasing the component of Ta2O5,When component of Ta2O5 equals to 10 wt% the glass forming region is maximum. Crystalline temperature of glass and glass crystalline have been determined with DTA and X—ray. the results show that the position of exothermic peak and endothermic peak of main crystalline Will also be defferent.- 48
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Published：2020-08-12 -
Design of Aplanatic Lens with Two Aspheric Surfaces Used in Optical Disks
Abstract：A method and program of automatic design of lens with two aspheric surfaces are given in this paper.The highst order of the term in the equation used in the program is 10 of power. Using this program a two aspheric surface lens with focal length f'=4.5mm and numerical aperture NA=0.45 has been designed. The effect of index, working, distance and thickness of the lens on its image quality is discussed.- 43
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Published：2020-08-12 -
Effect of Temperature on P-H2 Stimulated Raman Scattering
Abstract：In this paper temperature effect on P-H2 stimulated Raman Scattering is presented. A concise relation between the population density difference and the temperature is derived. The result calculated by the relation shows that the optimum runing temperature of the p-H2 Raman laser is the liquid nitrogen(L—N2)temperature. When the working temperature is lower than the optimum one, Raman gain saturation is shown. In terms of this relatlon,the dependence of the laser optimum pass numbers in a Mulfiple-pass Cell(MPC)on the temperature is discussed. For increasing Raman gain and decreasing pass numbers, an effective way isto lower the temperature.- 55
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Published：2020-08-12 -
A New Scintillation Crystal-BaF2
Abstract：This paper introduces the scintillation properties of BaF2 crystal and the comparing results With other scintillationmaterials. And examples of application of BaF2 crystal are given.Characteristics and growth conditions of BaF2 crystal are studied from a view of crystal growth.- 43
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Published：2020-08-12 -
Development of Preparing Technique of X-ray Reflective Film for Hyperbolic and Paraboloid Mirrors by Columnar Target in Magnetical Sputter System
Abstract：Preparing technique of the inner-surface reflective film for the hyperbolic and paraboloid reflective mirrors in X-ray telescope by columnar target in magnetical sputter technology is described. The structure of such layers is fine and firm, its homogeneity being within ? 5%.- 32
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Published：2020-08-12 -
A Method of Calculating and Preparing Arbitrary Refractive Index Combined Films
Abstract：In this paper, formulae for two-layer combinative film are deduced, the program block diagram used for calculating the two -layer combinative film is given out and an easy way telling us hwo to prepare the equivalent index in exprement is introduced.- 29
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Published：2020-08-12 -
A New Design for Laser Cavity Structure with Multi-Reflector
Abstract：In this paper,a new method for designing laser cavity structure is presented. In this method parameters are separated for the calculation.The calculation procedure is simpler and range of application is wider than other methods.- 21
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Published：2020-08-12 -
A Study of the Time Broadening Effects in Time-Resolved Fluorescence Spectrum Measurement
Abstract：The So-called"Pythagorass theorem"relationship between the pulsewidths in convoluting two Gaussian pulses or a Gaussian pulse with a single exponential function has been deduced and.In accordance with the experimental data, the deconuoluting problem in time-resolved fluoressence measurement with streak camera has been analysed with the. sid of a computer.- 40
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Published：2020-08-12 -
Automatic Analysis of Spray Image
Abstract：An automatic spray image analysing system combined with a television system, a pulsed laser and, computer techniques, has been established. Using this system, an accurate and speedy analysis of a spray can be obtained no matter what kind of droplets in the spray is, spherical or non-spnerical,transparent or non-transparent. The method based on the adaptiue threshold of a gradient image segments the droplets from the background, then TV measurement and computer vision techniques are used for feature extraution. The programms developed in this system can automatically select in-focus droplets and measure their size,aspect ratio,location and velocity. The reliability of the computer programms developed in this system has been proved by computer simulation and experiments. For a digitized image with 512x512 pixels/frame, the deviation of analysls is less than 5%,the running time of the computer,whieh is IBM-AT connected with vax-11/750, is 90 seconds/frame or so.- 40
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Published：2020-08-12 -
Research for the Drift Process of the Graduation Disk in E. O. T. S. Cinetheodolite
Abstract：This paper discusses the error caused by azimuth drift of the horizontal graduation disk during the working process of E. O. T. S. Cinetheodolite using experiments and theoretical analysis, and puts forward a method for eliminating or reducing the error. This paper may provid a reference for total design of the cinetheodolite.- 32
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Published：2020-08-12 -
Control and Managemet of Tp801—A by IBM PC/XT
Abstract：This paper introduces an on-line method of connecting IBM PC/XT with single board computer TP801-A and its control and management art.- 31
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Published：2020-08-12 -
Electric Circuit for Emphasizing Details of Optical Effect in Electronic Engraving Machine
Abstract：This paper introduces a method which can increase the definition of reproductions. The effect of the imaginary light covering edition and principle of the electric circuit are indicated. The "edge adorning" electric circuit and experiment devices are given. The wavehape at different points of tke electric circuit is measured. The result shows that the blaek-white edge lines are clear and the outline is also clear and precise.- 27
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Published：2020-08-12 -
Design of the Preamplifiers of Acoustic Emission Instrumentations
Abstract：This paper describes design principles and methods of the preamplifiers of acoustic emission instrumentations. This kind of preamplifier is a low-noise, high sensitivity and wide band amplifier. The paper also points out the selection methods of circuit parameters and the test of the characteristic indexes of the preamplifier.- 41
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Published：2020-08-12
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