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激光器     
相关语句
  laser
    Iodine Saturated Absorption Stabilized He-Ne Laser
    碘饱和吸收稳定的氦氖激光器
短句来源
    Methane Saturated Absorption Stabilized He—Ne Laser
    甲烷饱和吸收稳定的氦氖激光器
短句来源
    Repetition Rate Nd : YAG Laser
    重复频率Nd:YAG激光器的研究
短句来源
    A Simple Scheme of Output-line Selection of CO_2 Laser
    选择CO_2激光器输出谱线的一个简单方案
短句来源
    Study of Adjusting Method on Double 45°LiNbO_3 Q Switch Laser
    双45°LN调Q激光器调试方法探讨
短句来源
更多       
  lasers
    International Comparison of the Methane and Iodine Stabilized .Lasers Between NIM and BIPM
    甲烷稳定和碘稳定激光器的国际比对
短句来源
    A Novel Method for the Frequency-locking of 780nm Semiconductor Lasers
    一种锁定半导体激光器频率的新方法
短句来源
    Diffraction Coupled High Power Nd:YAG Lasers
    衍射损耗耦合型高功率Nd∶YAG激光器
短句来源
    Thermal Distortion of ZnSe Output Coupler with HR Coatings in mp power Transverse mow CO_2 Lasers
    高功率横流CO_2激光器高反膜耦合窗口ZnSe热形变理论和实验研究
短句来源
    Frequency difference of the two lasers is determined from the measured beat frequencies averaged over components“d”to“j”.
    根据分量“d”至“j”平均的测量拍频,确定出两台激光器的频差。
短句来源
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  laser diode
    Study on Alignment Device with Light Source of Laser Diode
    以半导体激光器为光源的准直研究
短句来源
    A developed hygrometer based on near-infrared diode laser absorption spectroscopy was reported, which includes an industrial computer, an 1. 31 μm diode laser, diode laser controllers, a data collector and analysis unit, and a long-path absorption cell.
    文章报道了基于近红外二极管激光吸收光谱技术的水汽含量分析仪的研制,系统由嵌入式工控机、 1.31μm二极管激光器、激光控制器、数据采集分析系统和长程吸收池几个单元组成。
    The operation of a high efficient, TEM00 mode, CW-Nd: YAG laser endpumped by a laser diode is rePOrted in this paper. The maximum output of 0. 65 W withslope efficiency of 51 st and optical efficiency of 40. 6 % is obtained, coupling optics andconfiguration of diode end-pumped laser are described.
    报道了用激光二极管端面泵浦的高效连续波TEM00模Nd:YAG激光器,最大输出为0.65W,斜效率51%,光-光效率最高达40.6%,并给出了耦合光学系统和二极管泵浦Nd:YAG激光器的器件结构.
短句来源
    Another interferometer with He Ne laser is used to measure the optical path difference of the optical fiber interferometer. The coherence length of the pulsed multimode laser diode is studied. In the experiments,800 mm is measured by 100 mm lead rail with the accuracy of 2 μm.
    介绍了一种用于大尺寸,无长导轨干涉测量系统.该系统由两种干涉仪构成.半导体激光光纤干涉仪用于定位,He-Ne激光干涉仪用于测量光程差.文中还就提高定位精度,采用脉冲电流调制方法调制半导激光器作了介绍.实验中,采用100mm导轨,测量距离为800mm,测量误差为±2μm.
短句来源
    A TEM_(00) Mode High Efficient CW-Nd: YAG Laser End-Pumped by Laser Diode
    二极管泵浦的高效连续波基横模Nd:YAG激光器
短句来源
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  laser instrument
    The basic principle about excimer laser instrument and ophthalmology application
    准分子激光器的基本原理与眼科应用
短句来源
    Aiming at the shortcomings of the laser range finder at present, this thesis puts forward a kind of new thought, applying digital signal processing technology to the continuous type laser range finder. The detail way is to utilize DDS technology produce sine signal to modulate laser instrument and to utilize FFT technology and digital correlation technology detect the phase.
    针对目前激光测距仪的缺点,本论文提出一种新的思想,将数字信号处理技术应用到连续式激光测距仪中,具体是利用DDN(直接数字频率合成)技术产生用于调制激光器的正弦信号,利用FFT(快速傅立叶变换)技术和数字互相关技术进行相位检测。
短句来源

 

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      laser
    Two compounds were designed, synthesized, and characterized by 1H-nuclear magnetic resonance (1H-NMR), ultraviolet (UV)-visible, and matrix-assisted laser desorption/ionization (MALDI) mass spectra.
          
    Restriction Enzyme Pattern Analysis of Mycobacteria DNA by Capillary Electrophoresis with Laser-Induced Fluorescence Detection
          
    A new method for rapidly detecting restriction enzyme patterns of Mycobacterium DNA using capillary electrophoresis with laser-induced fluorescence detection (CE-LIFD) was developed.
          
    The polymers were characterized by IR spectra, thermal-weight analysis, scanning electron microscope and laser particle size analysis.
          
    Photoinduced intramolecular electron transfer process from C60 moiety to carbazole moiety has been studied by nanosecond laser flash photolysis.
          
    更多          
      lasers
    In this review article, the development of the double cladding optical fiber for high power fiber lasers is reviewed.
          
    The main technology for high power fiber lasers, including laser diode beam shaping, fiber laser pumping techniques, and amplification systems, are discussed in detail.
          
    Finally, the applications of fiber lasers in industry are also reviewed.
          
    The sources of monochromatic radiation were heliumneon lasers.
          
    An experimental study of gasdynamic windows for gas lasers
          
    更多          
      laser diode
    The main technology for high power fiber lasers, including laser diode beam shaping, fiber laser pumping techniques, and amplification systems, are discussed in detail.
          
    Lasing in Cr:ZnSe single crystals is implemented with an efficiency of 31% and an output power of 186 mW using laser diode pumping at a wavelength of 1.77 μm.
          
    It is concluded that NYF:Er3+ crystals are promising as active media for tunable lasers with laser diode pumping.
          
    Indium arsenide/gallium arsenide structures with vertically coupled quantum dots imbedded in the active zone of a laser diode are investigated by deep-level transient spectroscopy (DLTS), and the capacitance-voltage characteristics are analyzed.
          
    A room-temperature injection laser diode with a BeZnSe/ZnSe superlattice waveguide is described.
          
    更多          
      laser instrument
    In group 2 (n=25), the same treatment protocol was given, but the laser instrument was switched off during applications.
          
    Fibre-optic laser instrument for measuring ciliary activity of oviductsin vitro
          
    Automatic measurement of emitting profile of diffusing tip on a medical laser instrument
          
    In group 2 (n?=?32), the same treatment protocol was given, but the laser instrument was switched off during applications.
          
    This theory is going to be tested with the same laser instrument in the next study.
          
    更多          


    This paper describes an automatic step and repeat reduction camera with precision positioning by applying the theory of light interference, using a He-Ne gas laser for light source. The camera consists of a laser interferometer system, a set of precision mechanism, a numerical control device and a laser frequency stabilizer. The displacement of the working table is measured and located by the laser interferomenter system, so the accuracy of the camera in repeat positioning is better than micron. In this paper,...

    This paper describes an automatic step and repeat reduction camera with precision positioning by applying the theory of light interference, using a He-Ne gas laser for light source. The camera consists of a laser interferometer system, a set of precision mechanism, a numerical control device and a laser frequency stabilizer. The displacement of the working table is measured and located by the laser interferomenter system, so the accuracy of the camera in repeat positioning is better than micron. In this paper, the properties in the design of the laser interferometer system and the problems concerned with application of laser to precision positioning of the working table in the camera are given with some emphasis. At the sametime, it affords major technical parameters and experimental data. At the end of this paper, the analysis of accuracy and the result of calibration of the cameras show that actual accuracy of the cameras is up to about e0.75 micron. Cameras of this type are now used in industrial practice.

    本文介绍一种用氦氖气体激光器作光源,以光干涉原理定位的自动分步重复照相 机。该机主要由激光干涉系统、精密机械系统、电子控制机和激光频率稳定器组成。由 于采用激光干涉定位系统直接测量工作台位移,保证重复定位精度高于±1微米。 文中着重介绍激光干涉系统结构设计特点及激光用于精密定位时的有关问题.同时 提供了主要技术参数和实验资料。对整机的精度分析和检定结果说明,产品实际精度可 达到±0,75微米。此种分步相机现已用于工业生产。

    This paper describes an application of image holographic method to the photoelastic stress analysis. The results of experimental and theoretical study indicate that the unpolarized light from He-Ne laser is equivalent to circular polarized light. Using this method, isopachic fractional fringe orders can be measured with compensator, and the parallax and drift of fringe pattern can be eliminated. The image of inter-fero-stress Pattern will appear on holographic plate when illuminated by white light. The photographic...

    This paper describes an application of image holographic method to the photoelastic stress analysis. The results of experimental and theoretical study indicate that the unpolarized light from He-Ne laser is equivalent to circular polarized light. Using this method, isopachic fractional fringe orders can be measured with compensator, and the parallax and drift of fringe pattern can be eliminated. The image of inter-fero-stress Pattern will appear on holographic plate when illuminated by white light. The photographic images of the stress distributions obtained by this method from models of turbine blade roots and a cover of bearing are presented.

    本文介绍了图像全息法在光弹性应力分析中的应用。实验和理论研究的结果都说明由氦 氖气体激光器发出的非偏振光是和圆偏振光等效的。用这个方法,可以通过补偿器测定等和 线分数条纹,可以消除条纹图案的视差和浮动,全息底板可以用白光照明再现干涉应力图 像。本文给出了用实验方法测定的汽轮机叶片根部和轴承瓦盖模型的应力分布。

    In high-speed interference photography, the characteristics of the He-Ne laser output and input current is adopted to transform a CW He-Ne laser into a controllable pulse source.The problem of synchronization for high-speed camera,pulsed CO_2 laser and He-Ne pulse source is solved successfully in the studying of the interaction of laser with matter.

    在高速干涉摄影及阴影摄影诊断系统的研制中,需要一个可控光源。本文利用He-Ne激光输出与输入电流的特性,把作为干涉光源的普通连续He-Ne激光器,改装成为可控的脉冲光源。并成功地解决了高速摄影机、CO_2脉冲激光器、平晶错位干涉仪的He-Ne光源同步问题。在脉冲激光与物质相互作用的诊断测量实践中,拍摄了清晰的照片,效果良好。这一成果扩大了He-Ne激光作为光源的应用范围。

     
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