全光纤声光调制径向跳动差分测量技术研究

为了实现机床在加工状态下主轴径向跳动非接触、高精度的测量，采用光外差法光路的激光多普勒差分检测方法，进行了理论分析和实验验证。直接耦合和透镜耦合的全光纤光路的应用，降低了布喇格衍射光路的调节难度，提高了测量分辨率和抗干扰能力，减小了噪声；光纤分光器实现了同一轴线上的差分测量，抑制了因测量光路本身的振动带来的干扰。得到了相对误差为0.0838%的主轴径向跳动测量结果，实现了纳米级跳动误差测量。结果表明，系统的相对误差和测量不确定度均小于0.1%。该研究对主轴径向跳动的实时测量有一定的指导意义。     

一种大尺度二维直线度精密测量的新方法

本文提出了一种远距离、大范围二维直线度测量的新方法．该方法采用特殊设计的十字线准直激光器及线阵CCD，通过特殊的光学系统结构设计，能在0-20m距离内连续测量，直线度范围可达70mm，精度优于0．1mm，实际测量结果表明，该方法可适应野外作业环境。     

脉冲式半导体激光器准直光学系统的设计

根据具体的探测环境和探测精度,通过理论分析,提出了脉冲式半导体激光器准直光束的单透镜设计方法和柱面透镜的设计方法,并且给出了具体的设计参数。可以获得高斯光束的准直发散角为1.48mrad;高斯光束的腰粗为0.325mm。     

华光1型J6光学经纬仪特殊光路故障的处理

该文介绍华光1型J6光学经纬仪特殊光路故障产生的原因及排除方法。     

侧面泵浦Nd∶YAG连续激光器

介绍了一种二极管侧面泵浦的Nd∶YAG连续激光器,采用了简单、实用的侧面泵浦结构,获得37.9W的连续1.064nm的激光输出,斜效率为31.5%,光效率为23.7%.     

Experimental Research on Erbium-doped Superfluorescent Fiber Source

The effects of the variations in fiber length, fiber mirror reflectance on efficiency and output power are experimentally investigated for erbium-doped double pass backward superfluorescent fiber sources (SFSs). The influence of fiber length on mean wavelength stability (MWS) has also been demonstrated. By incorporating a short section of un-pumped erbium-doped fiber (EDF) at the output port, the pump power dependent on MWS becomes independent of pumped EDF length. This is a novel phenomenon that hasn‘t been reported up to now,and should be helpful to SFS fabrication and theory analysis. By using a fiber Michelson interferometer as spectrum slicing component,a multi-wavelength fiber source (MWFS) with ～20 channels (from 1542nm to 1559nm) is got. The MWFS has a channel spacing of ～0. 8 nm which satisfies ITUstandard. The intensity fluctuation among channels is less than 0.5dB,and the extinction ratio of all channels is above 14dB. This kind of MWFS should be useful to wavelength division multiplexing systems.     

激光技术与应用

2004030182半导体激光器=半导体レ-ザ[日]/玉贯岳正//オプトロニクス.-2003,22(12).-203～209 2004030183Pllin型激光式前置准直器=レ-ザ式プ-リアライメント器“プラライン”[日]/八木聪//计测技术.-2003,31(10).-54～552004030184Fujinon激光干涉仪=フジノンレ-ザ干涉计[日]/天野高宏//光アライアンス.-2003,14(3).-41～452004030185装有可视激光器的工作台=可视光レ-ザ搭载ト-タルステ-シヨン[日]/木幸治//光アライアンス.-2003,14(7).-28～322004030186激光CVD修复SL465E的开发=レ-ザCVDリペア-SL465Eの开发[日]/古泉真一//光…     

Measurement System of Uniformity between Breech Horizontal Platform and Datum Tube Axis of Rocket Artillery

The purpose of this development is to detect the parallelism between the breech horizontal platform and the datum tube axis of the rocket artillery. The located aiming mechanism at the muzzle and located adjustment mechanism at the breech are designed in the system. Besides those, the system also uses an autocollimator with accuracy of 1″ and a collimating mirror together to determine the axis of the datum tube. An electronic level with accuracy of 2″ is employed to measure and display the value of the included angle and the parameter of the inclined direction. The entire accuracy of this system is σ≤± 9.1″. This paper describes the composition and the operating principle of the system and analyzes the accuracy. The development of this system supplies reliable measurement method for new rocket artilleries and artilleries, and this technology is of a good application prospect.     

基于图像处理的炮管轴线直线度检测方法

在分析国内外直线度检测现状和比较了直线度测量的激光准直法、圆度法、杠杆法优缺点的基础上,提出了一种基于图像处理的炮管轴线直线度检测激光反射法.该方法通过激光器发出激光,经准直后射向分光镜,部分反射后射向测量元件.测量元件在炮管内移动并感知炮管实际轴线位置的变化.激光经反射后透射过分光镜到光靶上,CCD摄像机摄得光靶上被测信息的图像.经过图像处理及数据处理得出对应被测截面图像中的激光束中心,按照角度积累的公式计算出轴线直线度误差.同时论述了在Win98和VC++6.0环境下软件实现的步骤.实验结果表明该方法具有灵敏度高、测量速度快,对被测对象尺寸要求较低,适合在工厂内使用等优点.