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激光束宽
相关语句
  laser beamwidth
     Adaptive measuring algorithm of laser beam width based on CCD
     基于CCD的激光束宽自适应测量算法
短句来源
     scanning speed 25mm/s, laser beam width 4mm. The hard particle phases CrB, Cr_(23)C_6 in the microsturcture of laser remelting coating lead to the strenthening of the matrix.
     在本试验条件下合适的工艺参数是:激光功率2.5kW、扫描速度25mm/s,激光束宽度4mm,激光重熔层的显微组织中的CrB、Cr_(22)C_6等微粒硬质相的存在使镶嵌WC的基体组织得到强化。
短句来源
     A method of measuring the laser beam width ,divergence angle and transmisseion factoris derived from A.
     根据A.E.Seigmoan教授的空间频率光强偶极矩理论,提出测量激光束宽度、束散角及光束传输因子的方法。
短句来源
     To obtain the correct beam width value,CCD noise,lowest and higher-order Gaussian laser beam are simulated. According to ISO 11146 standard,laser beam width is calculated in second-order moment arithmetic.
     为了获取激光束的准确束宽值,模拟了基模和高阶模的高斯光束以及CCD噪声,并根据国际标准ISO 11146规定的二阶矩算法计算激光束宽
短句来源
  laser beam width
     Adaptive measuring algorithm of laser beam width based on CCD
     基于CCD的激光束宽自适应测量算法
短句来源
     scanning speed 25mm/s, laser beam width 4mm. The hard particle phases CrB, Cr_(23)C_6 in the microsturcture of laser remelting coating lead to the strenthening of the matrix.
     在本试验条件下合适的工艺参数是:激光功率2.5kW、扫描速度25mm/s,激光束宽度4mm,激光重熔层的显微组织中的CrB、Cr_(22)C_6等微粒硬质相的存在使镶嵌WC的基体组织得到强化。
短句来源
     A method of measuring the laser beam width ,divergence angle and transmisseion factoris derived from A.
     根据A.E.Seigmoan教授的空间频率光强偶极矩理论,提出测量激光束宽度、束散角及光束传输因子的方法。
短句来源
     To obtain the correct beam width value,CCD noise,lowest and higher-order Gaussian laser beam are simulated. According to ISO 11146 standard,laser beam width is calculated in second-order moment arithmetic.
     为了获取激光束的准确束宽值,模拟了基模和高阶模的高斯光束以及CCD噪声,并根据国际标准ISO 11146规定的二阶矩算法计算激光束宽
短句来源
  “激光束宽”译为未确定词的双语例句
     The effect of pulse duration and laser beam dimension on the pressure signal is discussed.
     讨论了激光脉冲持续时间,激光束宽度对压力信号的影响.
短句来源
     In the paraxial approximation, a potential well also exists for laser spot size.
     在傍轴近似下 ,激光束宽依然有“势阱”方程 .
短句来源
     HOR effect decreases the amplitude of laser spot size oscillation, whereas accelerates its rate.
     当激光强度较大时 ,高阶相对论效应变得重要 :它一方面减小激光束宽的振荡幅度 ,另一方面又加快激光束宽的振荡速度 .
短句来源
     The condition of balance-solution of the beam spot size is also given.
     同时 ,给出了考虑高阶相对论效应后激光束宽平衡解的存在条件 .
短句来源
     Finally,the experiment to measure the M~2 factor of the semiconductor laser beam with CCD camera system is performanced. The adaptive algotithm is used to define the integral area and calculate the beam width. Based on the result,the M~2 factor of the laser beam is obtained by curve fitting.
     利用实际CCD采集系统进行了半导体激光器的M2因子测量实验,利用该自适应方法确定积分范围,计算激光束宽,并进行曲线拟合求得激光束的M2因子。
短句来源
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  laser beamwidth
The International Organization for Standardization has been preparing test methods for laser beamwidth and propagation factors.
      
  laser beam width
We found that (a0)th is critically dependent on the laser beam width w0.
      
Laser beam width, divergence and beam propagation factor - an international standardization approach
      
This paper gives a detailed summary of the International Standardization Organization working draft concerning measurement methods for laser beam width, divergence and propagation factor.
      
The prediction isdα/d ~p -1/2-(θα - -)Q-1 whered is the laser beam width, θα is the ratio of "penetration temperature" to substrate far-field temperature, andP andQ are the dimensionless laser-scan speed and absorbed power, respectively.
      
The applied energy density was 300 mJ/cm2 with a 1.5-mm laser beam width.
      


In an underdense plasma, the laser wave equation is given with higher-order-relativistic (HOR) effect. A variational methed is used to study HOR effect for intense laser beam propagation in plasma channel including diffraction, pre-formed plasma channel guiding and lower order relativistic effects. In the paraxial approximation, a potential well also exists for laser spot size. HOR effect decreases the amplitude of laser spot size oscillation, whereas accelerates its rate. Furthermore, it prevents the singularity...

In an underdense plasma, the laser wave equation is given with higher-order-relativistic (HOR) effect. A variational methed is used to study HOR effect for intense laser beam propagation in plasma channel including diffraction, pre-formed plasma channel guiding and lower order relativistic effects. In the paraxial approximation, a potential well also exists for laser spot size. HOR effect decreases the amplitude of laser spot size oscillation, whereas accelerates its rate. Furthermore, it prevents the singularity of infinite intesity of laser beam when laser power is greater than (or equal to) the relativistic critical power. The condition of balance-solution of the beam spot size is also given.

给出了低密度等离子体中包含高阶相对论效应的激光场传输方程 .用变分法研究了强激光束在等离子体通道中传输时包括真空衍射、等离子体通道和低阶与高阶相对论效应对传输的影响 .在傍轴近似下 ,激光束宽依然有“势阱”方程 .当激光强度较大时 ,高阶相对论效应变得重要 :它一方面减小激光束宽的振荡幅度 ,另一方面又加快激光束宽的振荡速度 .当激光功率大于 (等于 )相对论临界功率时 ,高阶相对论效应避免了激光强度随传输距离出现无穷大的奇异性 .同时 ,给出了考虑高阶相对论效应后激光束宽平衡解的存在条件 .

To obtain the correct beam width value,CCD noise,lowest and higher-order Gaussian laser beam are simulated.According to ISO 11146 standard,laser beam width is calculated in second-order moment arithmetic.To mitigate the influence of CCD noise on measuring result,integral part and integral area are varied to get different results.Based on the analysis of these results,a new adaptive algorithm is presented.The appropriate integral area could be obtained to calculate right beam width value.The adaptive algorithm...

To obtain the correct beam width value,CCD noise,lowest and higher-order Gaussian laser beam are simulated.According to ISO 11146 standard,laser beam width is calculated in second-order moment arithmetic.To mitigate the influence of CCD noise on measuring result,integral part and integral area are varied to get different results.Based on the analysis of these results,a new adaptive algorithm is presented.The appropriate integral area could be obtained to calculate right beam width value.The adaptive algorithm could abide heavy CCD noise,and define the corresponding integral area according to requested precision.Finally,the experiment to measure the M~2 factor of the semiconductor laser beam with CCD camera system is performanced.The adaptive algotithm is used to define the integral area and calculate the beam width.Based on the result,the M~2 factor of the laser beam is obtained by curve fitting.The final result demonstrates the feasibility of the adaptive algorithm.

为了获取激光束的准确束宽值,模拟了基模和高阶模的高斯光束以及CCD噪声,并根据国际标准ISO 11146规定的二阶矩算法计算激光束宽。为减小CCD噪声对测量结果的影响,通过改变积分项以及积分范围,对积分结果进行分析,提出了一种新的自适应方法来确定理想积分范围大小,从而获取准确束宽值。这种自适应方法对CCD噪声有较好的鲁棒性,并可以根据指定精度来确定参与积分的窗口大小范围。利用实际CCD采集系统进行了半导体激光器的M2因子测量实验,利用该自适应方法确定积分范围,计算激光束宽,并进行曲线拟合求得激光束的M2因子。结果证明了该种方法的可行性。

 
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