beam aperture meaning in English
波束孔径
梁口
射束孔径
Examples
- On the radiation range of l - 4gw / cm2 , the effects of the modulation in intensity , beam aperture , pulse width and intensity of 3 w on tsrs in frequency convector crystals have been analyzed in detail . the interrelated thresholds have been gained by calculating and theoretical evidences have been offered to prevent tsrs from damaging frequency conversion crystals , which will be applied to the engineering design of the laser drivers on high - fluence
光的强度调制、光束口径、脉宽和强度等因素对谐波转换晶体中tsrs的影响，并计算得出了一些相关阐值，得到了驱动器工作的临界状态，为防止出现tsrs的光损伤提供了理论依据，对高功率激光驱动器的工程设计具有实用价值。 - This thesis was divided into eight chapters , and the main results and innovations obtained here can be summarized as follows : ( 1 ) the physics model of tsrs in frequency conversion crystals has been built up firstly . based on quantum - mechanical viewpoints and the following physical processes and parameters : the two - photo interaction of light with matter , paraxial diffraction of stokes , langevin noise sources , reflection at the faces and the edges of crystals , gain coefficient , beam aperture , pulse width and fluence of 3 , the physics model of tsrs in kdp and kdp crystals acting as high - fluence frequency convector and the paraxial operator maxwell - bloch - langevin equations have been built up
全文共分八章，取得的主要成果及创新点如下： ( 1 )首次建立了谐波转换晶体的tsrs物理模型本文根据量子力学原理，在考虑如下物理过程和参量的基础上：光与物质的双光子相互作用； stokes光的傍轴衍射； langevin (郎兹万)噪声源；晶体表面反射和端面反射；增益系数、光束口径、脉宽和三倍频光能量密度，推导出高通量激光在kdp和kd ~ * p谐波转换晶体中的tsrs物理模型和空间上的近轴算符maxwell - bloch - langevin方程组。