The Effects of Astigmatic Lens on the Focal Switch of the H-G Beams 透镜的像散对H-G光束的焦开关影响
From the propagation theory of partially coherent light, spectral anomalies and spectral switches of Gaussian Schell-model beams focused by an astigmatic aperture lens are studied. 研究了部分相干高斯-谢尔模型光束经过整数阶螺旋形位相板之后形成的部分相干涡旋光束,着重研究这种部分相干涡旋光束的传输特性。
Focusing Properties of Non-uniformly Polarized Beams through an Astigmatic Lens with Annular Aperture 非均匀偏振光束通过环状光阑像散透镜的聚焦特性
A simple method using an astigmatic cavity to determine the thermal lens of laser crystals is reported. 给出一种测量激光器稳定运转时增益介质中热透镜焦距的方法。
Parameter changes of Gaussian beams after passing through astigmatic lens 高斯光束通过像散透镜后光束参数的变化
Based on the Collins formula, the propagation expression of astigmatic Cosh-Gaussian beams passing through a bifocal lens system is derived. 基于Collins公式,推导了有像散双曲余弦高斯光束通过双焦透镜系统后的解析传输公式,分析了该光束轴上光强分布和焦移。
Taking the second-order-moment and power of the bucket as the beam width definition, changes of the beam parameters such as the beam width and far-field divergence angle of Gaussian beams after passing through an astigmatic lens are studied both analytically and numerically. 以二阶矩和环围功率作为束宽定义,对高斯光束通过像散透镜后光束参数,包括束宽和远场发散角作了解析和数值研究。
As no correcting astigmatic difference As of the semi-conductor laser, the focal point of a collimating objective lens is located substantially at the beam divergent posit-ion of a semi-conductor laser in a plane perpendicular to the junction plane; 在不修正半导体激光器象散值△s时,准直物镜的焦点基本上位于半导体激光器结平面的垂直平面光束原始发散点位置上;
Influences of an Astigmatic Lens on Cosh-Gaussian Beams 像散透镜对双曲余弦高斯光束的影响
The analytical expression for the axial irradiance distribution of cosine-squared Gaussian beams passing through an astigmatic lens is derived using the Collins formula. 利用Collins公式推导出了余弦平方-高斯光束通过像散透镜聚焦后轴上光强分布的解析表达式,通过数值运算并对计算结果进行了详细分析。
The analytical formula for the beam width of sin-Gaussian beams passing through an astigmatic lens is derived by using the second-order moment method. 应用二阶矩法推导出了正弦-高斯光束通过像散透镜后束宽的解析表达式。
By numerical calculation, the beam parameters, such as the beam width and far-field divergence angle of sin-Gaussian beams passing through an astigmatic lens are studied. 通过数值计算对正弦-高斯光束通过像散透镜后的光束参数,例如束宽和远场发散角等参数作了研究。
By changing the Fresnel number the focal switch can also be produced under certain conditions. 3. The focal switch of elegant cosh Gaussian beams focused by an astigmatic lens is studied in detail and the influence of parameters on the focal switch are investigated. 详细研究了复宗量双曲余弦高斯光束通过像散透镜聚焦后的焦开关现象,分析了光束参数、像散参数、菲涅尔数及光学系统几何参数对焦开关现象的影响。
Based on the propagation theory of laser beams, the change of beam parameters, focal switch and beam shaping of laser beams after passing through an astigmatic lens are analysed in the present thesis. 1. 本文以激光光束传输理论为基础,研究讨论了激光光束通过像散透镜聚焦后光束参数的改变,焦开关现象及光束整形等。