分析表明，焦移的大小与菲涅尔数、透镜-光阑的分离程度以及入射波波面曲率半径等因素有关，并得出了消除焦移的条件。
The analysis that the size of the focal shift is related to the factors such as Fresnel number, separating degree of lens-diaphragm and curvature radius of incident wave wavefront, etc.
数值计算表明，聚焦双曲正弦高斯光束的焦移与偏心参数和菲涅耳数有关，焦移随偏心参数和菲涅耳数的减小而增大。
Numerical calculations are performed and show that the focal shift in focused sinhGaussian beams depends on the Fresnel number and decentered parameter, and increases with decreasing them.
利用数值计算详细分析和说明了偶数模厄米高斯光束的轴上光强分布和焦移。
The axial intensity distribution and focal shift of H-G beams with even mode Numbers are analyzed and illustrated with detailed numerical examples.
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