这些结果表明，改变聚焦透镜的焦距和聚焦透镜到轴棱锥间的距离以及光阑半径，可有效地改变局域空心光束的暗中空区域。
It is shown that by changing the focal length of focal lens and the distance between the axicon and the lens, the center of dark of the bottle beams can be altered effectively.
结果表明，齿形光阑能有效抑制光强的高频衍射，并降低横向光强分布的不均匀性。
It is shown that, the use of serrated apertures can suppress the high frequency diffraction of axial intensity and reduce the nonuniformity of transversal intensity distributions.
当外孔大于1.5倍束腰时，衍射后轴上光强调制被有效压抑，这为选择光阑提供了合理参数。
While the modulation characteristics disappear as the outer circular aperture is bigger than 1.5 times of the beam waist size, the results offer reasonable aperture parameter for diffraction.
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