【摘要】 利用Li近期提出的平顶光束新模型,分别推导出柱坐标系下平顶光束的M2因子和通过傍轴ABCD光学系统传输后光场分布的解析公式。以透镜系统为例,给出了柱坐标系下平顶光束聚焦场分布的解析表达式,并对平顶光束的聚焦特性进行了详细分析。研究表明,平顶光束的M2因子仅由其阶数M确定,其聚焦特性与阶数M以及系统的菲涅尔数N等有关。更多还原

【Abstract】 Making use of the new model of falt-topped light beams proposed by Li recently,the analytical expressions of the M~2-factor and the field distribution of flat-topped light beams passing through a paraxial ABCD optical system have been derived,respectively.The lens system is taken as an example and the analytical expression of the focusing field distribution of flat-topped light beams is given.The focusing properties of flat-topped light bemas have been analyzed in detail.The results have shown that the M~2-factor is only decided by the order M,the focusing properties relate to the order M and the Fresnel number N of the system.更多还原