Bessel光束经柱透镜的衍射光场

Diffraction Optical Field of Bessel Beam Passing Through Cylindrical Lens

基于空间域中的广义惠更斯-菲涅耳衍射积分理论,导出Bessel光束通过柱透镜光强分布表达式,利用计算机模拟不同传播距离处的截面光强分布.利用轴棱锥产生Bessel光束,光束经过焦距为130mm的柱透镜,用CCD拍摄柱透镜的后不同传播距离的处光强分布.结果表明:实验所得结果与理论模拟吻合,Bessel光束经柱透镜后将产生唇状焦散光束.

In this paper,propagation process of Bessel beam which generated by axicon passing through cylindrical lens was studied.Based on the generalized huygens fresnel diffraction integral,the expression of the light intensity distribution that Bessel beam passing through cylindrical lens is given.The transverse intensity distribution in different position was numerical simulated.In the experiment,generated Bessel beam by axicon through the cylindrical lens which f=130mm.The optical intensity distribution in difference propagation distances was captured by a CCD camera.The theoretical analysis and the experimental results both show that Bessel beam passing through cylindrical lens can generate diffraction-free caustics beam.