【摘要】 应用ABCD定律计算了平面光波经过一个光阑-透镜组合系统的衍射场.应用瑞利散射理论,计算了光与Rayleigh粒子(半径小于波长)的相互作用力.数值计算表明:光阑的大小、透镜的焦距、光的波长以及粒子周围介质的选择对于光阱力都有重要的影响,光阑的加入增加了光学系统的可调性.这些结果对实验参数的选择、调节和实验结果的评价具有一定的指导意义.更多还原

【Abstract】 This paper calculated the diffracted field of the plane wave propagating through an aperture-lens optical system based on the ABCD law and the interaction forces between light and the Rayleigh particle based on the Rayleigh scattering theory.Numerical calculation shows that the trapping forces can be modulated effectively by changing the parameters,such as the size of the aperture,the focus length of the lens,the wavelength of light and the selection of medium around particle.The aperture can enhance the adjustability of the optical system.These results are useful to the choice and modulation of the experimental parameters and the evaluation of the results of the experiments更多还原