强激光与粒子束2011，Vol.23Issue(7)：1758-1762,5.DOI:10.3788/HPLPB20112307.1758
光阑对平面光波傍轴性的影响
Effect of apertures on paraxiality of plane wave
摘要
Abstract
According to definition of degree of paraxiality for a monochromatic light beam, the effects of a circular aperture and a rectangular aperture on the paraxiality of a plane wave have been investigated,respectively. Analytical expressions of degree of paraxiality for a plane wave diffracted by a circular aperture and a rectangular aperture have been derived. If a plane wave is dif-fracted by a circular aperture or a rectangular aperture, the corresponding paraxiality decreases, which means that degree of parax-iality of the diffracted plane wave is smaller than one. Decreasing quantity of degree of paraxiality is determined by the ratio of ap-erture dimension to incident wavelength. The numerical results show that degree of paraxiality of the diffracted plane wave quickly augments from zero and then trends to a saturated value with increasing the ratio of aperture dimension to incident wavelength. However, paraxiality of a diffracted plane wave is independent of aperture shape.关键词
平面光波/傍轴度/光阑/衍射Key words
plane wave/paraxiality/aperture/diffraction/分类
数理科学引用本文复制引用
周国泉..光阑对平面光波傍轴性的影响[J].强激光与粒子束,2011,23(7):1758-1762,5.基金项目
国家自然科学基金项目(10974179) （10974179）
浙江省自然科学基金项目(Y1090073) （Y1090073）
