像散对周期性局域空心光束的影响  

Influence of Astigmatism on Periodic Bottle Beam

作　　者：李冬[1] 吴逢铁[1] 李攀[1] 谢晓霞[1] 

机构地区：[1]华侨大学信息科学与工程学院福建省光传输与变换重点实验室,福建厦门361021

出　　处：《光学学报》2014年第13期414-419,共6页Acta Optica Sinica

基　　金：基金项目：国家自然科学基金（61178015）、福建省自然科学基金（2012J01278）

摘　　要：无衍射贝塞尔光束经轴棱锥线聚焦后可以产生周期性局域空心光束，基于菲涅耳一基尔霍夫衍射理论分别分析了椭圆加工误差和光束斜人引起的像散对轴棱锥聚焦无衍射贝塞尔光束产生的局域空心光束的影响。当椭圆加工误差或者贝塞尔光束的倾斜入射角度控制在一定的小范围内时，像散对周期性局域空心光束的特性影响不大，局域空心光束还保持它的周期性和封闭性，轴棱锥的折射率或底角越大这个范围就越小，局域空心光束就容易受到椭圆加工误差或者光束斜人射引入的像散的影响。该研究结果对周期局域空心光束的应用具有指导意义。influence generated influence Periodic bottle beams can be generated by a line focusing Bessel beam illuminated on an axicon, the of astigmatism introduced by elliptical manufacture error and oblique illumination on the bottle beam by line focusing Bessel beam using axion is analyzed in terms of Fresnel-Kirchhoff diffractive theory. The of astigmatism on the bottle beam is not big and the bottle beam still keeps its periodicity and ring closed characteristic, as long as the astigmatism is limited in a small range. The larger the base angle or the refractive index of the axicon is, the smaller the range is, and the more susceptible to the astigmatism introduced by the elliptical manufacture error and oblique illumination the bottle beam is. The result may serve as a guideline in the application of the periodic bottle beam.

关 键 词：物理光学 周期性局域空心光束 像散 椭圆轴棱锥 斜入射 

分 类 号：O436.1[机械工程—光学工程]