光学学报, 2010, 30 (8): 2417, 网络出版: 2010-08-13   

一种产生无衍射贝塞尔光束的新型组合锥透镜 下载: 602次

A New Type of Combined Axicon for Generating Non-Diffracting Bessel Beams
作者单位
华侨大学 信息科学与工程学院,福建 泉州 362021
摘要
提出一种可产生无衍射贝塞尔(Bessel)光束的新型光学元件--组合锥透镜,由正、负轴棱锥胶合在一起设计而成。其变换光束特性与单个正轴棱锥相同,等效底角由正、负轴棱锥底角之差决定,因此可通过较大底角的正、负轴棱锥组合得到更小角度的底角,以获得更长距离的无衍射光,解决了单个正轴棱锥小角度加工困难的技术问题。推导出组合锥透镜的ABCD传输矩阵,数值模拟平面波通过组合锥透镜后的光场为无衍射Bessel光束,并从几何光学角度用Zemax软件模拟组合锥透镜后的光场分布,与正轴棱锥后的光场进行了比较。研究结果为实现无衍射Bessel光束开辟一条新的途径。
Abstract
A new type of optical element--combined axicon is proposed for generating non-diffracting Bessel beams.This element is designed with gluing positive and negative axicon.Its property is the same as single positive axicon for beam transformation,and equivalent conical angle is decided by the conical angle difference of positive and negative axicon.Therefore,we can get smaller conical angle by combining positive and negative axicon with comparatively large conical angle for each axicons,and also get non-diffracting beam with longer distance.The technical problem of the small conical angle which is hard to machining is solued.The ABCD matrix of the combined axicon is deduced.It shows that the combined axicon can transform plane wave to Bessel beam by numerical calculation.The optical field distribution behind combined axicon is also simulated by Zemax software,and compared with single positive axicon.Research results open a new way for generating non-diffracting Bessel beams.
参考文献

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马亮, 吴逢铁, 黄启禄. 一种产生无衍射贝塞尔光束的新型组合锥透镜[J]. 光学学报, 2010, 30(8): 2417. Ma Liang, Wu Fengtie, Huang Qilu. A New Type of Combined Axicon for Generating Non-Diffracting Bessel Beams[J]. Acta Optica Sinica, 2010, 30(8): 2417.

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