一种聚焦获得长焦深贝塞尔高斯光束新型光学透镜

Novel optical lens acquiring long focal depth Bessel gauss light beams through focusing

Abstract

The invention discloses a novel optical lens acquiring long focal depth Bessel gauss light beams through focusing. The novel optical lens comprises a multi-zone curved surface and a focusing curved surface, wherein the multi-ring curved surface and the focusing curved surface are coaxially superposed, the multi-ring curved surface is provided with rings in a concentric-circle structure, surfaces of the rings are spherical surfaces or aspheric surfaces, ring-shaped optical axes are arranged among the adjacent rings, and the focusing curved surface is a spherical surface or an aspheric surface. The single lens is employed for focusing, so the Bessel gauss light beams are acquired, the energy distribution density at the center scope is quite high, quite-low focusing light beam segments are distributed at the edge, the power density scope is high, light spots are quite small, the focal depth is quite long, and light spot peak value power densities in the focal depth segment are similar. According to the novel optical lens, assembly precision requirements of the lens are common, the lens has relatively wide universality for laser beam modes, the fine laser processing technology can be improved and ameliorated, especially for the cutting technology of transparent materials.
本发明公开了一种聚焦获得长焦深贝塞尔高斯光束新型光学透镜,包括多环带曲面和聚焦曲面,所述多环带曲面和聚焦曲面以同轴方式相互叠加设置;所述多环带曲面上设置有以同心圆结构设置环带,环带表面为球面或非球面,相邻环带之间设置有环形光轴:所述聚焦曲面为球面或非球面。采用单镜片即可聚焦获得贝塞尔高斯光束,形成中心范围能量分布极高,边缘分布极低聚焦光束段,其高功率密度范围光斑极小,焦深极长,焦深段内光斑峰值功率密度相近。该种镜片装配精度要求一般,对激光束模式具有较广的普适性,可改善并提高激光精细加工工艺,特别是透明材料的切割工艺。

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    CN-105891916-AAugust 24, 2016上海嘉强自动化技术有限公司Aspherical mirror based on axicon and focusing mirror features
    DE-102016115844-A1January 04, 2018Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Friedrich-Schiller-Universität JenaAnordnung zur Erzeugung eines Bessel-Strahls