A new approach for generating long‐distance self‐healing Bessel beams, which is based on a ring‐shaped (annular) lens and a spherical lens in 4f‐configuration, is reported. With this, diffraction‐free light evolution of a zeroth order Bessel beam over several meters is shown and available scaling opportunities that surpass current technologies by far are discussed. Furthermore, it is demonstrated how this setup can be adapted to create Bessel beam superpositions, realizing the longest ever reported optical conveyor beam and helicon beam, respectively. Last, the self‐healing capabilities of the beams are tested against strong opaque and non‐opaque scatterers, which again emphasizes the great potential of this new method.

中文翻译：

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自由空间远距离自愈贝塞尔光束的实现

报道了一种新的产生远距离自愈贝塞尔光束的方法，该方法基于环形（环形）透镜和4 f配置的球面透镜。这样，可以显示零米级Bessel光束在几米范围内的无衍射光演变，并讨论了迄今为止超越现有技术的可用缩放机会。此外，还演示了如何将该设置调整为创建贝塞尔光束叠加，从而分别实现有史以来最长的光学传输光束和螺旋光束。最后，光束的自愈能力针对不透明和不透明的强散射体进行了测试，这再次强调了这种新方法的巨大潜力。