Vasara A, Turunen J, Friberg A T
Department of Technical Physics, Helsinki University of Technology, Espoo, Finland.
J Opt Soc Am A. 1989 Nov;6(11):1748-54. doi: 10.1364/josaa.6.001748.
A new class of solutions to the scalar wave equation was introduced recently that represents transversely localized but totally nondiffracting fields. We show by the method of stationary phase that any of these wave fields can be realized approximately with a laser and a single computer-generated hologram. We briefly discuss various techniques for coding and fabrication of the required hologram and the associated diffraction efficiencies. Using both binary-amplitude and four-level phase holograms, we demonstrate experimentally the formation of arbitrary-order Bessel beams and rotationally nonsymmetric beams.
最近引入了一类标量波动方程的新解，它表示横向局域但完全无衍射的场。我们通过驻相法表明，这些波场中的任何一个都可以用激光和单个计算机生成的全息图近似实现。我们简要讨论了用于编码和制造所需全息图的各种技术以及相关的衍射效率。使用二值振幅全息图和四值相位全息图，我们通过实验证明了任意阶贝塞尔光束和旋转非对称光束的形成。
