Dresel T, Beyerlein M, Schwider J
Appl Opt. 1996 Dec 10;35(35):6865-74. doi: 10.1364/AO.35.006865.
Computer-generated phase-only holograms can be used for laser beam shaping, i.e., for focusing a given aperture with intensity and phase distributions into a pregiven intensity pattern in their focal planes. A numerical approach based on iterative finite-element mesh adaption permits the design of appropriate phase functions for the task of focusing into two-dimensional reconstruction patterns. Both the hologram aperture and the reconstruction pattern are covered by mesh mappings. An iterative procedure delivers meshes with intensities equally distributed over the constituting elements. This design algorithm adds new elementary focuser functions to what we call object-oriented hologram design. Some design examples are discussed.
计算机生成的纯相位全息图可用于激光束整形，即把具有强度和相位分布的给定孔径聚焦成其焦平面上的预定强度图案。一种基于迭代有限元网格自适应的数值方法允许为聚焦到二维重建图案的任务设计合适的相位函数。全息图孔径和重建图案都由网格映射覆盖。一个迭代过程产生强度在构成元素上均匀分布的网格。这种设计算法为我们所谓的面向对象全息图设计增添了新的基本聚焦器函数。讨论了一些设计示例。
