Analysis of wavefront errors introduced by encoding computer-generated holograms.
Analysis of wavefront errors introduced by encoding computer-generated holograms.
复制标题
DOI：
10.1364/ao.52.008324
复制
发表时间：
2013-12
期刊：
影响因子：
1.9
通讯作者：
Wenrui Cai;P. Zhou;Chunyu Zhao;J. Burge
中科院分区：
文献类型：
--
作者：
Wenrui Cai;P. Zhou;Chunyu Zhao;J. Burge
用电子束或激光刻写机制作计算全息图（CGH）时，特别需要用多边形段来近似理想计算全息图的连续光滑条纹。在此过程中引入的波前相位误差取决于多边形段的大小和条纹的形状。在本文中，我们提出了一种方法来估计波前误差和它的空间频率，允许优化的多边形尺寸所需的测量精度。计算机仿真和干涉仪直接测量验证了该方法的有效性。
The fabrication of computer-generated holograms (CGH) by e-beam or laser-writing machine specifically requires using polygon segments to approximate the continuously smooth fringe pattern of an ideal CGH. Wavefront phase errors introduced in this process depend on the size of the polygon segments and the shape of the fringes. In this paper, we propose a method for estimating the wavefront error and its spatial frequency, allowing optimization of the polygon sizes for required measurement accuracy. This method is validated with computer simulation and direct measurements from an interferometer.