三维光场的计算全息设计与再现研究

The Design and Reconstruction of Computer-generated Holograms of Three-dimensional Light Fields

三维全息成像是利用全息术在空间形成立体图像的技术。一个三维物体,可以沿光轴方向分为一系列二维断层图像的组合。利用高效、快速的三维Gerchberg-Saxton算法,生成位相型傅里叶计算全息图,并加载在液晶空间光调制器上,理想地重构出高质量的三维光场,实验结果表明,图像清晰连贯,对比度高,噪声小。该技术在医学、军事、三维显示、微加工以及显微技术等领域有重要应用价值。

Three-dimensional（3D） holographic imaging is a technique to generate cubic images with holography.A 3D object can be divided into a series of two-dimensional slices along the optical axis.With an efficient and fast three-dimensional Gerchberg-Saxton algorithm,phase-only Fourier holograms for 3D objects is generated.Then the holograms are loaded onto a liquid crystal spatial light modulator and the 3D light fields along the optical axis are obtained.The light fields are explicit and coherent,with high contrast and low noise.This technique is applicable in medicine,military,3D display,micromachining and micro-technology.