三维物体计算全息的方法研究

Study on computer-generated holography of three-dimensional object

为了探索提高三维物体计算全息图的生成速度的方法,比较了两种不同的方法。根据全息理论,对三维物体计算全息图的生成方法和原理进行了简单介绍。采用离轴全息进行的点源法和同轴全息进行的层析法分别对简单三维物体的全息图进行计算,同时对两种方法的特点和局限性进行了简单的比较,点源法方法简单,但运算速度较慢;层析法则需要在保证纵向分辨率的同时尽可能少的减少分层数量。最后,讨论了提高三维物体计算全息图生成效率的有效途径。

In order to improve the generating speed of the computer-generated hologram （CGH） of 3D objects, two different methods are compared. The generating method and principle of 3D CGI-I are introduced in brief according to the holographic theory. The holograms of simple 3D objects are calculated by the means of the point source method for off-axis holography and the chromatography approach for coaxial holography. The characteristics and limitations of the two methods are compared. The re- suits show that the point source method is simple, but its operation speed is slow; the chromatography approach requires that the number of hierarchy should be reduced as less as possible while ensuring the vertical resolution. Finally the efficient path of improving the generating efficiency of 3D computer-generated hologram is discussed.