基于HOE的全息显示双目视差构建方法

Construction method of binocular parallax for holographic display based on HOE

全息光学元件(Holographic Optical Element,HOE)是全息三维显示的重要器件之一。为了解决HOE用于双目全息显示时视差不匹配的问题,本文提出并实现了一种基于HOE的全息显示双目视差构建方法,同时对元件成像时的像差进行了分析校正。通过对HOE的制作原理和成像规律分析,结合光线跟踪技术渲染的虚拟模型和现实场景模型,设计了基于HOE的全息双目显示系统,提出了双目视差构建方法,即在获取人眼坐标位置时为观察者实时提供包含双目视差关系的视点图像。通过进一步分析全息显示系统内部的图像畸变产生原因及过程,提出了去畸变的优化处理算法。实验结果表明,提出的方法不仅能够实现HOE实时显示全息三维图像,而且解决了HOE在全息双目显示中视差不匹配以及成像畸变的问题。

Holographic optical element(HOE)is one of the important devices for holographic 3D display.In order to solve the problem of parallax mismatch when HOE is used for binocular holographic display,this paper proposes and implements a holographic display binocular parallax construction method based on HOE.At the same time,the aberrations of the components are analyzed and corrected.By analyzing the production principle and imaging rule of HOE,combining the virtual model rendered by ray tracing technology and the real scene model,a holographic binocular display system based on HOE is designed,and a binocular parallax construction method is proposed,that is,a real-time view image containing binocular parallax relationship is provided for the observer when acquiring the coordinate position of the human eye.By further analyzing the cause and process of image distortion in holographic display system,an optimization algorithm to remove the distortion is proposed.Experiment results show that the proposed method can not only realize the HOE display holographic 3D image in real time,but also solve the problem of parallax mismatch and image distortion in the holographic binocular display of HOE.