基于多屏平动扫描的体积显示  

Volumetric Display by Scanning with Multi-screen in Parallel Motion

作　　者：李立新[1] 沈海锋[1] 江玉刚[1] 李小虎[1] 

机构地区：[1]浙江大学机械设计研究所,杭州310027

出　　处：《光电工程》2010年第9期86-90,97,共6页Opto-Electronic Engineering

摘　　要：针对基于往复平移扫描的体积显示方式中存在的动态调焦、放大率校正和振动噪声问题,提出一种基于多个成像屏平动扫描的体积显示方法。该方法包括多个作圆周平动的成像屏和反光镜,使得从静止投影仪到运动成像屏之间的光程保持不变,从而在成像空间中形成一个大小不变且清晰的二维图像序列,避开了动态调焦和放大率校正问题;借助视觉暂留效应,此二维图像序列被感知为一个具有物理景深的三维图像,该三维图像没有物理死区且允许大小一致的体素均匀分布其间。由于各运动部件均匀分布在相应的圆周上并作匀速运动,各惯性力自动平衡,从而解决了振动噪声问题。制作原理样机并试验验证了该方法的可行性。To solve the problems of dynamic focusing, correction of magnification, and vibration with noise in volumetric 3D display technique by reciprocating scanning, a method of volumetric 3D display by scanning with multi-screen in parallel motion is proposed. In this method, multi-screen and multi-mirror in circle-curvilinear motion are adopted to maintain the optical path constant between fixed projector and moving screen, so as to form a size-invariable and sharp focused 2D image sequence, avoiding the problem of dynamic focusing and correction of magnification. With the persistence of vision, the 2D image sequence is perceived as a 3D image with physical depth in which uniform voxels are allowed to be arranged uniformly without physical dead zone. By arranging all the moving components symmetrically in correspondittg circles and driving them in even velocity, the inertia forces are balanced automatically so as to solve the problem of vibration with noise. A prototype is manufactured and the method is verified by experiments.

关 键 词：体积显示 多屏平动 光程不变 振动噪声 往复扫描 

分 类 号：TP368[自动化与计算机技术—计算机系统结构]