体3维显示是真3维显示领域最前沿的一种解决方案，其优点是可以直接、多人、多角度同时观察。为了在真实空间显示复杂3维图像，研究并实现了一种基于数字微镜的被动式旋转体扫描3维显示系统，即首先利用人眼的视觉暂留特性，通过数字微镜将序列2维图像切片快速投影至旋转屏来完成真实3维图像的显示；同时分析了系统的组成和原理，并详细讨论了成像空间、体素激活装置和体3维引擎的硬件设计思想与软件核心算法。三棱锥和飞机实体模型的3维显示实验结果表明，用户可在360°范围内观察到轮廓清晰、立体感强的物体3维图像，说明该系统具备在真

Volumetric 3D display(V3D) is one of the newest solutions in the true 3D display field. Its primary advantages are direct, group and all point of viewing. In order to display a complex 3D image in real space, a passive rotating sweep V3D system based on digital micro mirror device(DMD) is studied and realized, in which a sequence of two dimensional slices of a 3D image are projected onto a rotating screen by DMD. Due to the vision persistence of human eyes, the image is reconstructed in the cylindrical volume swept out by the screen. The composition and principle of the system are analyzed, while the hardware design and software algorithms of the image space, voxel activation device and V3D engine are discussed in detail. The two V3D experiments with models of tri cone and plane indicate that users can observe solid 3D images with clear profiles in the scope of 360 degree, and the result validates the design and shows that the system can display complicated 3D images in real space.