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.