In order to meliorating defects

such as smaller image space and fewer voxels and severer voxel overlap dead zone caused by planar rotational screen in volumetric-swept display system

the system adopted helix rotation screen to construct an imaging space in volumetric-swept display system. Considering the characteristics of the imaging space

the generation algorithm for helix slices of the 3D model was proposed.It calculated the points of intersection crossed by simple-lines of the helicoids and triangular elements of 3D model and obtained the helix slices. This algorithm dispersed the 3D model into a set of consecutive helix slices according to the angle information of the rotational helix screen. The experimental results showed that the helix rotational screen performance was superior to plane rotational screen

and the proposed algorithm is convenient and effective.