the volume being generated by a moving, e.g. vibrating or rotating, surface

Full Title

Stereoscopic video systems; Multi-view video systems; Details thereof > Image reproducers (optical systems for producing stereoscopic or other three-dimensional [3D] effects G02B30/00) > Volumetric displays, i.e. systems where the image is built up from picture elements distributed through a volume > the volume being generated by a moving, e.g. vibrating or rotating, surface