Patent ID: 8704822

Claim:
A volumetric display system comprising: a volumetric display arranged to generate a light field; transformation optics comprising at least a lower parabolic mirror disposed opposite to an upper parabolic mirror, the lower parabolic mirror and upper parabolic mirror forming an optical cavity and being arranged to generate an image of the first light field spatially separated from the light field; and a sensing apparatus arranged at the lower parabolic mirror of the optical cavity and arranged to optically detect a user interaction with the image of the light field via the transformation optics, the sensing apparatus being further arranged to detect a height position of the user, the volumetric display being arranged to generate the light field based on the height position, the volumetric display being further arranged to adjust a refresh rate based on a viewing angle for the user and to include a reflection image of at least part of the user in the light field.