Multi-user glasses free 3D display using an optical array

This paper describes the design and building of a novel stereoscopic display that does not require the wearing of special eye-wear (autostereoscopic) and employs head position tracking in order to enable a large degree of freedom of viewer movement and the display of the minimum amount of information. A stereo image pair is produced on a single liquid crystal display (LCD) by simultaneously displaying left and right images on alternate rows of pixels. Novel steering optics controlled by the output of a head position tracker is used to direct regions, referred to as exit pupils, to the appropriate viewers´ eyes.