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Three types of 3-D TV system compatible with existing 2-D TV systems are proposed. These systems are not based on stereoscopic image techniques and do not impose any constraints on the viewer for 3-D perception. The first system makes use of the existing conventional color TV system for development of a 3-D TV system. The second system is based on the present monochromatic TV system. The third system depends on a light-emitting diode tank for 3-D display. To prove the validity of these systems a simulated experiment is demonstrated for the reproduction of a 3-D image using still photographs. All these systems are compared for their relative merits and demerits.

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A brief review over the past and present work on stereoscopic and volumetric TV employing the conventional 2 -D TV equipments and standards has been made. The earlier 3 -D viewing systems such as direct -eye-contact types, color filter based techniques and polarization based systems are critically examined for a successful 3 -D TV. A bicircular polarization technique using electrooptic material in the picture tube screen is proposed for a 3 -D color TV.Also, a technique involving region -wise periodic illumination of the object for registering blur -free sectional images of the object needed for a volumetric 3 -D TV is proposed.