DIGITAL RECORDING USING HOLOGRAM ARRAYS:LASER-BEAM DEFLECTION AND MODULATION

摘要

The feasibility of optical methods of recording a digital television signal in real¬time depends inter-alia on the successful development of devices for modulating and deflecting laser beams. For recording using the holographic approach, these devices must be able to handle many data channels in parallel and be optically efficient. Various methods have been investigated, and the more promising solutions are examined here in more detail. It is concluded that a solid-state digital light deflector together with a PLZT page composer could, with some further development, meet the basic recording requirements for digital television signals. For replay, an acousto-optic deflector of modest resolving power is eminently suitable.