Television applications of PLZT ceramics
William E. Perry, Bert M. Soltoff · Ferroelectrics · 1976
This paper describes applications of PLZT ferroelectric ceramic devices to television systems, including usage as variable neutral density filters, selective spectral filters, and as light gates in a system for stereoscopic television viewing. The stereoscopic system describes the use of PLZT light gates to permit stereo viewing over a wide angle with minimal interference to normal vision. Low power switching circuitry has been developed to permit extended operation with a battery power source. Principles of operation, together with block diagrams, are included. In addition, a ruggedized bonded holder assembly which permits encapsulating the PLZT element in a transparent elastomer is described. This technique increases the allowable operating potential, and provides mechanical protection.