Patent
1974-04-15
1976-03-23
Corbin, John K.
350157, G02F 103
Patent
active
039457150
ABSTRACT:
An electro-optical transducer and data storage device is operated by electrically establishing different electric field levels in a retentive ferroelectric PLZT crystal. The crystal may have a plurality of areas that serve as data storage elements, each of which is defined by crossover areas of rows and columns of transparent electrodes that are on opposite sides of the crystal, each storage element being spaced away from other storage elements of the crystal by surrounding edge regions. When a data storage element is retentively polarized by the application and removal of a voltage pulse to opposite electrodes, the portion of the crystal between the electrodes contracts transversely, establishing a strain gradient in the edge regions surrounding the data storage element. This localized strain gradient, together with a fringing electric field in the edge regions, causes a high level of birefringence there, and permits the edge regions to serve as amplitude modulators of polarized light. When light is applied on a path through a polarizer, through the crystal, and through a cross-polarized analyzer, the output of the analyzer has light from edge regions of elements which have not been polarized. The apparatus can serve as an electro-optical transducer and memory for large blocks of data, for example.
REFERENCES:
patent: 2928075 (1960-03-01), Anderson
patent: 3499704 (1970-03-01), Land et al.
patent: 3623031 (1971-11-01), Kumada
Corbin John K.
Harris-Intertype Corporation
LandOfFree
Electro-optical birefringence device employing edge effect does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electro-optical birefringence device employing edge effect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electro-optical birefringence device employing edge effect will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1640428