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US 4,784,470 AGranted
Optical switching device
AssigneeITT Defense Communications, a division of ITT Corporation
InventorAnthony P. Baker
Life of this patent
Estimating the term…
Abstract
An optical switching device includes first and second polarization changing cells, the polarization changing cells utilize twisted nematic liquid crystal material to effect the change of polarization. The resultant device exhibits reduced cross talk between the output ports thereof and requires less voltage to effect the switching of the output beam therebetween.
Claims15
An optical switching device;
- said device comprising:
- means for splitting an incident light beam into first and second polarized components, said means for splitting said incident light beam including a liquid crystal material;
- means for selectively changing the polarization of said polarized components;
- and
- means for recombining said components, said means for recombining said components of said incident light beam including a liquid crystal material whereby said two components are both directed to one of two different output ports.
2 more elements
Dependencies are inferred from the claim text.