Electro-active lens

Details Electro-active lens Electro-active lens

2008-01-22

2010-06-01

Qi, Mike (Department: 2871)

Liquid crystal cells, elements and systems

Liquid crystal optical element

Liquid crystal diffraction element

C349S200000, C349S175000

Reexamination Certificate

active

07728949

ABSTRACT:
Embodiments of the present invention relate to a cholesteric liquid crystalline material which may be usable in an electro-active element for providing fail safe operation, polarization insensitivity, low electrical power consumption requirements, and a small number of electrical connections. The cholesteric liquid crystalline material may be usable in an electro-active element for providing a diffractive efficiency or focusing efficiency above 90% in an activated state of the electro-active element and a diffractive efficiency or focusing efficiency below 10% in a deactivated state of the electro-active element.

REFERENCES:
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patent: 7009757 (2006-03-01), Nishioka et al.
patent: 2004/0056986 (2004-03-01), Blum et al.
patent: 2005/0073739 (2005-04-01), Meredith et al.
patent: 2006/0164593 (2006-07-01), Peyghambarian et al.
patent: 2007/0159562 (2007-07-01), Haddock et al.
patent: 2007/0280626 (2007-12-01), Haddock et al.
International Search Report of Application No. PCT/US08/51709 mailed on Jul. 14, 2008.
Supplementary European Search Report corresponding to the European application No. 08728084, dated Feb. 16, 2010.

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