Electro-convective diffractive device

Details Electro-convective diffractive device Electro-convective diffractive device

2008-01-01

2008-01-01

Nguyen, Dung T. (Department: 2871)

Liquid crystal cells, elements and systems

Liquid crystal optical element

Liquid crystal diffraction element

C349S088000, C349S193000

Reexamination Certificate

active

07315345

ABSTRACT:
A method for producing a diffraction grating is provided. First, a mixture including nematic liquid crystal, dopant, and polymerizable precursor is introduced between two electrically conductive substrates having alignment layers for inducing orientation of the liquid crystal director. A potential difference is applied across the liquid crystal to cause a spontaneous self-assembly of the liquid crystal into an array of convective rolls. Thereafter, the roll structure is stabilized by the creation of a polymeric network through polymerization and/or cross-linking of the polymerizable precursor. The convective roll structure serves as a template for the formation of the polymeric network.

REFERENCES:
patent: 4590146 (1986-05-01), Wallbillich
patent: 5434685 (1995-07-01), Pirs et al.
patent: 5995173 (1999-11-01), Barberi et al.
patent: 6122024 (2000-09-01), Molsen et al.
patent: 6864931 (2005-03-01), Kumar et al.

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