发明名称 |
PROCESS AND MATERIALS FOR ALIGNING LIQUID CRYSTALS AND LIQUID CRYSTAL OPTICAL ELEMENTS |
摘要 |
A process for aligning liquid crystals adjacent to a surface of an optical alignment layer comprising: exposing at least one optical alignment layer, comprising anisotropically absorbing molecules, to polarized light; the polarized light having a wavelength within the absorption band of said anisotropically absorbing molecules; wherein the exposed anisotropically absorbing molecules induce alignment of a liquid crystal medium at an angle + and - with respect to the direction of the polarization of the incident light beam and along the surface of the optical alignment layer; and applying a liquid crystal medium to said optical alignment layer; wherein said anisotropically absorbing molecules consist essentially of diaryl ketones, is described. The invention also is directed to a liquid crystal optical storage medium, a liquid crystal display element, and a liquid crystal diffractive optical element made by the process of the invention and to novel polyimide compositions that are useful as optical alignment layers in the process of the invention. |
申请公布号 |
WO9737274(A2) |
申请公布日期 |
1997.10.09 |
申请号 |
WO1997US04940 |
申请日期 |
1997.03.27 |
申请人 |
ALLIANT TECHSYSTEMS INC. |
发明人 |
GIBBONS, WAYNE, M.;SHANNON, PAUL, J.;SUN, SHAO-TANG |
分类号 |
C08G73/10;G02F1/1337 |
主分类号 |
C08G73/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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