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- theta 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 |
US5807498(A) |
申请公布日期 |
1998.09.15 |
申请号 |
US19960624945 |
申请日期 |
1996.03.29 |
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;(IPC1-7):C09K19/56;C09K19/52;C09K19/00 |
主分类号 |
C08G73/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|