| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of an optical element keeping an optical uniformity related to refractive index anisotropy, etc., of a liquid crystal material and with high productivity by making an orientation fixing processing temp. a specified range. SOLUTION: In a manufacturing method or an optical element orientation- fixing and laminating a liquid crystal material film on at least one side of a base material having translucency, an orientation-fixing processing temp. To is within the range shown by Tg →n <To<=Tg →n +2(Tc-Tg →n )/3. Where, Tg →n shows a temp. generating a liquid crystal phase and Tc shows a transition temp. from the liquid crystal phase to an isotropic phase. The base material to be used and having translucency is optically uniform and is not limited particularly if it has a shape hold property and e.g. a glass plate, a glass film, a synthetic resin film, etc., are listed. As the synthetic resin film, the film made of e.g. polycarbonate. polysulfone, etc., is listed. |
