Loading patent…
AssigneeStanley Electric Co., Ltd.
InventorsMasanobu Aizawa, Shigekazu Yamauchi, Jean F. Clerc, Shunji Takenaka, Shinichi Hirose
Estimating the term…
A method of manufacturing an optical compensator sheet comprising the steps of providing a sheet of ionomer, which ionomer is bridged with sodium or magnesium ions, stretching said sheet of ionomer along one direction in the plane of sheet, so as to generate uni-axial optical anisotropy of predetermined amount having an optical axis along the stretched direction, sandwiching said stretched sheet of ionomer between a pair of substrates, putting said sandwiched sheet in an evacuatable heat-resisting bag, evacuating and sealing said bag, loading said bag in an autoclave furnace and applying heat and pressure to said sheet in said autoclave furnace at a temperature not less than the melting point of the sheet. The stretched sheet has a positive optical anisotropy along the stretched direction. The sheet after heat and pressure treatment has a negative optical anisotropy along the normal to the sheet.
A method of manufacturing an optical compensator sheet comprising the steps of:
A method of manufacturing an optical compensator sheet comprising the steps of:
An optical compensator mainly formed of an ion-containing polymer, shaped in a sheet, and having a refractive index in the direction perpendicular to the plane of sheet smaller than refractive indices in directions in the plane of sheet, said optical compensator prepared by stretching said sheet of ion-containing polymer in one direction in the plane of the sheet thereby generating an optical anisotropy having a high refractive index in the stretched direction.
Dependencies are inferred from the claim text.