| 摘要 |
PURPOSE: A manufacturing method of a polarized light device is provided to prevent the deterioration after leaving under the sun, to have excellent color endurance, to prevent the leakage of the iodine complex, and to have an excellent optical property such as the transmittance and polarization. CONSTITUTION: A manufacturing method of a polarized light device comprises a swelling step of a polyvinyl alcohol film, a staining step, a cross-linking step, and an elongation step. And after the staining step, a step in which dipping the polyvinyl alcohol film into an aqueous solution containing the acetylacetonate metal salt or the hydrate is added. Considering the convenience of the process, the step is able to be performed with the cross-linking step at the same time by containing the polyvinyl alcohol film with the acetylacetonate metal salt or the hydrate in the cross linkage aqueous. |
