Abstract: Provided is a method for manufacturing an optical laminated body having a substrate and a polarizing film that contains a lyotropic liquid crystal compound and is formed on the substrate. The method includes a step (A) of applying a coating liquid containing the lyotropic liquid crystal compound and a solvent onto the substrate and forming a coat film with the lyotropic liquid crystal compound orientated in one direction, and a step (B) of applying a magnetic field to the coat film in a direction substantially parallel to an orientation direction of the lyotropic liquid crystal compound.

Abstract: Provided is a method for manufacturing an optical laminated body having a substrate and a polarizing film that contains a lyotropic liquid crystal compound and is formed on the substrate. The method includes a step (A) of applying a coating liquid containing the lyotropic liquid crystal compound and a solvent onto the substrate and forming a coat film with the lyotropic liquid crystal compound orientated in one direction, and a step (B) of applying a magnetic field to the coat film in a direction substantially parallel to an orientation direction of the lyotropic liquid crystal compound.

Abstract: A polarizer of the present invention is characterized by containing at least one species of a photochromic dye in a resin. Preferably, the photochromic dye is used as a dichroic dye and aligned in one direction in the resin. A circular polarizing filter of the present invention has the polarizer and a retardation plate. In the polarizer of the present invention, the photochromic dye is colored by ultraviolet light irradiation and discolored by visible light irradiation or heat after being colored. By this photochromic property, the polarizer takes out linearly polarized light in being used in an environment of intense ultraviolet light, and on the other hand, the polarizer transmits light in an environment of weak ultraviolet light.