Abstract: An optical film includes a polarizer. The polarizer includes a base layer, and a material of the base layer is obtained by dyeing a base material with a dye. The base material includes a polyvinyl alcohol material, and the dye is selected from blue dichroism organic dyes.

Abstract: The present disclosure discloses an air moisture collection device and method. The air moisture collection device comprises a shell, a condensing device, a water outlet pipe and a base, wherein the bottom of the shell is connected with the top of the base, an inner container is arranged in the shell, a water collecting bottle is arranged in the base, the bottom of the inner container communicates with the water collecting bottle through the water outlet pipe, and the water outlet pipe is provided with a water outlet pipe sealing valve; the condensing device is arranged between the shell and the inner container; an air inlet pipe, an exhaust pipe, a control device and an energy device are arranged on the side wall of the shell; and the control device and the energy device are both connected with the condensing device.