A method of fabricating a polarizer comprising in this order: stretching a polarizing film; attaching the polarizing film to a guide film; shaping the stretched polarizing film attached to the guide film to form one or more polarizing layers by using a processing device, the processing device being a cutting tool or a laser; applying an adhesive (114, 116) on the polarizing layer attached to the guide film to cover one or more edges of the polarizing layer; attaching a first protective film (117, 254) on a first surface of the polarizing layer, an area of a surface of the first protective film (117, 254) parallel to the first surface larger than an area of the first surface of the polarizing layer (112, 254); separating the polarizing layer (112, 250) from the guide film; applying further adhesive (115, 116) on the polarizing layer (112, 250) to cover one or more edges of the polarizing layer (112, 250); attaching a second protective film (118, 256) on a second surface of the polarizing layer (112, 250), an area of a surface of the second protective film (118, 256) parallel to the second surface larger than the area of the second surface of the polarizing layer (112, 250); curing the adhesive (114, 115, 116) to secure the first protective film (117, 254) and the second protective film (118, 256) to the polarizing layer (112, 250); and cutting the first and second protective films (117, 118, 254, 256) along a shape of the polarizing layer (112, 250), - wherein the boundaries of the cut protective films (117, 254, 118, 256) extend beyond the boundaries of the polarizing layer, and wherein the adhesive (114, 115, 116) is also provided at the periphery of the polarizing layer to seal a lateral surface of the polarizing layer. stretching a polarizing film; attaching the polarizing film to a guide film; shaping the stretched polarizing film attached to the guide film to form one or more polarizing layers by using a processing device, the processing device being a cutting tool or a laser; applying an adhesive (114, 116) on the polarizing layer attached to the guide film to cover one or more edges of the polarizing layer; attaching a first protective film (117, 254) on a first surface of the polarizing layer, an area of a surface of the first protective film (117, 254) parallel to the first surface larger than an area of the first surface of the polarizing layer (112, 254); separating the polarizing layer (112, 250) from the guide film; applying further adhesive (115, 116) on the polarizing layer (112, 250) to cover one or more edges of the polarizing layer (112, 250); attaching a second protective film (118, 256) on a second surface of the polarizing layer (112, 250), an area of a surface of the second protective film (118, 256) parallel to the second surface larger than the area of the second surface of the polarizing layer (112, 250); curing the adhesive (114, 115, 116) to secure the first protective film (117, 254) and the second protective film (118, 256) to the polarizing layer (112, 250); and cutting the first and second protective films (117, 118, 254, 256) along a shape of the polarizing layer (112, 250), - wherein the boundaries of the cut protective films (117, 254, 118, 256) extend beyond the boundaries of the polarizing layer, and - wherein the boundaries of the cut protective films (117, 254, 118, 256) extend beyond the boundaries of the polarizing layer, and wherein the adhesive (114, 115, 116) is also provided at the periphery of the polarizing layer to seal a lateral surface of the polarizing layer.