GLASS POLARIZER FOR VISIBLE LIGHT

摘要

This invention provides a glass polarizer which can be applied, for example, to projection-type liquid crystal display devices, is produced using a silver halide-containing glass as a starting material, and has excellent transmittance and extinction ratio to light having a visible light range (500 nm to 600 nm). The glass polarizer for visible light is a polarizer produced by heat treating a borosilicate glass to dispersion precipitate silver halide particles, heat stretching the borosilicate glass, and then reducing at least a part of the silver halide particles aligned and elongated in the glass to metallic silver particles. The glass polarizer for visible light is characterized in that the average transmittance (T?% 500 to 600 nm) of a wavelength range of 500 nm to 600 nm in light having a polarization plane orthogonal to the longitudinal direction of the metallic silver particles with a shape anisotropy, which have been uniaxially aligned and dispersed, is not less than 75%, and the extinction ratio in the above wavelength range is not less than 25 dB.