Patent ID: 6765721
Filing Date: 2004-07-20
Classification: G02B

Abstract:
A method for manufacturing a polarization element including a transparent substrate, the method comprising the steps of:forming a fine metal particle dispersed product containing a plurality of dispersed fine metal particles on a surface of the transparent substrate using a sol-gel method; drawing the fine metal particle dispersed product together with the transparent substrate with heating to produce a drawn fine metal particle dispersed product and transparent substrate; and cutting the drawn fine metal particle dispersed product and transparent substrate to produce the polarization element; wherein the step of forming a fine metal particle dispersed product includes the steps of: coating a sol coating liquid, containing a disperse liquid containing an organic silicon compound as a main component and a salt of a first metal dispersed in the disperse liquid for generating the fine metal particles, on the surface of the transparent substrate; treating with heating the sol coating liquid coated on the transparent substrate; and sintering the heat treated sol coating liquid coated on the transparent substrate, wherein the sol coating liquid further contains a metal compound of a second metal different from the first metal.