초록 ▼

A method which enables an optical element having a large refractive index difference and a stabilized refractive index distribution to be produced in a short time. When a gel prepared by a sol-gel method is immersed in a solution containing at least one substance selected from the group consisting o

A method which enables an optical element having a large refractive index difference and a stabilized refractive index distribution to be produced in a short time. When a gel prepared by a sol-gel method is immersed in a solution containing at least one substance selected from the group consisting of an organic solvent, water, an acid, and an alkali, or in a solution having a metal salt dissolved in the at least one substance selected from the above group, a component eluted into the solution from the gel and/or a foreign substance which is produced or mixed in the solution during the solution immersing step is removed, and a component diffused into the gel from the solution is supplemented to the solution.

대표청구항 ▼

[ What is claimed is:] [1.] A method of making a glass material, said method comprising the steps of:providing a wet gel prepared from a sol;immersing the wet gel in a solution containing at least one substance selected from the group consisting of an organic solvent, water, an acid, and an alkali,

[ What is claimed is:] [1.] A method of making a glass material, said method comprising the steps of:providing a wet gel prepared from a sol;immersing the wet gel in a solution containing at least one substance selected from the group consisting of an organic solvent, water, an acid, and an alkali, or in a solution having a metal salt dissolved in the at least one substance selected from the group, and eluting at least one component into the solution from the gel while removing the at least one component eluted into the solution from the gel and/or any foreign substance which is produced or mixed in the solution during said step of eluting, said step of removing the at least one component eluted into the solution being conducted so that the eluted component does not impair a rate of elution of the at least one component; anddrying and sintering the gel having undergone said steps of immersing and eluting to thereby obtain a glass material,wherein the at least one component eluted into the solution from the gel is removed by a trapping member.