Patent ID: 9212088
Filing Date: 2015-12-15
Classification: C03C,G02B

Abstract:
1. A method for manufacturing an optical member provided with a porous glass layer on a base member, comprising the steps of: forming an intermediate layer containing at least one of silicon, potassium, and aluminum on the base member; forming a phase-separable glass layer on the intermediate layer; forming a phase-separated glass layer on the base member by heating the intermediate layer and the phase-separable glass layer at a temperature higher than or equal to the glass transition temperature of the phase-separable glass layer; and forming a porous glass layer on the base member by subjecting the phase-separated glass layer to an etching treatment, wherein, in the forming of the phase-separated glass layer, component diffusion between the intermediate layer and the phase-separable glass layer are induced by heating so that a porosity of the porous glass layer increases from a base member side toward a side opposite to the base member side.