METHOD FOR PRODUCTION OF DISTRIBUTED REFRACTIVE INDEX-TYPE OPTICAL ELEMENT HAVING ULTRAVIOLET RAY-ABSORBING ABILITY

摘要

Disclosed is a method for producing a distributed refractive index-type optical element which can be optically designed readily, enables to provide a desired optical element in a simple manner, and has an ultraviolet ray-absorbing ability. Specifically disclosed is method for producing a distributed refractive index-type optical element having an ultraviolet ray-absorbing ability, which comprises the steps of: applying a paste comprising at least one compound selected from the group consisting of a lithium compound, a potassium compound, a rubidium compound, a cesium compound, a silver compound, a copper compound and a thallium compound, an organic resin and an organic solvent onto a glass substrate comprising an alkali metal component and an ultraviolet ray-absorbing component as glass constituent components; and heat-treating the resulting substrate at a temperature lower than the softening point of the glass substrate.