METHOD FOR PRODUCTION OF DISTRIBUTED REFRACTIVE INDEX-TYPE OPTICAL ELEMENT HAVING ULTRAVIOLET RAY-ABSORBING ABILITY
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United States of America Patent
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Issued Date -
Mar 18, 2010
app pub date -
Mar 27, 2008
filing date -
Mar 29, 2007
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Abandoned
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Abstract
The present invention provides 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.The present invention provides a method for producing a distributed refractive index-type optical element having an ultraviolet ray-absorbing ability, which comprises of 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.
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