Method for manufacturing optical element of refractive index distribution type
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United States of America Patent
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Aug 11, 2009
Grant Date -
Aug 28, 2008
app pub date -
Feb 15, 2005
filing date -
Feb 20, 2004
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Abstract
The present invention provides a method of producing a graded refractive index optical element, the method being capable of easily forming a graded refractive index distribution in a desired portion of a glass substrate without the need for a specific treatment atmosphere, and without using a molten salt. More specifically, the present invention provides a method of producing a graded refractive index optical element comprising applying a paste containing a copper compound, an organic resin and an organic solvent to a glass substrate containing an alkali metal component as a glass component, and then performing heat treatment at a temperature below the softening temperature of the glass substrate.
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