Optical: systems and elements – Lens – With graded refractive index
Reexamination Certificate
2005-02-15
2009-08-11
Lester, Evelyn A. (Department: 2873)
Optical: systems and elements
Lens
With graded refractive index
C359S653000, C359S654000, C359S655000, C065S030130, C065S057000
Reexamination Certificate
active
07573645
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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Einishi Toshihiko
Kadono Kohei
Kaga Naoko
Kominami Norimasa
Ohtani Takeshi
Isuzu Glass Co., Ltd.
Lester Evelyn A.
National Institute of Advanced Industrial Science and Technology
Posz Law Group , PLC
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