Invention Grant
US08703295B2 Glass material for mold pressing, method for manufacturing same, and method for manufacturing optical glass element 失效
用于模压的玻璃材料,其制造方法以及制造光学玻璃元件的方法

Glass material for mold pressing, method for manufacturing same, and method for manufacturing optical glass element
Abstract:
A glass material for mold pressing, comprised of a core portion and a covering portion. In one embodiment, the core portion comprises a multicomponent optical glass containing at least one readily reducible component selected from among W, Ti, Bi, and Nb and the covering portion comprises a multicomponent glass containing none or a lower quantity of the readily reducible component than is contained in the core portion. In another embodiment, the core portion comprises a fluorine-containing multicomponent optical glass, and the covering portion comprises a multicomponent glass containing none or a lower quantity of fluorine than is contained in the core portion. A method for manufacturing an optical glass element employing the above glass material that comprises heat softening a glass material that has been preformed into a prescribed shape, and conducting press molding with a pressing mold.
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