Fabrication process of a gradient index type of optical element

Details Fabrication process of a gradient index type of optical element Fabrication process of a gradient index type of optical element

1999-06-02

2000-03-07

Silverman, Stanley S.

Glass manufacturing

Processes

Sol-gel or liquid phase route utilized

65 301, 65 3013, 65 31, 65 6052, C03B 800, C03C 1500, C03C 2100, C03C 1700

Patent

active

060324872

ABSTRACT:
The invention provides a process of obtaining a gradient index type of optical element with profiles of first and second metal component concentrations by the sol-gel method. The process of fabricating a gradient index type of optical element comprises steps of dipping a silicon component-containing wet gel prepared by the sol-gel method in a solution containing an alkoxide of at least one metal component selected from a first group consisting of Ti, Nb, Ta, and Zr or a derivative thereof to thereby impart to the wet gel a concentration gradient with a concentration of the first metal component decreasing from a periphery to a center of the wet gel, allowing at least one metal component selected from a second group consisting of Ba, La, Y, Gd, Sr, Ca, and Zn to be dissolved out of the wet gel to thereby impart to the wet gel a concentration gradient with a concentration of the second metal component increasing from the periphery to the center of the wet gel, and drying, and firing the wet gel.

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patent: 5308802 (1994-05-01), Haun
patent: 5356840 (1994-10-01), Noda
patent: 5439495 (1995-08-01), Koike et al.

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