Method of manufacturing gradient index optical elements

Details Method of manufacturing gradient index optical elements Method of manufacturing gradient index optical elements

1992-02-18

1993-09-14

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 53, 65 3013, 65 181, C03C 400

Patent

active

052448444

ABSTRACT:
A method of manufacturing a gradient index optical element comprises preparing a sol using silicon alkoxide and an aqueous metal salt solution as a source of index-modifying cations. The sol is treated to obtain a wet gel. Metal salt from the wet gel is eluted by immersing the wet gel in a solvent to produce a concentration gradiation of the metal salt in the wet gel. The metal salt is fixed in the wet gel by immersing the wet gel in a solvent. The steps of eluting and fixing are repeated so that a gradient index optical element is produced having a large difference in refractive index between the outer periphery portion and the center of the gel.

REFERENCES:
patent: 4686195 (1987-08-01), Yamane
patent: 4797376 (1989-01-01), Caldwell et al.
patent: 4902650 (1990-02-01), Caldwell et al.
patent: 5068208 (1991-11-01), Haun et al.
patent: 5069700 (1991-12-01), Yamane et al.

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