Schott Ag

Guenther Kron

Ulrich Peuchert

Uwe Kolberg

Joseph S Hayden

Yvonne Menke

Carsten Weinhold

Magdalena Winkler-Trudewig

Monika Gierke

Yoshio Okano

Axel Curdt

Doris Ehrt

A core glass and a fiber-optic light guide made from it and a cladding glass are described. The core glass is in the alkali-zinc-silicate system and contains, in Mol % on an oxide basis: 54.5-65, SiO; 18.5-30, ZnO; 8-20, &#x3a3; alkali metal oxides; 0.5-3, LaO; 2-5, ZrO; 0.02-5, HfO; 2.02-5, &#x3a3; ZrO+HfO; 0.4-6, BaO; 0-6, SrO; 0-2, MgO; 0-2, CaO; 0.4-6, &#x3a3; alkaline earth metal oxides; 0.5-3, LiO, but no more LiO than 25% of the &#x3a3; alkali metal oxides; &#x3e;58.5, &#x3a3; SiO+ZrO+HfO. A molar ratio of NaO/KO is from 1/1.1 to 1/0.3. A molar ratio of ZnO to BaO is greater than 3.5.

Core glass in the alkali-zinc-silicate glass system for an fiber-optic light guide and fiber-optic light guide made with said core glass

The opto-ceramics and optical elements of the present invention are transmissive to visible light and/or to infrared radiation. They consist of a crystal combination in which individual crystallites have a cubic structure of the type YOand are made from InOor a mixture of oxides of the type XOin which X=Y, Lu, Sc, Yb, In, Gd, or La. Also mixtures of XOwith oxides having different stoichiometries, such as zirconium and hafnium oxide, are possible, as long as the cubic structure of the opto-ceramic is maintained. The optical elements prepared from the opto-ceramics are particularly suitable for mapping optics, such as objectives having reduced chromatic aberrations, in particular with approximately apochromatic mapping behavior. The optical elements of the present invention may be used in lens systems in combination with lenses of glass, but also with other ceramic lenses.

[object Object]

Growing community of inventors

Mainz, Germany

Guenther Kron