Abstract: The present invention relates to a process for producing optical elements, in particular lenses made from an optoceramic, comprising a forming step, which step comprises the formation of a green body. The invention further relates to optical elements produced according to the before mentioned process. The process according to the present invention comprises a forming step including the application of a mould being close to the final geometry of the body to be formed (near net shape principle) including the application of moderate pressure between 0.1 MPa and 50 MPa, preferably between about 0.5 MPa and 25 MPa, in particular preferred between about 1 MPa und 12 MPa. The pressure is applied either on the ceramic powder mass during positioning of the ceramic powder mass into the form or is applied onto the ceramic powder mass within the form.

Abstract: The invention relates to a use of glass compositions having an antimicrobial and/or disinfectant effect in materials used for restoring teeth, excluding implants.

Abstract: The refractive, transmissive or diffractive optical elements are made from a ceramic containing one or more oxides of the type X2O3, which is transmissive for visible light and/or for infrared radiation and which has a cubic crystal structure analogous to that of Y2O3. In preferred embodiments X is Y, Sc, In, or a lanthanide element, namely La to Lu, and in particular is Lu, Yb, Gd, or La. Also mixtures of oxides of the type X2O3 with oxides having different stoichiometries, such as HfO2 and/or ZrO2, may be present, as long as the cubic structure of the ceramic is maintained.

Abstract: The invention relates to a water-insoluble silicate glass powder, wherein the silicate glass powder exhibits glass particles with the following composition in percentage by weight on an oxide basis: SiO2 20-80 Na2O ?5-30 K2O 0-5 P2O5 ?0-15 B2O3 ?0-10 CaO ?4-30 MgO 0-8 Al2O3 0-7 Fe2O3 0-2 as well as conventional fining agents in conventional quantities. The invention is characterized in that the glass particles contain at least one of the following components ZnO AgO CuO CeO2 GeO2 TeO2 wherein these components are concentrated in the regions of the glass particles that are near the surface.

Abstract: The invention relates to glass powder, especially a biologically active glass powder, which includes a plurality of glass particles and which is characterized by the following features: the glass particles are made up by >90 % of non-spherical particles; the geometry of the individual non-spherical particle is characterized by a ratio of length to diameter of 1.1 to 105.

Abstract: A glass powder or a glass-ceramic powder is provided that includes multicomponent glasses with at least three elements, where the glass powder or a glass-ceramic powder has a mean particle size of less than 1 ?m. In some embodiments, the mean particle size is less than 0.1 ?m, while in other embodiments the mean particle size is less than 10 nm.

Abstract: The optical elements are made from an opto-ceramic material that is characterized by high density, transparency for visible light and IR, high refractive index, high Abbe number and outstanding relative partial dispersion. Mixed oxides are sintered to obtain the opto-ceramic material. The mixed oxides contain zirconium oxide and hafnium oxide mixed with one or more oxides of yttrium, scandium, lanthanide elements, and optionally mixed with one or more of SiO2, Na2O, and TiO2. Alternatively the mixed oxides contain zirconium oxide and hafnium oxide mixed with CaO and/or MgO and optionally mixed with one or more of SiO2, Na2O, and TiO2. In addition, the mixed oxides can also include one or more oxides of Al, Ga, In, and Sc; optionally one or more oxides of yttrium, some lanthanide elements; and optionally one or more of SiO2, Na2O, MgO, CaO, and TiO2.

Abstract: A resonant enhanced photosensitive material includes a trap center that is adapted to interact with light and enhances the photosensitivity of the material based on a resonant interaction process with photons. The invention provides enhanced photosensitivity materials and, especially a method for enhancing photosensitivity in glasses, glass ceramics and ceramics.

Abstract: A composite structure (10) is defined, consisting of components made of a zero-expansion material, in particular of a glass ceramic such as Zerodur®, which are joined together by at least one adhesive layer (17, 19, 26, 28, 30, 32). The composite structure (10) has the advantageous properties associated with zero-expansion materials, in particular a very low coefficient of thermal expansion, strength up to 150° C. and minimal outgassing.

Abstract: The invention relates to a photostructurable body, in particular glass or glass-ceramic, in which the glass is a multicomponent glass and/or the glass-ceramic is a multicomponent glass-ceramic, in each case having a positive change in refractive index ?n as a result of the action of light.

Abstract: The application relates to an article having a antimicrobial surface with a metal ion concentration, especially a Ag-concentration in a depth of about 0 um to about 2 um of the article measured from the surface higher than 0,6 wt %, preferably 0,8 weight-%, most preferably 1 weight-%.

Abstract: The method of protecting a polymeric plastic from attack by bacteria and fungi includes providing bioactive glass particles having a mean particles size preferably less than 2 ?m as an additive incorporated into the polymeric plastic. The bioactive glass particles contain 40 to 60% by weight of SiO2, 10 to 30% by weight of CaO, 10 to 35% by weight of Na2O, 2 to 8 % by weight of P2O5, 0 to 25% by weight of CaF2, 0 to 10% by weight of B2O3, 0 to 8% by weight of K2O and/or 0 to 5% by weight of MgO. The additive is included in amounts of up to 25% by weight in the polymeric plastic.

Abstract: The optical elements are made from an opto-ceramic material that is characterized by high density, transparency for visible light and IR, high refractive index, high Abbe number and outstanding relative partial dispersion. Mixed oxides are sintered to obtain the opto-ceramic material. The mixed oxides contain zirconium oxide and hafnium oxide mixed with one or more oxides of yttrium, scandium, lanthanide elements, and optionally mixed with one or more of SiO2, Na2O, and TiO2. Alternatively the mixed oxides contain zirconium oxide and hafnium oxide mixed with CaO and/or MgO and optionally mixed with one or more of SiO2, Na2O, and TiO2. In addition, the mixed oxides can also include one or more oxides of Al, Ga, In, and Sc; optionally one or more oxides of yttrium, some lanthanide elements; and optionally one or more of SiO2, Na2O, MgO, CaO, and TiO2.

Abstract: The invention relates to a use of glass compositions having an antimicrobial and/or disinfectant effect in materials used for restoring teeth, excluding implants.

Abstract: The invention relates to an optical hybrid lens. According to the invention, the lens consists of a substrate (1) that consists of a ceramic having a predetermined shape and at least another material (2), which covers a surface of the substrate (1) at least in certain sections in order to form a lens surface. Use of an optical ceramic as a material enables an additional degree of freedom for adjusting the imaging properties of the hybrid lens. The optical ceramic may have a high refractive index and a low dispersion. The other material can be a material that can be deformed or recast at temperatures that are low in comparison to those of the optical ceramic. In particular the other material can be a low-TG glass or a polymer. The other material is directly applied onto the substrate without a further surface finishing being necessarily required. Other aspects of the invention relate to an optical lens group, an optical image acquisition device, and a process for manufacturing a hybrid lens.

Abstract: The invention relates to an antimicrobial silicate glass with the following weight composition in wt. % based on oxides: SiO2 20 to 70, Na2O 5 to 30, K2O 0 to 5, P2O5 1 to 15, B2O3 0 to 10, CaO 4 to 30, AgO 0 to 2, ZnO 0 to 8, CuO 0 to 5, MgO 0 to 8, Al2O3 0 to 7, CeO2 0 to 5, Fe2O3 0 to 2 whereby the sum of the components AgO, CuO, CeO2 is >10 ppm, preferably ?100 ppm and <8 wt. %.

Abstract: The invention relates to an antimicrobial, anti-inflammatory and disinfecting glass, whereby the glass comprises: 30–95 wt. % SiO2,0–40 wt. % Na 2O, 0–40 wt. % K2O, 0–40 wt. % Li2O, 0–35 wt. % CaO, 0–10 wt. % MgO, 0–10 wt. % Al2O3, 0–15 wt. % P2O5 wt. % B2O3?, 0–10 wt. % NaF, 0–10 wt. % LiF, 0–10 wt. % KF, 0–10 wt. % CaF2, 0–5 wt. % Ag2O, 0–10 wt. % MgF2,0–2 wt. % Fe2O3and 0–10 wt. % XJy, where X?Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Ag or Zn and y=1 or y=2 and the sum of XJy> is 10 ppm.

Abstract: The invention relates to a glass ceramic, wherein the initial glass comprises 30–65 percent (by weight) SiO2; 5–30 percent (by weight) Na2O; 5–30 percent (by weight) CaO, and 0-15 percent (by weight) P2O5, and wherein the main crystalline phases comprise alkali—alkaline earth—silicate and/or alkali silicate and/or alkaline earth silicate. The invention is characterized in that either a glass ceramic with a single crystalline phase 1 Na2O—2CaO—3 SiO2 is excluded, or the crystalline size of the glass ceramic is <10 ?m, or the weight fraction of SiO2 is <47%.

Abstract: In order to more simply and cost-effectively produce optical components or systems having at least two optical elements, preferably at least one diffractive element and a further refractive and/or diffractive element, and preferably to improve the optical properties of such components and systems, the invention relates to an optical component having a diffractive and/or refractive element which comprises a photosensitive glass and/or a photosensitive glass ceramic, which have structures influencing the light propagation at least in a part of their volume. The invention also relates to a method for producing such an optical component.

Abstract: The invention relates to an antimicrobial phosphate glass having the following composition in percent by weight on an oxide basis: P2O5>66-80 percent by weight; SO30-40 percent by weight; B203 0-1 percent by weight; Al2O3>6.2-10 percent by weight; SiO2 0-10 percent by weight; Na2O>9-20 percent by weight; CaO 0-25 percent by weight; MgO 0-15 percent by weight; SrO 0-15 percent by weight; BaO 0-15 percent by weight; ZnO>0-25 percent by weight; Ag2O 0-5 percent by weight; CuO 0-10 percent by weight; GeO2 0-10 percent by weight; TeO2 0-15 percent by weight; Cr2O3 0-10 percent by weight; J 0-10 percent by weight; F 0-3 percent by weight.