Abstract:
The present invention relates to a glass article for use as an optical waveguide fiber (1), the core (4) of which is doped with a chalcogenide element to significantly increase the refractive index of the core (4). The subject of this invention is novel doped silica core composition wherein a portion of the oxygen in the silica is replaced with either sulfur, selenium or tellurium using plasma enhanced chemical vapor deposition (PECVD). These compositions are designed to have higher refractive indices than silica, low coefficient of expansion, high optical transparency and appropriate viscosity and softening points to make them ideal candidates for use as optical waveguide fibers.
Abstract:
A method for controlling the refractive index achieved using a fluorine dopant gas, wherein CF4 is employed as the dopant gas, and the soot preform (12) is doped using the CF4 for a time and temperature sufficient to result in a decrease in fluorine dopant nearest the surface which is in contact with the CF4 gas. Preform (12) is mounted on handle (11) which is fused to handle (14) and the assembly (20) is heated in a furnace muffle (15). The CF4 flows through furnace muffle (15), as indicated by arrows (17), and preferably contains a diluent gas such as helium. An optional centerflow gas (16) may be flowed through the centerline hole (18) in several embodiments, which consists of helium. The end of the porous preform (12) may optionally include a capillary tube (19) to prevent the muffle gases (17) from entering the preform.
Abstract:
Die Erfindung betrifft ein Verfahren zum Herstellen eines Quarzglaskörpers beinhaltend die Verfahrensschritte i.) Bereitstellen eines Siliziumdioxidgranulats aus einem pyrogen erzeugten Siliziumdioxidpulver, ii.) Bilden einer Glasschmelze aus dem Siliziumdioxidgranulat, iii.) Bilden eines Quarzglaskörpers aus zumindest einem Teil der Glasschmelze, iv.) Zerkleinern des Quarzglaskörpers unter Erhalt einer Quarzglaskörnung, v.) Verarbeiten des Quarzglaskörpers zu einer Vorform und vi.) Bilden eines opaken Quarzglaskörpers aus der Vorform. Die Erfindung betrifft weiterhin einen opaken Quarzglaskörper, der durch dieses Verfahren erhältlich ist. Weiterhin betrifft die Erfindung einen Reaktor und eine Anordnung, die jeweils durch Weiterverarbeiten des opaken Quarzglaskörpers erhältlich sind.
Abstract:
The present disclosure is directed to a doped silica-titania glass, DST glass, consisting essentially of 0.1 wt.% to 5 wt.% halogen, 50 ppm-wt. to 6 wt.% of one or more oxides of Al, Ta and Nb, 3 wt.% to 10 wt.% TiO 2 and the remainder SiO 2 . In an embodiment the halogen content can be in the range of 0.2 wt.% to 3 wt.% along with 50 ppm-wt. to 6 wt.% one or more oxides of Al, Ta and Nb, 3 wt.% to 10 wt.% TiO 2 and the remainder SiO 2 . In an embodiment the DST glass has an OH concentration of less than 100 ppm. In another embodiment the OH concentration is less than 50 ppm. The DST glass has a Active temperature T f of less than 875°C. In an embodiment T f is less than 825°C. In another embodiment T f is less than 775°C.
Abstract:
The application is directed to a product or material or article made of glass where the edge of the glass is protected by the application of a solid pre-formed polymer material that is contained within the thickness of the glass. The protected glass articles have a Figure of Merit in the range of 0.4 to 20, and the edge)s) of the articles have been found to withstand impact velocities of up to 500 mm/sec. The solid pre-formed polymer material that is contained within the thickness of the glass is thus applied to the edge, and it is applied such that it does not protrude into the top and bottom viewable planes, surfaces or faces (the large surface areas) of glass. The solid pre-formed polymer material, the protective material that is contained within the thickness of the glass, may be called herein a "bumper."
Abstract:
To provide an optical component of quartz glass for use in a projection objective for immersion lithography at an operating wavelength below 250 nm, which component is optimized for use with linearly polarized UV laser radiation and particularly with respect to compaction and birefringence induced by anisotropic density change, it is suggested according to the invention that the quartz glass should contain hydroxyl groups in the range of from 1 wtppm to 60 wtppm and chemically bound nitrogen, and that the mean hydrogen content of the quartz glass should be in the range of 5 x 10 15 molecules/cm 3 to 1 x 10 17 molecules/cm 3 .
Abstract translation:为了提供石英玻璃的光学部件,用于在250nm以下的工作波长下用于浸没式光刻的投影物镜,该成分被优化用于线偏振UV激光辐射,特别是关于由各向异性密度变化引起的压实和双折射 根据本发明,建议石英玻璃应含有1wt%至60wtppm的羟基和化学键合的氮,并且石英玻璃的平均氢含量应在5×10 分子/ cm 3至1×10 17分子/ cm 3以上。