Abstract:
A quartz glass lamp vessel 1 or 21 is used in many types of lamps. Sometimes it is expedient to absorb a certain portion of the emission spectrum. In accordance with the prior art this is possible by including rare earth metal oxides in the quartz glass. The solubility of rare earth metal oxides in quartz glass is, however, limited. According to the invention, quartz glass is used which contains an alkali metal oxide and, optionally, an alkaline earth metal oxide, in addition to a rare earth metal oxide. The alkali metal oxide increases the solubility of the rare earth metal oxide, so that rare earth metal oxides can be used in larger concentrations. This results in glasses which have a higher degree of absorption, from which lamp vessels can be produced. Fig. 6 to be included.
Abstract:
PROBLEM TO BE SOLVED: To provide a material which exhibits a permanent spectral hole burning phenomenon and exhibits a hole depth of ≥20% even at room temperature, and to provide an optical device which uses such material and can be read out at a practicable signal-to-noise ratio. SOLUTION: Two pieces of transition element ions are confined into a glass ball of about 1 nanometer in diameter to efficiently give rise to an energy transfer and an electron transfer succeeding thereto. COPYRIGHT: (C)2004,JPO
Abstract:
The invention relates to a glass article, in particular a lamp vessel (116, 1), having a glass composition which contains silicon dioxide (SiO 2 ) as main component and neodymium, aluminium, cerium, barium and boron in oxide form as additives, where the proportion of silicon dioxide in the glass composition is at least 90% by weight, the proportion of neodymium in the glass composition is in the range from 0.06 to 1.40% by weight, the proportion of aluminium in the glass composition is in the range from 0.09 to 1.20% by weight, the proportion of cerium in the glass composition is in the range from 0.06 to 1.30% by weight, the proportion of barium in the glass composition is in the range from 0.006 to 1.30% by weight and the proportion of boron in the glass composition is in the range from 0.0009 to 0.20% by weight.
Abstract:
A quartz glass lamp vessel 1 or 21 is used in many types of lamps. Sometimes it is expedient to absorb a certain portion of the emission spectrum. In accordance with the prior art this is possible by including rare earth metal oxides in the quartz glass. The solubility of rare earth metal oxides in quartz glass is, however, limited. According to the invention, quartz glass is used which contains an alkali metal oxide and, optionally, an alkaline earth metal oxide, in addition to a rare earth metal oxide. The alkali metal oxide increases the solubility of the rare earth metal oxide, so that rare earth metal oxides can be used in larger concentrations. This results in glasses which have a higher degree of absorption, from which lamp vessels can be produced. Fig. 6 to be included.
Abstract:
The invention relates to a glass article, in particular a lamp vessel (116, 1), having a glass composition which contains silicon dioxide (SiO2) as main component and neodymium, aluminium, cerium, barium and boron in oxide form as additives, where the proportion of silicon dioxide in the glass composition is at least 90% by weight, the proportion of neodymium in the glass composition is in the range from 0.06 to 1.40% by weight, the proportion of aluminium in the glass composition is in the range from 0.09 to 1.20% by weight, the proportion of cerium in the glass composition is in the range from 0.06 to 1.30% by weight, the proportion of barium in the glass composition is in the range from 0.006 to 1.30% by weight and the proportion of boron in the glass composition is in the range from 0.0009 to 0.20% by weight.