Quartz glass qualities that can be used for optics consist of high-purity, synthetically produced, molten quartz material. This type of quartz glass is also known as "fused-silica". The material contains practically only silicon and oxygen (silicon dioxide) and is characterized by a very high purity. Only such quality quartz materials offer this great UV-transmittance of more than 80% already at 185 nm while offering a very low absorption in this spectrum. This high UV-permeability is possible with hardly any other glass.
Also the enormous operating temperature range and the thermal strength of quartz glass is remarkable. It can be used continuously at temperatures of 1000 °C and it is highly resistant to thermal shock. These exceptional properties are resulting from the low coefficient of expansion of quartz glass.
The unique chemical characteristics of this material are outstanding. Quartz glass is extremely resistant to salt solutions, acids and water. The chemical resistance to bases surpasses almost all other glasses.
Due to its purity, quartz glass shows remarkably good electrical properties. It has a very small conductivity and therefore offers a particularly high insulation resistivity. Electrical currents can flow essentially only through moving ionic impurities and such contaminations are marginal in quartz glass. This is an important property for semiconductor and electronic applications.
We produce quartz optics mainly from quartz glass in the form of block glass, the so-called "boules". If required, the raw material can be selected and specified with a view to extremely low inclusions and bubbles. In addition, the index homogeneity grade of this quartz glass can be chosen down to ≤ 0,5 ppm. To fabricate an optic out of a boule, the raw glass is first sawn from the block, then formed into the desired shape, ground and optically polished. In this way, our company manufactures quartz glass windows, substrates, wafers, microscope slides, laser components and other optics on a daily basis.
In addition to the UV-quality materials described above, we also process lower grades of quartz glass used for temperature-resistant sight glasses or UV-lamp covers for example. As the material quality and the DUV-transparency are of secondary concern for such applications, the cheaper natural fused quartz types of materials can usually be used for the fabrication of such components. In contrary to optical fused silica, these glass materials are produced by melting natural quartz instead of high purity synthetical quartz. Hence, they cannot offer such high inner quality. This kind of materials are therefore less suitable for demanding applications. But because they offer similar good thermal properties and they are more economical as the high-end glass described above, these materials are typically used for high temperature viewports, lamp housings, etc. The data sheet of our natural fused quartz glass can be found here.
In order to receive a quote for windows, substrates, glass-slides or other components based on optical grade quartz glass material with individual dimensions, please click on the following button:
Also for optics grade quartz glasses we offer a fabrication within our 48 h Express-Service. The glass thicknesses possible in the scope of the express-service are listed below. All of these quartz glass materials have double side polished surface finishes. You can open a price inquiry form by clicking on a desired glass thickness below. Please, select the express option in the inquiry form in case you want to take advantage of this service at extra cost:
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(Transmittance curve for synthetic quartz glass)
Our company processes quartz glass from all leading raw glass manufacturers (Corning, Heraeus, Tosoh, SCHOTT, Saint Gobain, GE, etc). Detailed specifications, and properties of all optical fused silica and fused quartz glass qualities we process can be requested.
All given details and specifications are mean reference values and are not guaranteed. In addition, please consider the "Notes on technical specifications"
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