fused silica transmission
UV lasers based on ArF and XrF lasing materials have laser wavelengths of 193nm and 248nm, respectively. Due to its excellent UV transmission fused silica is the material of choice for optical components such as mirrors and lenses in UV laser cavities. Phase masks) or as dispersion elements for wavelength separation. Fused silica, 20 °C. Less known is the fact that Fused Silica has excellent elastic properties, making it a superior material for manufacturing micro-mechanical pieces that must flex to provide some type of motion. To limit thermal gradients when heating viewports, we recommend the viewing area and the flange be covered with many layers of aluminum foil to act as a reflective shield. Fused Silica is an entirely synthetic material, and is technically the purest glass. The data is uncorrected for surface reflection (Fresnel) losses.The absorption boundary on the ultraviolet side is deep in the UV. Fused Silica is the glassy form of Quartz and is thus isotropic.
Special precautions must be taken at all stages of the manufacturing process to maintain high purity.The most common impurities are metals (Al, Na and Fe among others), water (present as OH groups), and chlorine. In this paper, a double-pulse femtosecond laser was used to control the surface ablation threshold of fused silica. Determination of refractive index of silica glass for infrared wavelengths by IR spectroscopy, J. Non-Cryst. Make sure the "glass" chosen has a reasonable transmission at the wavelengths of interest.For safety, we strongly recommend that no viewport is exposed to a temperature ramp of greater than 2-3°C per minute, and that no viewport be exposed to direct thermal radiation. Purity is mostly determined by the raw material, the manufacturing method and subsequent handling procedures. VacuCAD is a free library containing thousands of 2D CAD drawings (in DXF format) and 3D Models (in STP format) for many of our standard vacuum components and chambers.
UV-grade fused silica is well-suited for applications that benefit from increased transmission deeper into the UV than N-BK7. For a guide on Viewport Cleaning Procedures, please All viewports are fragile and should be handled and mounted with extreme caution. The data is uncorrected for surface reflection (Fresnel) losses.The refractive indices of the glasses are not only dependent on wavelength, but also upon temperature. Synthetic Fused Silica. By comparison, steel has a Young's Modulus of the order of 205 GPa.Fused Silica is extremely strong in compression, with a design compressive strength greater than 1.1 x 10To date, the common practice has been to use a design tensile strength for Fused Silica with 'good' surface quality, taking into consideration both safety margin and fatigue, of 5 x 10 Fused Silica is transparent in the ultraviolet, visible, and near infrared. Diffraction gratings are used either as beam splitting elements (e.g. Shown here is a typical transmission for a 10-mm thick synthetic Fused Silica sample. This glass is composed exclusively of high-purity silica (SiOContaminants, despite their presence at very low levels, have subtle yet significant effects. It is compatible with the vast majority of chemicals used in the industry and in the laboratory.
UV fused silica also offers a lower index of refraction for a given wavelength, better homogeneity, and a lower coefficient of thermal expansion than N-BK7. CF Flanged Quartz (Fused Silica) Laser Transmission Viewports Features: Built from the highest-quality materials to UHV standards; Compatible with vacuum systems capable of reaching UHV levels; Optic and coating tailored to common laser wavelengths; Viewports may be sealed with fully annealed copper gaskets to reduce induced strain Its density is 2.202g/cmFused Silica shows an almost perfect brittle-elastic behavior at temperatures lower than the transformation point. These processes create microscopic cracks, which lower the tensile strength of the glass and make it break easily.
Its thermal conductivity is only 1.38W/mºK (measured at 25ºC), which is one of the lowest for any solid. When using standard fabrication processes, such as ultrasonic drilling, lapping, or sand-blasting, this is indeed true. They are extensively used in semiconductor fabrication, lithography, and eye surgery. We offer many different grades of fused silica to support various product applications. On the infrared side, the source of intrinsic absorption is molecular vibration. Fused Silica is tough and hard and has a very low expansion.
Fused Silica is transparent in the ultraviolet, visible, and near infrared.Shown here is a typical transmission for a 10-mm thick synthetic Fused Silica sample. Solids 223, 158-163 (1998) The exact location of the absorption edge is strongly affected by the presence of impurities. Translume works with Fused Silica (also called fused quartz).
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