Tydex can process these materials well into 20/10 scr/dig (MIL-0-13830A) and lambda/10 632 nm (TWD and surface accuracy). material optical homogeneity at block diameter:Ġ grade according to DIN58927, MIL-G-174B maximal bubble's diameter per 1kg of the material, mm area with bubbles within 100 cm 3 material volume, mm 2 content of bubbles and inclusions within 100 cm 3 material volume Good, visible transmittance is not degraded significantly by ionizing radiation UV transmission vs wavelength for 10mm-thick sampleĬontinuous high temperature hydrolysis of silicon tetrachloride in hydrogen-oxygen flameįusion of natural quartz crystals in an electrically heated furnace Transmission range where transmission is > 90% of maximum, nm Melted blocks of D570 mm, thickness up to 350 mm It is practically free from bubbles and inclusions.Īt near IR range the nearest analogue of quartz glass Infrasil 302 is KS-4V.īelow is comparative and summarizing table of the properties of these two grades of fused silica. It has no absorption bands from 250 nm wavelength range as well as no OH-absorption at around 2700 nm. UV-IR FS (Infrasil 302) combines excellent physical properties with outstanding optical characteristics from DUV (through VISible) up to middle IR wavelength range and is the preferred material for transmission optics over this wide spectral diapason. Suprasil Standard (Heraeus), Spectrosil A and B (Saint-Gobain), Corning 7940 (Corning), Dynasil 11 (Dynasil). The nearest analogues of quartz glass KU-1 are: It is practically free from bubbles and inclusions. This grade does not express fluorescence as a result of UV excitation and is characterized by optical-radiation stability. It has an intensive OH-absorption band at 2600-2800nm wavelength range. It has no absorption bands within 170-250 nm wavelength interval. UV-FS (KU-1) features high transparency within ultraviolet and visible regions. Tydex produces wide range of optical components from UV-FS and UV-IR FS so please link the following chapters to get more detailed information: The combination of thermal, chemical and UV stability together with high DUV transparency make them an excellent choice for projection masks for photolythography. The dielectric properties and very high electrical receptivity of these materials over a wide range of temperatures together with their low thermal conductivity allow their use as an electrical and thermal insulating material in wide range of environments. These materials are inert to most substances, including virtually all acids, allowing their use in rather severe environments. All this together with excellent transmission in compare with most other glasses make them useful materials for production of superior quality optical windows, lenses, prisms, beam-splitters, beam-combiners, cold/hot mirrors, et cetera, and so on. These materials can routinely withstand temperatures up to 950☌ and due to their very low coefficient of thermal expansion can be rapidly heated and cooled with virtually no risk of breakage due to thermal shock. The very high purity (over 99.9%) ensures minimum contamination in process applications. UV-IR grade of FS (Infrasil 302): manufactured by fusion of natural quartz crystals in an electrically heated furnace.īoth Fused Silica grades are ultra pure, single component glasses with a unique combination of thermal, optical and mechanical properties, which make them the preferred materials for use in a variety of processes and applications where other materials are not suitable. UV grade of synthetic FS (KU-1): produced by continuous high temperature hydrolysis of silicon tetrachloride - SiCl4 in hydrogen-oxygen flame Synthetic Fused Silica is made from a silicon-rich chemical precursor and there are two main grades of the material which are widely utilized for optical manufacturing. This opacity is caused by very small air bubbles trapped within the material. Fused Quartz is normally transparent.įused Silica is produced using high purity silica sand as the feedstock and is normally melted using an electric furnace, resulting in a material that is translucent or opaque. They are manufactured using several different processes.įused Quartz is made by melting of high purity naturally occurring quartz crystals at around 2000☌ using either an electrically heated furnace (electrically fused) or a gas/oxygen-fuelled furnace (flame fused). Download Quartz Glass for Optics Datasheet (PDF, 88 KB)įused Quartz and Fused Silica are types of Quartz Glass containing primarily silica in amorphous form.
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