Uvfs is readily available, affordable and relatively easy to fabricate compared to fluorides. They are even available in large bulk forms unlike some ceramic materials. It is transparent over a wide spectral range and it has a low coefficient of thermal expansion. Quartz glass used for optics is made of high purity synthetic quartz. Fused silica is available in uv and ir grades for different applications.
Knight opticals stock range of uv fused silica windows are made from corning 7980 grade 2g or equivilent of spectrosil b. Its tight index tolerance ensures highly predictable lens specifications. Our fused silica is over 99% amorphous and has an extremely low coefficient of thermal expansion and high resistance to thermal shock. This grade of quartz glass is known as fused silica. To obtain the index for opticalquality synthetic fused. It has no absorption bands within 170250 nm wavelength interval.
Fused silica corning 7940 wafer material has been discontinued by corning and was replaced by hpfs high purity fused silica 7980, which is an ideal material for uv grade fused silica wafers. There is a limit to the maximum fluorine content, because fluorine also etches away fused silica. For more than 50 years, leco has provided topquality ceramic products to industries worldwide, such as technical ceramics, powdered metal pm, metal injection molders mim, and foundry and investment casting. Fused silica can operate down to 190 nm and all through the visible. Refractive index of fused silica fused quartz malitson. Interspecimen comparison of the refractive index of fused silica, j. Uses range from substrates to high powered laser systems. Abrisa technologies currently offers two products in this glass category. High precision fused silica windows feature lasergrade surface quality up to sd 2010 and parallelism up to 5 arc sec.
Hpfs fused silica arf grade hpfs arf grade, corning code 7980, is a high purity synthetic amorphous silicon dioxide manufactured by flame hydrolysis. Round windows can be purchased from stock uncoated 185 nm 2. Fused silica quartz optical glass ohara corporation. Quality grade selection chart attribute fused silica 7980 standard grade 7980 krf grade 7980 arf grade 7980 mirror grade 7980 industrial grade 7979 ir grade 8655 arf grade visible transmittance uv transmittance infrared transmittance homogeneity certified in useaxis aa, a, c, f by size. These uv grade fused silica planoconvex lenses, which are available in sizes ranging from o5 mm to o75 mm, have a uv antireflection coating for the 245 400 nm range deposited on both surfaces. Uv grade fused silica light pipeoptical rod, o 2 mm, length 100 mm del mar photonics featured optical components del mar photonics continuously expands its optical components portfolio. All lenses are pitch polished for precicision surface quality and accuracy. Uv grade fused silica offers high transmission in the deep uv and exhibits. These uncoated uv grade fused silica planoconvex lenses are available in sizes ranging from o2 mm to o75 mm. Glass codes 7980, 7979, and 8655 are high purity noncrystalline silica glasses with excellent optical qualities.
Duv uv, vis and ir applications lithosil synthetic fused silica. Uv fused silica is an excelent optical material which features of high homogeneity, good mechanical properties and better thermal stability than bk7 glass, usfull transmission from 185nm to 2100nm. Products windows uv fused silica window uv fused silica window. From basic flanges, feedthroughs, viewports and valves, to a complete range of fully controlled manipulation or deposition systems or. The rugged construction of the fused silica viewports allows repeated bakeout with uhv performance, whilst the window offers broadband optical transmission through deep uv, visible to near infrared. Engineered for use in investment casting foundries, 3m fused silica products include flours, blends and advanced shell systems to help meet these exacting requirements and create parts that fit the mold every time. Materials data fused silica fused quartz esco optics. For uv applications lower than 193nm, vuv caf2 is the next best choice.
We have an extensive stock of fused silica and fused quartz. Pure silica rods for specialty fiber applications heraeus has long produced fused silica materials with optimized optical properties for a broad range of specialty fiber applications. Our stock range of quality grade uv grade fused silica lenses are available uncoated or ar coated for ultraviolet applications from 248400nm although the lens can work down at 185nm through to nir applications at 2000nm. Its highly cross linked three dimensional structure gives rise to its high use temperature and low thermal expansion coefficient. For elements with high requirements for transmittance within 1902600 nm range elan offers the usage of russian equivalent to corning 7980 or schott lithosil q2.
This results in an amorphous silica finished product that. It has an intensive ohabsorption band at 26002800nm wavelength range. Our quartz windows are available in vitreosil or equivalent materials such as jgs2 and perform efficiently at 260nm in the uv to 2500nm. Product characteristics include extraordinary low refractive index variations leading to stateoftheart homogeneity values, lowest. Ohara also supplies natural quartz made from highpurity crystals. These properties make fused silica an excellent choice for. Because of the high temperature of the plasma, this process is best suited to produce fluorine doped fused silica.
Fused silica viewports are offered in cf flange styles. It is very popular due to cheap production, as it is made from sand, very good thermal dimensional stability, and its durability. Thorlabs uv fused silica highprecision windows are available in four sizes ranging from o12 to o2 and a rectangular 25 mm x 26 mm size. Fused silica is a noncrystalline glass form of silicon dioxide quartz, sand. In addition, these windows will limit the transmitted wavefront distortion to.
Silica fused silica thermal and refractory ceramics. Uv fused silica windows feature low distortion, excellent parallelism, low bulk scattering, and fine surface quality. Only such unique quartz glass qualities can offer this high constant transmission for uv light of greater. Uv fused silica windows are pieces of flat transparent optical material that allow light into an optical instrument. Please call or email for details pricing and availability may be subject to change. Sep 28, 2011 exposure to fused silica has long been known to cause the fibrogenic lung disease, silicosis. Celebrating more than 53 years of excellence from 1967. Fused silica is offered in many different grades to support various product applications. Uv fused silica windows corning 7980 grade 2g spectrosil 2000. Insulation parts used widely in furnaces for solar and pdp plasma display panel, lcd liquid crystal display industries. Zemax provides download links to older versions and technical support for those versions for a limited time. Solids 223, 158163 1998 sellmeier formula is reported in ref. Synthetic fused silica is made from a siliconrich chemical precursor and there are two main grades of the material which are widely utilized for optical manufacturing. Our revolutionary furnace design and process helps prevent the fused silica product from becoming contaminated with nonsilica and crystallinesilica phase materials.
Fused quartz, zcut quartz, ir and excimer and other grade materials as well as custom sizes are available. Hpfs fused silica krf grade hpfs krf grade, corning code 7980, is a high purity synthetic amorphous silicon dioxide manufactured by flame hydrolysis. Fused silica and fused quartz are types of glass substrates that have high working and melting temperatures. While the following policies dont represent a historical change, our goal is to clearly define end of life support to assist customers in planning for the future. Making them ideal for spectroscopic instruments in the uv. The following policies govern technical support for and availability of. Fused silica wafers jgs1, jgs2, jgs3 grades refreactive index. Fused silica imerys refractory minerals the global.
The basic raw materials for these products are silica glass also called quartz, and glassy set sio. Fused silica has a high use temperature and a thermal expansion coefficient of nearly zero, both of which are a result of the highly crosslinked threedimensional structure. The crystalclear amorphous silicon dioxide material contains only silicon and oxygen and has nearzero impurities. Uv fused silica windows are precision manufactured using uvgrade synthetic fused silica. The fsnd uv fused silica metallic neutral density filter set includes eight, 50. While fused silica refractories do not have the high operating temperatures as alumina refractories, it does provide superior thermal shock resistance in both kiln furniture and molten metal applications. The frnd uv fused silica metallic neutral density filter set includes eight, 25.
Uv grade fused silica light pipesoptical rods request a quote common specifications material. Our fused silica wafers is a a high purity synthetic amorphous silicon dioxide. These features ensure this material is the best material for use in our fused silica rollers which are typically used in the following applications. Grades with low oh typically less than 10ppm are available and they can be used effectively to 3. The ultra high vacuum uhv cf versions are offered using high grade 304l stainless steel flanges.
From gas turbines to golf clubs, highprecision metal parts require accuracy and consistency at every stage of the manufacturing process. High purity fused silica hpfs fused silica corning. Below are just a small expample of the fused silica wafers that we have in stock. Fused silica uv grade sio2 fused silica is often used in near infrared systems performing in the 0. Fused silica is nearly 100% pure silicon dioxide which is fused at high temperatures into an amorphous material. Uv grade fused silica, spectrosil 2000 2g for 1702500nm transmission opmuspec2000 0 10 20 30 40 50 60 70 80 90 100. In addition, these windows will limit flatness to 110 fused silica windows available uncoated, or with antireflection coatings optimized for uv, visible or ir spectrum. Other features besides its purity include excellent thermal properties and high resistance to chemicals. Fused silica is a noncrystalline glass form of silicon dioxide quartz, sand which lacks long range order in its atomic structure. Knight optical also offers custom biconvex lenses to meet your requirements or alternatively edge stock lenses for a quick.
We can supply all quality levels from industrial grade to high grade homogeneity, bubble free grades including 2directional and 3directional, and excimer grades. Vaqtec is an italianbased manufacturer and distributor of competitively priced quality products for use in high and ultra high vacuum environments. Both hydrous and anhydrous low oh content quartz with. Ge 124 is very similar to fused silica, with the exception of less transmission in the uv spectrum and much lower oh content. Cylindrical lenses, s1uv grade fused silica esco optics. Both fused silica glass and borosilicate glass have excellent thermal and chemical stability, and they are also lower in cost for both material and machining compared to ceramic materials. Fused silica is inert, has excellent chemical stability, and has extremely low electrical conductivity. Heraeus has mastered the manufacturing of fused silica base materials for uv, vis, and nir spectroscopy applications.
Fused silica is made from high purity silica, using unique fusion technology to ensure the highest quality. Available uncoated, or with antireflection coatings optimized for the uv or visible spectrum. Esco has the capability to manufacture a variety of custom elements, including negative cylindrical lenses and lenses made of other optical materials. Uv grade fused silica offers high transmission in the deep uv and exhibits virtually no laserinduced fluorescence as measured at 193 nm, making it an ideal ch. Ross optical has an inventory of over 800 sets of optical test plates that allows us to design, manufacture and deliver complete sets of optical components in a short period of time. However, despite this shortcoming, fused quartz still offers superior thermal shock and chemical resistance, as well as, high transmission from 270nm to 2. Fused quartz is normally transparent while fused silica is translucent or opaque. The viewports comprise of high purity laser quality fused silica opticf with precise flatness, parallelism, scratch and dig specifications. Due to the materials inherently hard sio2 amorphous structure, the material is not diamond turnable. Shaping of the fused silica products is achieved by pressing or slip casting in the presence of chemical binders.
Uv grade fused silica or bk7 light pipes custom manufactured straight rectangular or tapered uv grade fused silica or bk7 light pipes are now available from valley design. Uv grade fused silica lenses in stock del mar photonics. Fused silica uv grade sio2 material ultiquest technology. Typical of glasses, it lacks long range order in its atomic structure. These uncoated uvgrade fused silica planoconvex lenses are available in sizes ranging from o2 mm to o75 mm. Fused silica is high purity quartz sand that has been melted to form glass. However, despite this shortcoming, fused quartz still offers superior thermal shock and chemical resistance, as. Silica or fumed silica is a common filler for epoxy. Uv grade fused silica bk7 glass and other materials are also available. Uv grade fused silica offers high transmission in the deep uv and exhibits virtually no laserinduced fluorescence as measured at 193 nm, making it an ideal.
This glass has superior transmission in both the uv and ir spectra, a very low dielectric coefficient and excellent properties where flourescence or solarization are an issue. Determination of refractive index of silica glass for infrared wavelengths by ir spectroscopy, j. Truefreeform in opticstudio enables a unique nonparameterized optimization methodology for optical design. The achievable maximum content of fluorine in silica is a function of deposition temperature. Fused quartz is prone to phosphorescence and solarisation purplish discoloration under intense uv illumination, as is often seen in flashtubes. Uv fused silica ku1 has high transparency within ultraviolet and visible regions. Fused silica is the glassy form of quartz and is thus isotropic. In this article, we demonstrate gridbased sag optimization of the truefreeform surface in designing a wedge prism for arvr applications, greatly improving imaging quality for. Uv grade fused silica windows have excellent uv transmission working efficiently at 175nm. The material has high homogeneity and good transmission in the visible and near infrared spectral regions. Among the uv transmitting substrates, uv grade fused silica uvfs is the most widely used, and excimer grade fs is used for applications down to 193nm. Fused silica uv gradesio2 specifications are available optical refractive index at n e 1. The curve above shows the typical optical transmission of our uv grade quartz glass at 10,0 mm glass thickness for wavelengths from 160 5000 nm.
Quartz glass synthetic fused silica with optical quality. Fumed silica also known as colloidal silica is a filler often used in epoxy. Fused silica zero length viewports from vac techniche. It is made by melting high purity silica sands and has uses in refractories, investment casting, radar windows etc. Both fused quartz and uv grade fused silica are suitable materials for use in ultraviolet applications. Homogeneity for optical fused silica 5 x 106 transmission at 10mm thick. However the most common fused silica for infrared use is quite a bit more expensive than silicon and slightly less expensive than calcium fluoride or zns multispectral grade. Available for immediate delivery fused silica currently in stock. Fused silica normally contains oh which causes a strong absorption centred on 2. Fused silica uv gradesio2 specifications are available. Our fused silica wafers are hpfs high purity fused silica 7980, uv grade fused silica wafers. Our fused silica wafers ahve a very low thermal expansion coefficient, very good homogeneity including excellent optical properties and exceptional transmittance in the.
Even it is called uvfs normally it is the standard substrate material for a use in uv, vis and nir. If youve ever though about building a boat or have actually built one using epoxy, you have most likely run across fumed silica, and wondered what it is and what its characteristics are. Due to metallic impurities and oh content, optical grade fused quartz does not boast the range of transmission offered by uv and ir grade fused silica. Quartz glass uvgrade fused silica optical transmission. Get the updated 2014 ross lens catalog database for use with zemax. In light pipes light enters and reflects from the walls, at the glassair boundary an indeterminate number of times until it emerges. Ge 124 fused quartz ge 124 is a very pure fused quartz, made from crystalline silica. This limit corresponds to a respirable quartz concentration ranging from 0. Fused silica casting spouts, flow rods, and retainer rings from leco corporation.
Cost of the material ranges widely by type and purity. Fused silica is a chemical combination of silicon and oxygen. Esco manufactures a variety of standard planoconvex s1 uv grade fused silica cylinder lenses. The two fused silica wafer materials are almost identical in composition, properties and transmission, and can be used interchangeably. The thermal, mechanical and chemical stability due to its purity makes fused silica resistant to scratching and thermal shock. High volume stability, low volumetric expansion and high purity make fused silica a very useful and versatile material for refractory applications, whether in aluminum launders or other highly cyclical applications.
In addition to superior transmission, the synthetic fused silica of these optical windows exhibit higher thermal properties, exceptional purity, and excellent environmental durability for. In addition to its high thermal shock resistance, fused silica refractories also have an extremely low coefficient of thermal. Thorlabs uv grade fused silica planoconcave lenses have a uv antireflection coating for the 245 400 nm range deposited on both surfaces. Fused silica, fused quartz ready for immediate delivery. It is planeparallel plates and is likely to be anti reflection coated.
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