Production and properties of fused silica wafers fused silica or fused quartz is the amorphous phase of quartz sio 2 in contrast to e. For more specific values, follow the links immediately below. Fused silica lattice what is the difference between fused quartz and fused silica. Fused silica is perfect optical material due to its good uv and ir transmission, low coefficient of thermal expansion. The dura silicaroll fused silica rollers are used as transport rollers for tempering flat glass,pdp solar and silicon steel industry and so on. High quality silica glass vadprocess synthetic fused silica sk0 our company successfully developed synthetic fused silica sk0 as a result of significant improvements made to the conventional vad vaporphase axial deposition method of optical fiber manufacturing technology. Both fused quartz and fused silica are at least 99. The resistance of a material to indentation is characterized by the indentation hardness. Schott also publishes a glass catalog schott optical glass datasheets, which is a standard reference for the properties of many optical glasses. Vesuvius provides engineered fused silica products used in glass melting furnaces for both molten glass contact and furnace superstructure. Schott also publishes a glass catalog schott optical glass datasheets, which is a standard reference for.
In most cases, it is also recommended to match the i. Get the updated 2014 ross lens catalog database for use with zemax. Fused quartz is manufactured from the melting and refusing of crushed natural crystalline quartz. Glasses having a low refractive index in general also have a low dispersion behavior e. Our fused silica wafers are hpfs high purity fused silica 7980, uv grade fused silica wafers. There are four basic types of commercial silica glass. Fused silica is a synthetic material fused from various chemicals in a very controlled environment. For applications in the visible and infrared up to about 2. This page shows summary ranges across both of them. Buy high quality and affordable fused silica glass via sales. Materials designed for their transmission or absorption properties. Agi offers corning 7980 fused silica in optical, uv, krf, and arf grades. Both hydrous and anhydrous low oh content quartz with.
Custom lens designed with zemax and bk7g18 schott radhard glass. Fused quartz or fused silica is glass consisting of silica in amorphous noncrystalline form. This tubing is untreated, for general purpose use where high inertness is not necessary. I wondered if the cheaper glass would be much of a handicap for imaging and as ive never used anything other than a refractor for imaging, im really looking for opinions. Optical transmission of fused silica wafers corning 7940. Com 15 specifications custom sizes and fused silica uv gradesio2 specifications are available optical refractive index at n e 1. The fused silica blocks are cut into wafers, and the wafers finally polished. Since 1960, dynasil fused silica has provided precision optical materials, including high purity synthetic fused silica and fused quartz products, to customers for a wide and everincreasing range of applications. Our fused silica wafers is a a high purity synthetic amorphous silicon dioxide. Crystal quartz is a very useful material for fabrication of finished optics. Fused silica and other transparent window materials. Hpfs fused silica glasses are known throughout the industry for their consistent, repeatable performance. Fused silica is formed by chemical combination of silicon and oxygen. Fused silica is the glassy form of quartz and is thus isotropic.
Nonpolar deactivation for injection solvents such as alkanes, carbon disulfide, and ethers. Normal varieties of fused silica contain water which gives strong absortion in the ir. Cm scientific, formerly composite metal services, was established in 1980 to supply specialised scientific laboratory consumables and equipment. Untreated fused silica tubing fused silica tubing sigma. Fused silica is tough and hard and has a very low expansion. Hpfs 7979, 7980 and 8655 fused silica hpfs fused silica glasses are known throughout the industry for their consistent, repeatable performance. Unless specifically requested, schott optical glass will be delivered in refractive indexabbe number step 33 with a standard test report. Fused silica uv gradesio2 specifications are available optical refractive index at n e 1. Apollo skylab 7374, mir iss 98xxxx shuttle orion only one unexpected failure during an apollo window proof test. Schott to equip the main mirror of the worlds largest telescope with zerodur 4meter mirror blank cast for the elt project. Glass codes 7979, 7980, and 8655 are high purity noncrystalline silica. Tempered safety flat glass used mainly as architecture glass curtain wall, automotive industry and so on. In the ultraviolet down to 195 nm, uv fused silica is a good choice. Glass codes 7980, 7979, and 8655 are high purity noncrystalline silica glasses with excellent optical qualities.
Schott mlq1 exhibits high homogeneity and has no striations in one spatial direction. Compare prices on fused silica glass shop best value. Fused refers to the way the glassy mass is produced and in this regard it is more appropriate to use fused silica and not fused quartz although many people prefer not to see the difference. Lithosiltmq0 is characterized by its high threedimensional opti. The radome has a density equal to or greater than 95 percent of theoretical density, an average bend strength equal to or greater than 10 kpsi, a thermal expansion of about 0. 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. Fused silica uv gradesio2 specifications are available. Refractive index of schott multiple purpose d263teco. Shaping of the fused silica products is achieved by pressing or slip casting in the presence of chemical binders. Enjoy exclusive discounts and free global delivery on fused silica glass at aliexpress. Classification according to schott optical glass nomenclature.
Schott ml q fused silica schott mlq0 is characterized by its high threedimensional optical homogeneity. Uv fused silica also has excellent transmission in the visible and infrared up to about 2. Schott ag schott ag is a german glass manufacturer. It contains general information for the determination and evaluation of important glass properties and also informs about specific chemical and physical characteristics and possible applications of the commercial technical glasses produced by schott. Compare prices on fused silica glass shop best value fused. Traditionally optical glasses in the range of n d 50 are called crown glasses, the other ones as flint glasses. Fused silica is used for viewing windows, being transparent to. Fused silica minimizes focus shift while providing high power density. Corning hpfs 7979, 7980, 8655 fused silica glass fab, inc. Fused silica tubing guard columnsretention gaps sigma.
Fused silica for investment casting refractory applications imerys produces several grades of coarse fused silica grains stuccos and powders flours for the investment casting and refractory industries. Synthetic fused silica is used in the manufacture of optical components, lasers, semiconductors, telecom equipment, electronics, scientific instruments, and an assortment of energy. This glass has superior transmission in both the uv and ir spectra, a very low dielectric coefficient and excellent properties where flourescence or. The optical designs are optimized with respect to back reflections of the input beam, which significantly reduces the risk of damage to the galvo mirrors. Both hydrous and anhydrous low oh content quartz with low bubbles and high heat resistance are available.
You can access an abbediagram in pdf format as well as an overview of all of our glass types optical glass overview and optical glass overview zemax. Fused silica, therefore, has high working and melting temperatures. About 29% of these are quartz tubes, 0% are steel pipes. High purity fused silica hpfs fused silica corning. In fact, many people use the terms fused silica and. Our revolutionary furnace design helps prevent raw silica sand from becoming contaminated during processing, resulting in a product that is 99. The properties of fused silica include two common variations.
Glass codes 7979, 7980, and 8655 are high purity noncrystalline silica glasses with excellent optical qualities. Consult schott glass entire fused silica catalogue on directindustry. The linos fthetaronar lenses are all treated with a. Everything you need to know in 6 minutes video innovation roundtable in china about the elt. Free of striations in any spatial direction, it is recommended for highend resolution requirements in such optical elements as prisms and lenses. Intermediate polar deactivation for injection solvents such as acetone, methylene chloride dichloromethane, and.
Fused silica is used for viewing windows, being transparent to wavelengths from around 0. For caf2 we have adopted the schott fit used by epps for soar. Materials with low thermal expansion and high transmission. Fused silica workhorse material fused silica has been the historical material of choice. How to use glass substitution to optimize the glasses in your optical. These uncoated uvgrade fused silica planoconvex lenses are available in sizes ranging from o2 mm to o75 mm. Type i is produced by induction melting natural quartz in a vacuum or an inert atmosphere. High quality silica glass quartz ohara corporation. Measured optical constants of fused silica sio 2 glass 1. Each process yields specific characteristics optimized for use within a given range of the uv, visible and nearinfrared portions of. A new and improved fused silica radome is discussed. Ohara synthetic fused silica is produced by vaporphase axial deposition and provides ultrahigh purity, bubble free material. It has high stability and resistance to thermal shock over large temperature excursions, wide temperature operating range and high laser damage threshold. Click on a material above or choose a schott or ohara part number, to see the spectral and the material properties.
Schott technical glasses offers pertinent information in concise form. The sellmeier fit for fused quartz is a zemax fit of index data for heraeus. The sio 2 dust formed hereby is fused to silica on a substrate. Schott begins manufacturing primary mirrors for elt. Fused silica fused quartz fused silica is a glasstype material. Due to fused silicas low thermal conductivity and excellent thermal shock resistance, it. Ohara also supplies natural quartz made from highpurity crystals. Everybody agrees that fused silica and fused quartz are amorphous noncrystalline glass made only from silicon dioxide sio 2, but beyond that there is no universally agreed upon definition.
Normal varieties contain water which gives strong absortion in the ir. Fused silica is offered in many different grades to support various product applications. Match the deactivation of the fused silica tubing with the polarity of the injection solvent. Valley design east phoenix park business center 2 shaker road, bldg.
Round windows can be purchased from stock uncoated 185 nm 2. Southern african large telescope prime focus imaging. Bk7, uv fused silica, caf2ir and uv, sapphire, quartz and mgf2. This makes them perfectly suited for a wide variety of demanding applications, including multiphoton imaging systems, and intracavity laser applications. Cost, climate resistance, model glass, glass substitution template. I wondered if the cheaper glass would be much of a handicap for imaging and as ive never used anything other than a refractor for imaging, im really looking for. Uv fused silica windows feature low distortion, excellent parallelism, low bulk scattering, and fine surface quality. Uvgrade fused silica offers high transmission in the deep uv and exhibits virtually no laserinduced fluorescence as measured at 193 nm, making it an. We offer many different grades of fused silica to support various product applications. Fused silica is a highpurity, noncrystalline material manufactured through oxidation of raw silica in a flame hydrolysis process, while fused quartz is fabricated by the melting of naturally occurring quartz. Below are just a small expample of the fused silica wafers that we have in stock. Extremely varied uses from medical to fire detection systems. Dont miss out on key insights, best practices, and news from zemax. The refractive index of all parts of a lot will not deviate by more than 1 x 10 4 2 x 10 4 for pressing from the test report.
Nfk51a optical glass nfk51a is a popular optical glass produced by schott ag. Supremax 33 vs fused silica equipment cloudy nights. Some may think fused silica is a simple material and there is little difference in which grade should be used. It has a fairly low density among the glass and glassceramics in the database. Applications include optical, biomedical, communications, laser manufacturing, aerospace avionics, semiconductor, fiber optic and electronics. Optical materials, bk7, fused silica, sapphire, caf2, mgf2. Although the terms fused quartz and fused silica are used interchangeably, the optical and. The following is a list of optical materials that we have worked in the past. Optische glaser seit uber 125 jahren fertigen wir in. Type ii is produced by fusing quartz crystal powder in a hightemperature flame. This is one of the most frequently asked questions by our customers.
Optical grade fused quartz is suitable for wavelength 2202500nm uv grade fused silica is suitable for wavelength 1852500nm and full spectrum fused silica is suitable for 2603500nm besides the instock slides listed below, we also offer custom made slides. Our fused silica wafers ahve a very low thermal expansion coefficient, very good homogeneity including excellent optical properties and exceptional transmittance in the uv range. Lithosiltmq is available in six different quality grades. Fused silica vs fused quartz vs quartz vs amorphous silica. These wafers show a high transparency in the ultraviolet spectral range. Fused quartz is produced by fusing melting highpurity silica sand, which consists of quartz crystals. Quartz glass and fused silica for optical applications heraeus. Normal varieties contain water which gives strong absortion in.
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