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China, Chinese N-Bk7 Optical Glass/Optical Glass/Borosilicate Glass1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Nonmetallic MineralsQuartzSchott GlassSchott N-Bk7
Shanghai Rui Tai Photoelectric Technology Co., Ltd.
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Product Description General Introduction:N-BK7 is borosilicate crown glasses with exceptional optical homogeneity. Laser components uses this glass when especially high demands of quality are put on the glass in both transmission and reflection.BK7 is also a very pure universal optical glass. Among optical glass series products, It is one of the most standard glass types used to produce high-quality optics, mainly for the visible spectrum. The relatively hard borosilicate crown material consists of the purest raw ingredients. It contains very few inclusions and is almost free of bubbles.Products Name: N-BK7 Glass Main Characteristics:1). Excellent quality at a low price.2). Very good to process: easy to polish. The achievable polishing quality is suited for high power laser applications. 3). Material can be used without exception in transmission in the wavelength range from 400nm to 2000nm.4). When used as HR mirror, this material can also be used outside of this wavelenght range because the beam does not penetrate the material.BK7 is a block glass, it is not available as natural blank glass sheets. So, there are no standard thicknesses. Therefore, the glass thickness must be specified individually as per users requirements.Thermal Properties:ItemValueCoefficient of Expansion:7,1 x10-6/K (-30 °C to +70 °C) 8,3 x10-6/K (+20 °C to +300 °C)Viscosities: Softening Point (107,6 dPa):719 °CAnnealing Point (1013 dPa):557 °CTransformation temperature Tg:557 °CThermal conductivity:1,114 W/(m x K)Specific heat capacity:0,858 J/(g x K)(20 °C ; 100°C)Mechanical Properties:ItemUnitValueDensityg/cm32.51Yong's Module EGPa82 x 103 N/mm2Poisson's ratio μ 0,206Compression strengthGPa-Bending strengthMPa-Tensile strengthMPa-Torsional rigidityGPa-Vickers hardnessGPa--Knoop Hardness HK 0,1/20 (ISO9385)-610Abrasion Aa*-ve = 63,96vd = 64,17Refractive index nd--Softening pointoC-Annealing pointoC-Strain pointoC-Specific heat(26oC)kJ/kgK-Thermal conductivity ratio(26oC)cal/cm.sec.oC-Thermal conductivity ratio(100oC)Cal/cm.sec.oC-Refractive Index nameWavelength (nm)Refractive Indexni365,01.53627nh404,71,53024ng435,81,52668nF'480,01,52283nF486,11,52238ne546,11,51872nd587,61,51680nD589,31,51673n632,8632,81,51509nC643,81,51472nc656,31,51432nr706,51,51289ns852,11,50980nt1014,01,50731Main Applying Fields: Applying Fields:Typical Applications1).Demanding optical applications2).Base material for precision optics3).Windows, lenses, and prisms4).Substrates for mirror and filter coatings5).Measurement and sensor-technology use6).Lenses and dispersion prims***** Matching Custom Manufacturing Serivce:Including Moulding, CNC machining, Polishing, Particle beam processing, Magnetic flux conversion processing, Grinding, Coating, Lightweighting, Custom Shaping, Counterbores, Drilling & Coring, Edge & Bevel Polishing,3D Contouring, Bevels & Chamfers, Steps & Slots, Laser Cutting & Marking, Metrology & Inspection, Precision Pitch Polishing, Double-Sided Polishing, Optical Assembly, Measuring, etc.Matching processing equipments;1).Single side lapping and polishing machines2).Duble sided polishing machines3).Ring throwing machines4).DMG five-axis five-linkage spherical milling machine5).DMG ultrasonic machining center6).Super large scale gantry cnc machining center (2.0*2.0m)7).Super large scale surface grinder (1.6m*1.6m)8).CNC cutting machines9).Thin plate cleaning machines10).Ultrasonic trough cleaning machines11).Plane interferometers12).Two dimensional detectors13).Ion beam polishing machines14).Magnetorheological polishing equipmentsMain Export Countries & Areas: Usa, Uk, Japan, Germany, Spain, France, Swiss, Korea, Russia, Pakistan, India, Portugal, Canada, New Zealand, Australia, Saudi Arab, Turkey, Finland, Poland ,etc.Raytekoptics Extra value added services offered:1). Optical workcraft & process solution design;2). Rough processing raw materials;3). Semi finishing raw materials;4). Fabricate custom sizes and shapes;5). Design and supply custom coatings;6). Modify and resurface customer supplied materials;7). Drill holes, notch glass and provide beveled substrates;8). Precision polish optics with non-standard aspect ratios;Payment Method: by T/T or Western Union.Delivery time: 7-10 days. Quality Warranty: Ruitaiphotoelectric(Raytekoptics) offers quality warranty for our optics products with "3R" policy--return, replace & refund policy. For any inferior-quality products, Ruitaiphotoelectric(Raytekoptics) is responsible for return, replacement and refund.
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