Xinyu Xu Tking Glass Co., Ltd.  

Product Name: High Temperature Resistance Glass Gobo Borofloat3.3 Camera Lens Model NO.: TK01 Size: 20mm 30mm 40mm 50mm Temperature: 550degree C Glass Material: Quartz Glass, Borofloat3.3 Thickness: 0.2mm 0.3mm 0.4mm 0.5mm 0.7mm 1.mm Trademark: TKING Transport Package: Export Packing Specification: 25x40x30cm Origin: Made in China HS Code: 9002909090 Product Description The borosilicate glass' low thermal expansion, its high thermal shock resistance and its ability to withstand temperatures up to 450 °C for long periods make BOROFLOAT®33 a good choice for applications which call for good temperature stability (e.g. internal panels in pyrolytic self-cleaning ovens and cover plates for high-power floodlights).lProductfeatures:a)Highheatresistanceb)Thewholebandrangehasexcellenttransmissionperformancec)Goodresistancetostrongalkalid)ExcellentsurfaceshapeaccuracylTypical application:Micro-opticsMEMS (pressure sensor, accelerometer...)Wafer level packaging (image sensor package...)Bioengineering (microfluidics, DNA analysis...)PLC wafer coverAnd many other customer-specific applications.Technical parameter:a) Material: BOROFLOAT®33, PYREX7740, quartz glass, Corning Eagle-XG, B270, D262T, AF32,Soda limeb) Standard thickness: 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.7mm, 1.0mm, 1.5mm (thickness tolerance ± 0.02mm)c) Standard size: Φ2", Φ3", Φ4", Φ5", Φ6", Φ8", Φ12" (other sizes can be customized)d) Appearance: 60/40e) Surface roughness (Ra) <1.5nmf) Parallelism <0.01mmg) Each edge is blunt C0.05~0.2mmh) Crack <0.2mm, not crackablei) The surface is clean and must not be imprinted or stained. It is packaged under a clean workbench and packaged in a special box.Technical parameters:Density(25ºC)2.2g/cm2Thermal expansion(ISO 7991)3.25´10-6k-1Light transmittance91%Softening point820ºCShort time use<10h550ºCLong timeuse>=10h450ºCRefractive index(587.6nm)1.47140Knoop hardness480Coefficient of Linear Thermal Expansionα(20 - 300 °C)3.25 x 10-6K-1(ISO 7991)RemarksSpecific ThermalCapacityCp (20 - 100°C)0.83 KJ x (kg x K)-1The maximum temperatures in use indicated apply only if the following RTG and RTS values are observed at the same time.Specific ThermalConductivityλ(90°C)1.2 W x (m x K)-1For short-term usageδmax (< 10 h)550°CFor long-term usageδmax (≥ 10 h)450°CViscosity of Borosilicate Glasses:Working Point104dPas1270 °CSoftening Point107.6dPas820 °CAnnealing Point1013dPas560 °CStrain Point1014.5dPas518 °CTransformation Temperature (Tg)525 °CSelected Standard Lasers and Related Wavelengths:Wavelength(nm)LaserMediumWavelength(nm)LaserMediumWavelength(nm)LaserMedium308XeCI488Ar1047Nd:YLF325HeCd514.5Ar1053Nd:YLF337N2532Nd:YAG1064Nd:YAG350xeF632.8HeNe1153HeNe351.1Ar694.3Ruby1319Nd:YAG363.8Ar730-780Alexandrite1730Er:YLF427N2850Er:YLF2060Ho:YLF441.6HeCd905GaAs10640CO2Wavelength λ(nm)435.8479.9546.1Index of Refraction n1.480151.476761.47311Wavelength λ(nm)589.3643.8656.3Index of Refraction n1.471331.469531.46916Abbe ConstantVe=(ne-1)/(nF'-nC')65.41Refractive Indexnd(λ587.6 nm)1.47140DispersionnF-nC71.4×10-4Stress-opticalCoefficentin in Mpa-1K4.0×10-6mm2N-1MPa-1