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B270 Colorless Optical Glass Windows

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B270 colorless optical glass windows

Product description:
 Colorless optical glass is mainly for BK7, B270, quartz glss of JGS1,JGS2,JGS3 and other materials. And we can custom made according to customers requirements. Its transmission is 7% higher than common glass, it can arrive at 99%. 
And B270 show windows common size for 300*400, 400*600, etc. 

Colorless optical glass--B270 technology requirement
ModelThicknessλtjλ0Tλ0K
(mm)(nm)(nm)(%)
B270 1-5310±10400≥89.5≥1.0

B270 Ultra White Glass

Nature of opticalThrough rate
nd1.5230
ne1.5251
ve58.3
2mm91.7%
4mm91.6%
15mm91.0% 
 
Mechanical performance Standard value
Density2.55g/cm3
Knoop hardness HK 100542kg/mm2
Young's modulus E71.5kN/mm2
Poisson's ratio μ0.208
 
Thermal propertiesStandard value
Strain point511°C 
Annealing Point541°C 
Softening point724°C 
Coefficient of thermal expansion9.4×10E-6/K
 
Chemical performanceStandard value
Deliquescence(ISO719)HGB3
Acid resistance(ISO1776)2
Alkaline resistance(ISO695)A2

B270 Colorless Optical Glass Windows
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B270 Colorless Optical Glass Windows

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