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“N”-glass as an environmentally friendly alternative to conventional lead and arsenic-containing glass types. Find more information in the tabs below or on our website . Compare glass types with our Interactive Abbe Diagram .
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The SCHOTT TIKANA® glass range is particularly well-suited...
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Data Sheet SCHOTT N-BK 7® 517642.251 n n d e = 1.51680 = 1.51872 ½ ½ d e = 64.17 = 63.96 n n F F'--n n C C' = 0.008054 = 0.008110 Refractive Indices » [nm] n2325.42325.41.48921 n1970.11970.11.49495
- Glass Thicknesses
- Mechanical Properties
- Thermal Properties
- Chemical Resistance
BK7 raw material comes in glass blocks. Hence, it is not available as glass sheets with standard thicknesses. Therefore, the glass thickness always needs to be specified individually. To offer our customers the best possible service and high availability, we continually polish the glass thicknesses shown in the following table. We can manufacture t...
Density: 2.51 g/cm3Young's modulus E: 82 × 103 N/mm2Poisson's ratio μ: 0.206Knoop hardness HK0.1/20: 610Coefficient of expansion:Viscosities:Transformation temperature Tg: 557 °CThermal conductivity: 1.114 W/(m × K)Climate Resistance Class 2 The resistance of N-BK 7 glass against humidity is expressed by CR-Classes 1 (high) to 4 (low).Stain Resistance Class 0 The resistance of N-BK 7 glass against staining is expressed by FR-Classes 0 (high) to 5 (low).Acid Resistance Class 1 The resistance of N-BK 7 glass against acid solutions is expressed by SR-Classes 0 (high) to 4 (low).Alkali Resistance Class 2 The resistance of N-BK 7 glass against alkali solutions is expressed by AR-Classes 0 (high) to 4 (low).Datasheet SCHOTT N-BK7® n d = 1.51680 n d = 64.17 n F - n C = 0.008054 517642.251 n e = 1.51872 n = 63.96 n F' - n C' = 0.008110 Refractive Indices Internal Transmittance τ i Relative Partial Dispersion P
1013.0 =Temperature of the glass in °C at a viscosity of 1013 dPa·s T 107.6 =Temperature of the glass in °C at a viscosity of 107.6 dPa·s c p =average specific heat capacity in J/(g·K) » =Thermal conductivity in W/(m·K) AT* =Yield point/sag temperature in °C Á =Density in g/cm3 E =Elasticity modulus in 103 N/mm2 µ =Poisson's ratio
N-BK7HT n d = 1.51680 n d = 64.17 n F - n C = 0.008054 517642.251 n e ... Optical Glass Datasheet N-BK7HT Author: SCHOTT AG Subject: Optical Glass Datasheets Keywords:
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What is N-BK7 glass?
Why should you choose N-BK7 glass?
What does N-BK7 stand for?
What is BK7 glass used for?
What is the difference between Bk4 and BK7 glass?
How to fabricate N-BK7 optics?
A frequent choice for high quality optics and prisms, N-BK7 (and BK7 before it) is a relatively low-cost, high-purity borosilicate with an extremely small amount of bubbles or inclusions that makes it ideal for optical applications in the visible spectrum.
