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Products Details
  • Products Name: N-BK7 / H-K9L
  • Products Number: N-BK7
  • Published: 2017-03-02
  • Inventory:
  • Views : 25

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 N-BK7 is the RosH compliance material of BK7. N-BK7 is a borosilicate crown ptical glass, which has high homogeneity, low bubble and inclusion content. Its good physical and chemical properties make it widely used in visible and near IR range. Most of windows, lenses and prisms, which used in laser, optical system, optical communication, are made from N-BK7 glass. 

Transmission range: 330 nm~2100 nm;

Thermal Expansion Coefficient: 7.5X10-6/K;

Density: 2.51 g/cm 3;

 

 

Materials Refractive Index (nd) Abbe Number (Vd) Density (g/cm3) Transmission Range (mm) Thermal Expansion Coefficient (10 -6 /K)
1.5168 64.2 2.52 0.33-2.10 7.5
N-SF5 1.6726 32.17 4.08 0.33-2.5 8.2
N-SF11 1.78472 25.76 4.87 0.37-2.5 6.8
Fused Silica 1.45847 67.82 2.2 0.185-2.5 0.54
Pyrex 1.474009 65.38 2.23 0.23-2.7 3.25
CaF2 1.433849 94.99 3.18 0.17-7.8 18.85
Sapphire 1.768234 72.24 3.99 0.18-4.5 5.8
Silicon 3.47   2.33 1.5-8.0 2.6
Borofloat 1.47140 65.41 2.23 0.33-2.60 3.25