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 BK7 glass.
Transmission range: 330 nm~2100 nm
Thermal Expansion Coefficient: 7.5X10 -6 /K
Density: 2.51 g/cm 3
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