BK7 Schott Glass Optical Properties

BK7 Optical Glass

Optical glass with high transmission, can be selected nearly free of bubbles and inclusions and has very good homogeneity (down to 1x10-6)

Thermal/Mechanical Properties

Density (at 20 °C/68 °F): 2.51 g/cm ³
Thermal Coefficient of Expansion (20/300 °C): 7.0 x 10^-6/°C
Strain Point:°C/ °F
Annealing Point:°C/ °F
Softening Point:°C/ °F

Optical Properties

Refractive Index(l=582.1nm): 1.509
Optical transmission

Chemical Properties

Hydrolytic resistance: class 2
Acid resistance: class 1
Alkali resistance: class 2

Electrical Properties

Dielectric Constant: E=

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