N-SF11 Specifications

Index of Refraction at d-Line (587.6 nm)a

1.785

Abbe Number (Vd)

25.68

Transmission Range

420 nm - 2.3 µm

Density

3.22 g/cm3

Knoop Hardness

615 kg/mm2

Young's Modulus

92 GPa

Shear Modulus (Calculated Value)

36.6 GPa

Bulk Modulus (Calculated Value)

63.1 GPa

Poisson's Ratio

0.257

Coefficient of Thermal Expansion

8.5 x 10-6 /°C

Heat Capacity

0.710 J/(g*K)

Softening Point

592 °C

Change in Index of Refraction with 
Temperature (+20/+40°C @ 1060 nm)

0.1 x 10-6 /°C