BSM2 by Ohara

Obsolete Unknown Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–0.9 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–0.9 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.350–0.700 µm
Optical Properties
Refractive Index (nd) 1.607379
Abbe Number (Vd) 56.815789
Dispersion Formula Schott
Wavelength Range 0.365 — 0.9 µm
$$n(\lambda) = \sqrt{2.54078 - 0.00928151\,\lambda^2 + 0.0149032\,\lambda^{-2} + 0.000377907\,\lambda^{-4} - 1.2453 \times 10^{-5}\,\lambda^{-6} + 7.0936 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.3
TCE 100/300°C (10-6/K) 7.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.2303 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.54
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
BACD2 Hoya 1.60738 56.72
SK2 Sumita 1.60738 56.7
H-ZK50 CDGM 1.60738 56.654511
H-ZK50GT CDGM 1.60738 56.654511
SK2 Schott 1.607381 56.650108
N-SK2HT Schott 1.60738 56.65
N-SK2 Schott 1.60738 56.65
C07-57 Corning 1.607504 56.610495
K-VC79(M) Sumita 1.60737 57.2
SK1 Schott 1.61025 56.712386
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-BSM2 Ohara 1.607379 56.816076
BSM6 Ohara 1.613749 56.365919
S-BSM4 Ohara 1.612716 58.716945
S-BSM9 Ohara 1.614047 54.990097
BSM9 Ohara 1.614047 54.971106
BSM4 Ohara 1.612716 58.749129
S-BSM10 Ohara 1.622799 57.052723
BSM10 Ohara 1.622799 57.063643
BSM24 Ohara 1.617646 55.049782
BSM15 Ohara 1.622992 58.143312
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