L-BBH2 by Ohara

Obsolete Unknown Precision Molding Environmentally Friendly
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.3–2.4 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.3–2.4 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.420–2.400 µm
Optical Properties
Refractive Index (nd) 2.102999
Abbe Number (Vd) 18.051064
Dispersion Formula Sellmeier
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{1 + \frac{2.53279\,\lambda^2}{\lambda^2 - 0.018691} + \frac{0.583375\,\lambda^2}{\lambda^2 - 0.0765409} + \frac{1.52993\,\lambda^2}{\lambda^2 - 112.197}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.4
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.61 \times 10^{-5} + 2(2.23 \times 10^{-8})\,\Delta T + 3(-5.18 \times 10^{-11})\,\Delta T^2 + \frac{3.36 \times 10^{-6} + 2(3.2 \times 10^{-9})\,\Delta T}{\lambda - 0.311}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 6.74
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 2
Stain Resistance —
Acid Resistance 52
Alkali Resistance —
Phosphate Resistance 2
Notes

Low Softening Temperature

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Glass Manufacturer nd Vd
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Similar Glasses (Ohara)
Glass Manufacturer nd Vd
L-BBH1 Ohara 2.101949 16.785097
S-LAH79 Ohara 2.0033 28.27328
S-LAH99W Ohara 2.001 29.139473
S-LAH99 Ohara 2.001 29.139473
S-NPH3 Ohara 1.95906 17.471252
S-TIH57 Ohara 1.963 24.1144
S-NPH2 Ohara 1.92286 18.896912
PBH21 Ohara 1.922861 20.884172
PBH71 Ohara 1.922864 21.288699
S-LAH98 Ohara 1.953749 32.324727
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