BAL12 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: 0.340–0.700 µm
Optical Properties
Refractive Index (nd) 1.539955
Abbe Number (Vd) 59.454008
Dispersion Formula Schott
Wavelength Range 0.365 — 0.9 µm
$$n(\lambda) = \sqrt{2.33914 - 0.00964505\,\lambda^2 + 0.0107224\,\lambda^{-2} + 0.000718516\,\lambda^{-4} - 6.9113 \times 10^{-5}\,\lambda^{-6} + 3.5434 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.3
TCE 100/300°C (10-6/K) 10.1
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.2683 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.75
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
BAK2 Sumita 1.53996 59.7
BAK2 Schott 1.53996 59.708588
N-BAK2 Schott 1.53996 59.71
B39-59 Corning 1.539505 59.712433
BAC2 Hoya 1.539961 59.721586
H-BAK2 CDGM 1.53996 59.724182
H-BAK1 CDGM 1.53028 60.466139
ZNC1 Hoya 1.533149 58.063515
ZK1 Schott 1.533149 57.980912
BACL1 Hoya 1.526417 60.113677
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-BAL12 Ohara 1.539956 59.462478
NSL5 Ohara 1.522494 59.790926
BAL15 Ohara 1.556711 58.689461
S-NSL5 Ohara 1.522494 59.835417
BAL15Y Ohara 1.556711 58.679177
NSL3 Ohara 1.518229 58.966406
S-NSL3 Ohara 1.518229 58.902057
BAL50 Ohara 1.559625 61.172671
S-BAL50 Ohara 1.559625 61.172671
S-BAL41 Ohara 1.563839 60.666575
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