BAL41 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) 1.563839
Abbe Number (Vd) 60.695914
Dispersion Formula Schott
Wavelength Range 0.365 — 0.9 µm
$$n(\lambda) = \sqrt{2.41074 - 0.010238\,\lambda^2 + 0.0123341\,\lambda^{-2} + 0.000378238\,\lambda^{-4} - 2.55045 \times 10^{-5}\,\lambda^{-6} + 1.45638 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.8
TCE 100/300°C (10-6/K) 9.1
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.4071 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.78
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
H-BAK6 CDGM 1.56388 60.764747
SK11 Schott 1.56384 60.798869
N-SK11 Schott 1.56384 60.8
SK11 Sumita 1.56384 60.8
BACD11 Hoya 1.56384 60.83
B64-61 Corning 1.564005 60.964853
K-SKLD300 Sumita 1.5642 60.4
P-SK11 Sumita 1.5658 61.0
K-PSK11 Sumita 1.5658 61.0
K-PSK11(M) Sumita 1.55985 61.0
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-BAL41 Ohara 1.563839 60.666575
L-PHL1 Ohara 1.56455 60.818065
S-BAL50 Ohara 1.559625 61.172671
BAL50 Ohara 1.559625 61.172671
L-PHL2 Ohara 1.5588 62.558541
BAL15 Ohara 1.556711 58.689461
BAL15Y Ohara 1.556711 58.679177
S-BAL22 Ohara 1.568729 63.10486
BAL22 Ohara 1.568729 63.162358
L-BAL42 Ohara 1.583126 59.385694
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