BAL15 by Ohara

Obsolete Unknown Environmentally Dangerous
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: 0.300–0.900 µm
Optical Properties
Refractive Index (nd) 1.556711
Abbe Number (Vd) 58.689461
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.38765 - 0.00975642\,\lambda^2 + 0.0125469\,\lambda^{-2} + 0.000381085\,\lambda^{-4} - 2.36563 \times 10^{-5}\,\lambda^{-6} + 1.50685 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.4
TCE 100/300°C (10-6/K) 8.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.255 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.92
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 2
Alkali Resistance —
Phosphate Resistance 2
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
BAK5 Schott 1.556709 58.649202
BAC5 Hoya 1.556708 58.562365
H-BAK5 CDGM 1.56069 58.344731
K-SKLD300(M) Sumita 1.56124 60.1
BAK50 Schott 1.567736 57.990411
K-SKLD300 Sumita 1.5642 60.4
H-BAK6 CDGM 1.56388 60.764747
SK11 Schott 1.56384 60.798869
SK11 Sumita 1.56384 60.8
N-SK11 Schott 1.56384 60.8
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
BAL15Y Ohara 1.556711 58.679177
S-BAL41 Ohara 1.563839 60.666575
BAL41 Ohara 1.563839 60.695914
BAL11 Ohara 1.572501 57.760854
S-BAL11 Ohara 1.572501 57.74298
L-PHL1 Ohara 1.56455 60.818065
BAL12 Ohara 1.539955 59.454008
S-BAL12 Ohara 1.539956 59.462478
BAL50 Ohara 1.559625 61.172671
S-BAL50 Ohara 1.559625 61.172671
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