BAM21 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: 0.330–0.900 µm
Optical Properties
Refractive Index (nd) 1.626059
Abbe Number (Vd) 39.215631
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.57946 - 0.00942256\,\lambda^2 + 0.0211959\,\lambda^{-2} + 0.000809435\,\lambda^{-4} - 2.49222 \times 10^{-5}\,\lambda^{-6} + 3.98612 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.2
TCE 100/300°C (10-6/K) 9.2
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.781 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.63
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 1
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
BASF1 Sumita 1.62606 39.1
BAFD1 Hoya 1.626057 39.085725
H-BAF8 CDGM 1.62604 39.071631
BASF1 Schott 1.626061 38.962861
F9 Hoya 1.620446 38.090002
F9 Schott 1.620451 38.080601
F9 Sumita 1.62045 38.0
H-BAF7 CDGM 1.61413 39.985319
BAF7 CDGM 1.614131 40.025731
BASF3 Sumita 1.60717 40.2
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
PBM9 Ohara 1.620451 38.119955
S-NBM52 Ohara 1.622049 41.079324
BAM23 Ohara 1.607167 40.26316
S-TIM3 Ohara 1.612929 37.005342
PBM3 Ohara 1.612929 36.994096
PBM4 Ohara 1.616588 36.632973
BPH35 Ohara 1.644496 40.817749
PBM2Y Ohara 1.620041 36.269263
S-TIM2 Ohara 1.620041 36.263378
PBM2 Ohara 1.620041 36.256658
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