BAM9 by Ohara

Obsolete Unknown Environmentally Dangerous

BAM9 by Ohara is an obsolete optical glass. It transmits from 0.33 to 0.90 µm with an nd of 1.643279 and a Vd of 47.850606. It has medium thermal expansion (CTE of 6.9×10⁻⁶/K), below average chemical resistance, and dangerous environmental properties.

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) 1.643279
Abbe Number (Vd) 47.850606
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.6447 - 0.00943971\,\lambda^2 + 0.018905\,\lambda^{-2} + 0.000503961\,\lambda^{-4} - 6.93259 \times 10^{-6}\,\lambda^{-6} + 1.54746 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.9
TCE 100/300°C (10-6/K) 8.0
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.07 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.85
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 52
Alkali Resistance —
Phosphate Resistance 3
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BAF9 Sumita 1.64328 47.8
K-BaF9 Sumita 1.64328 47.8
BAF9 Hoya 1.643278 47.941673
BAF9 Schott 1.643276 47.958224
ZBAF2 CDGM 1.639616 48.230454
C48-46 Corning 1.647747 46.227993
CALCITE Generic IR 1.658643 48.541403
CALCITE Generic Birefringent 1.658643 48.541403
K-BaF8 Sumita 1.62374 47.1
BAF8 Sumita 1.62374 47.1
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
BAM8 Ohara 1.62374 47.09722
BAM12 Ohara 1.6393 44.878032
S-BAM12 Ohara 1.6393 44.872804
BAH11 Ohara 1.666718 48.317266
S-BAH11 Ohara 1.666718 48.325247
BSM25 Ohara 1.658441 50.861723
S-BSM25 Ohara 1.658441 50.877554
BAH10 Ohara 1.670029 47.253429
S-BAH10 Ohara 1.670029 47.230916
S-BSM28 Ohara 1.617722 49.815052
Compare Glasses
    Compare Selected