BAM12 by Ohara

Obsolete Unknown Environmentally Dangerous

BAM12 by Ohara is an obsolete optical glass. It transmits from 0.38 to 0.90 µm with an nd of 1.6393 and a Vd of 44.878032. It has medium thermal expansion (CTE of 7.6×10⁻⁶/K) and dangerous environmental properties.

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: 0.380–0.900 µm
Optical Properties
Refractive Index (nd) 1.6393
Abbe Number (Vd) 44.878032
Dispersion Formula Schott
Wavelength Range 0.365 — 0.9 µm
$$n(\lambda) = \sqrt{2.62858 - 0.00908587\,\lambda^2 + 0.0195519\,\lambda^{-2} + 0.000669893\,\lambda^{-4} - 2.51015 \times 10^{-5}\,\lambda^{-6} + 3.04778 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.6
TCE 100/300°C (10-6/K) 8.7
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.9903 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.8
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 Compare
BAF12 Sumita 1.6393 45.0
BAF12 Hoya 1.639302 45.070071
BAF23 Hoya 1.652238 44.922169
BAF51 Schott 1.652242 44.930457
N-BAF51 Schott 1.65224 44.96
C48-46 Corning 1.647747 46.227993
ATF4 Hoya 1.653757 44.723072
C38-42 Corning 1.637752 42.433862
N-KZFS11 Schott 1.63775 42.41
K-LCV161 Sumita 1.6182 45.3
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-BAM12 Ohara 1.6393 44.872804
BAM9 Ohara 1.643279 47.850606
BAM8 Ohara 1.62374 47.09722
S-NBM51 Ohara 1.613397 44.267706
BPM51 Ohara 1.613397 44.266767
BPM4 Ohara 1.6134 43.841533
BAH13 Ohara 1.668921 44.987354
BPH35 Ohara 1.644496 40.817749
S-NBM52 Ohara 1.622049 41.079324
BAM4 Ohara 1.60562 43.723021
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