BAM3 by Ohara

Obsolete Unknown Environmentally Dangerous

BAM3 by Ohara is an obsolete optical glass. It transmits from 0.31 to 1.80 µm with an nd of 1.582673 and a Vd of 46.423092. It has medium thermal expansion (CTE of 8.1×10⁻⁶/K), good 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: 0.310–1.800 µm
Optical Properties
Refractive Index (nd) 1.582673
Abbe Number (Vd) 46.423092
Dispersion Formula Sellmeier
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{1 + \frac{1.26474\,\lambda^2}{\lambda^2 - 0.00791188} + \frac{0.189784\,\lambda^2}{\lambda^2 - 0.038067} + \frac{1.10509\,\lambda^2}{\lambda^2 - 133.832}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.1
TCE 100/300°C (10-6/K) 9.2
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.1992 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.18
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance 2
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BAF3 Hoya 1.58267 46.462286
BAF3 Schott 1.58267 46.469988
BAF3 Sumita 1.58267 46.5
BAF4 CDGM 1.582712 46.505886
H-BAF4 CDGM 1.58267 46.597786
N-BAF3 Schott 1.58272 46.64
BAFN6 Schott 1.589 48.45
KZFSN9 Schott 1.598557 46.903842
BAF6 Hoya 1.589003 48.543984
KZFS6 Schott 1.591965 48.509579
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-BAM3 Ohara 1.582673 46.423175
PBL21 Ohara 1.573092 42.576094
BAM4 Ohara 1.60562 43.723021
PBL26Y Ohara 1.567322 42.855569
S-BAM4 Ohara 1.60562 43.706978
PBL26 Ohara 1.567322 42.831708
S-TIL26 Ohara 1.567322 42.817076
BAM5 Ohara 1.607289 49.188575
BAL2 Ohara 1.570989 50.797474
S-BAL2 Ohara 1.570989 50.799858
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