S-BAH32 by Ohara

Special Unknown Environmentally Friendly

S-BAH32 by Ohara is a special optical glass. It transmits from 0.36 to 2.40 µm with an nd of 1.669979 and a Vd of 39.271035. It has medium thermal expansion (CTE of 6.9×10⁻⁶/K) and excellent chemical resistance.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.36–2.4 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.36–2.4 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.360–2.400 µm
Optical Properties
Refractive Index (nd) 1.669979
Abbe Number (Vd) 39.271035
Dispersion Formula Sellmeier
Wavelength Range 0.36 — 2.4 µm
$$n(\lambda) = \sqrt{1 + \frac{1.58024\,\lambda^2}{\lambda^2 - 0.0103578} + \frac{0.137505\,\lambda^2}{\lambda^2 - 0.0548393} + \frac{1.60603\,\lambda^2}{\lambda^2 - 147.983}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.9
TCE 100/300°C (10-6/K) 7.8
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.61 \times 10^{-6} + 2(1.09 \times 10^{-8})\,\Delta T + 3(-2.95 \times 10^{-11})\,\Delta T^2 + \frac{7.14 \times 10^{-7} + 2(9.64 \times 10^{-10})\,\Delta T}{\lambda - 0.254}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.26
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance 1
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BASF12 Schott 1.669979 39.200523
BASF12 Sumita 1.66998 39.2
ADF405 Hoya 1.6765 37.477902
C55-40 Corning 1.6555 40.115717
H-TF5 CDGM 1.6541 39.539424
E-ADF50 Hoya 1.65412 39.62
ADF50 Hoya 1.654118 39.624202
KZFSN5 Schott 1.65412 39.63
N-KZFS5 Schott 1.65412 39.7
KZFS7A Schott 1.68064 37.389991
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
BAH32 Ohara 1.669979 39.279752
S-NBH52V Ohara 1.673 38.256077
S-NBH52 Ohara 1.672999 38.14817
BPH40 Ohara 1.676498 37.537388
S-NBH5 Ohara 1.654115 39.682794
BPH5 Ohara 1.654115 39.687638
BAH26 Ohara 1.667551 41.927521
BAH30 Ohara 1.650158 39.390461
BAH22 Ohara 1.664459 35.812757
BPH35 Ohara 1.644496 40.817749
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