BAH22 by Ohara

Obsolete Unknown Environmentally Dangerous

BAH22 by Ohara is an obsolete optical glass. It transmits from 0.33 to 0.70 µm with an nd of 1.664459 and a Vd of 35.812757. It has medium thermal expansion (CTE of 8.5×10⁻⁶/K), 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: 0.330–0.700 µm
Optical Properties
Refractive Index (nd) 1.664459
Abbe Number (Vd) 35.812757
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.69283 - 0.00901414\,\lambda^2 + 0.025059\,\lambda^{-2} + 0.00101405\,\lambda^{-4} - 3.21646 \times 10^{-5}\,\lambda^{-6} + 5.64314 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.5
TCE 100/300°C (10-6/K) 9.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.851 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.96
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 3
Alkali Resistance —
Phosphate Resistance 2
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BASF2 Schott 1.66446 35.829357
BAFD2 Hoya 1.664457 35.887705
BASF2 Sumita 1.66446 35.9
N-BASF2 Schott 1.66446 36.0
H-ZBAF4 CDGM 1.66426 35.484251
BASF56 Schott 1.657149 36.735021
K-PG395 Sumita 1.658 36.9
K-PSFn166 Sumita 1.663 34.4
K-PSFn166(M) Sumita 1.65858 34.4
K-PG395(M) Sumita 1.65296 36.8
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
BPH40 Ohara 1.676498 37.537388
S-NBH52 Ohara 1.672999 38.14817
S-NBH52V Ohara 1.673 38.256077
S-TIM39 Ohara 1.6668 33.054985
PBM39 Ohara 1.666799 33.046816
PBM22 Ohara 1.647689 33.802937
S-TIM22 Ohara 1.647689 33.792803
S-BAH32 Ohara 1.669979 39.271035
BAH32 Ohara 1.669979 39.279752
PBM27 Ohara 1.639799 34.477127
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