BAH71 by Ohara

Obsolete Unknown Environmentally Dangerous
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: 0.350–0.700 µm
Optical Properties
Refractive Index (nd) 1.701998
Abbe Number (Vd) 40.097173
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.82192 - 0.0099183\,\lambda^2 + 0.0243939\,\lambda^{-2} + 0.000996519\,\lambda^{-4} - 4.5522 \times 10^{-5}\,\lambda^{-6} + 5.55128 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.4
TCE 100/300°C (10-6/K) 8.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[6.002 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.97
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 4
Alkali Resistance —
Phosphate Resistance 2
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
BAFD15 Hoya 1.701999 40.195943
BASF64A Schott 1.704 39.384429
N-BASF64 Schott 1.704 39.38
BASF52 Schott 1.70181 41.010234
BASF7 Sumita 1.70154 41.1
D01-41 Corning 1.701805 41.110216
H-ZBAF20 CDGM 1.70154 41.148468
BAFD7 Hoya 1.70154 41.15
BASF13 Schott 1.69761 38.570097
K-ZnSF8(M) Sumita 1.71143 38.9
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
BAH77 Ohara 1.701539 41.21001
S-BAH27 Ohara 1.701536 41.23944
BAH27 Ohara 1.701536 41.242277
BAH54 Ohara 1.695 42.167111
S-BAH54 Ohara 1.695 42.167111
S-LAM58 Ohara 1.72 41.978463
LAM58 Ohara 1.72 41.989859
BAH78 Ohara 1.723421 38.03427
S-BAH28 Ohara 1.72342 37.955602
BAH28 Ohara 1.72342 37.949115
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