BAH27 by Ohara

Obsolete Unknown Environmentally Dangerous
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: 0.420–0.900 µm
Optical Properties
Refractive Index (nd) 1.701536
Abbe Number (Vd) 41.242277
Dispersion Formula Schott
Wavelength Range 0.365 — 0.9 µm
$$n(\lambda) = \sqrt{2.82315 - 0.0109086\,\lambda^2 + 0.023749\,\lambda^{-2} + 0.000901646\,\lambda^{-4} - 3.71317 \times 10^{-5}\,\lambda^{-6} + 5.48189 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.5
TCE 100/300°C (10-6/K) 8.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.1987 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.02
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
BAFD7 Hoya 1.70154 41.15
H-ZBAF20 CDGM 1.70154 41.148468
D01-41 Corning 1.701805 41.110216
BASF7 Sumita 1.70154 41.1
BASF52 Schott 1.70181 41.010234
BAFD15 Hoya 1.701999 40.195943
BASF64A Schott 1.704 39.384429
N-BASF64 Schott 1.704 39.38
LAFL4 Hoya 1.712704 43.295113
ADF8 Hoya 1.686498 42.863902
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-BAH27 Ohara 1.701536 41.23944
BAH77 Ohara 1.701539 41.21001
BAH71 Ohara 1.701998 40.097173
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
S-LAM52 Ohara 1.72 43.689812
LAM52 Ohara 1.72 43.705625
L-LAM69 Ohara 1.73077 40.508156
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