PBH18 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: 0.340–1.000 µm
Optical Properties
Refractive Index (nd) 1.721506
Abbe Number (Vd) 29.243262
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.85932 - 0.01021\,\lambda^2 + 0.0319732\,\lambda^{-2} + 0.00202069\,\lambda^{-4} - 0.000113993\,\lambda^{-6} + 1.40129 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.3
TCE 100/300°C (10-6/K) 9.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.07 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.5
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
FD18 Hoya 1.721507 29.243436
SF18 Schott 1.72151 29.245495
SF18 Sumita 1.72151 29.3
P-SF69 Schott 1.7225 29.23
CD120 Sumita 1.7225 29.2
K-CD120 Sumita 1.7225 29.2
FD20 Hoya 1.720225 29.300359
SFN1 Sumita 1.72022 29.3
D17-29 Corning 1.717409 29.492751
H-ZF3 CDGM 1.71736 29.49911
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-TIH18 Ohara 1.721507 29.23233
PBH1 Ohara 1.717362 29.513538
S-TIH1 Ohara 1.717362 29.518091
PBH10 Ohara 1.728249 28.4623
S-TIH10 Ohara 1.72825 28.460599
S-TIH20 Ohara 1.70585 30.244176
S-TIH3 Ohara 1.739998 28.296005
PBH3W Ohara 1.739998 28.287409
PBH3 Ohara 1.739998 28.283809
PBH13W Ohara 1.740769 27.793228
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