NBFD13 by Hoya

Preferred Very Common Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.36501–1.5296 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.36501–1.5296 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.340–1.550 µm
Optical Properties
Refractive Index (nd) 1.8061
Abbe Number (Vd) 40.73
Dispersion Formula Schott
Wavelength Range 0.36501 — 1.5296 µm
$$n(\lambda) = \sqrt{3.17292 - 0.0142485\,\lambda^2 + 0.0291681\,\lambda^{-2} + 0.00134288\,\lambda^{-4} - 9.61788 \times 10^{-5}\,\lambda^{-6} + 8.40426 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.7
TCE 100/300°C (10-6/K) 7.2
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[6.67424 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.38
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance 2
Acid Resistance 3
Alkali Resistance —
Phosphate Resistance —
Notes

Recommended glass type

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
K-LaSFn1 Sumita 1.8061 40.7
LASFN1 Sumita 1.806 40.7
N-LASF43 Schott 1.8061 40.61
P-LASF47 Schott 1.8061 40.9
K-VC89(M) Sumita 1.8059 40.9
L-LAH53 Ohara 1.806249 40.907302
S-LAH53 Ohara 1.806098 40.925996
S-LAH53V Ohara 1.806099 40.929791
H-ZLAF52 CDGM 1.806099 40.945389
LAH53 Ohara 1.806098 40.948508
Similar Glasses (Hoya)
Glass Manufacturer nd Vd
MC-NBFD130L Hoya 1.8061 40.73
MC-NBFD130 Hoya 1.8061 40.73
MP-NBFD130 Hoya 1.8061 40.73
M-NBFD130 Hoya 1.8061 40.73
M-NBFD13 Hoya 1.8061 40.740652
MC-NBFD135 Hoya 1.80834 40.92
NBFD3 Hoya 1.8045 39.64
NBFD2 Hoya 1.797199 41.143795
NBFD12 Hoya 1.7995 42.34
M-TAFD51 Hoya 1.8208 42.71
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