NBFD5 by Hoya

Obsolete Unknown Environmentally Dangerous

NBFD5 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.762001 and a Vd of 40.263213. It has dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.762001
Abbe Number (Vd) 40.263213
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{3.02177 - 0.0116417\,\lambda^2 + 0.0267138\,\lambda^{-2} + 0.00127669\,\lambda^{-4} - 6.7665 \times 10^{-5}\,\lambda^{-6} + 6.40368 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) —
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 Compare
H-LAF55 CDGM 1.762 40.105472
LAM55 Ohara 1.762001 40.100947
S-LAM55 Ohara 1.762001 40.100176
LAFN9 Sumita 1.764 40.3
H-LAFL5 CDGM 1.75367 37.491665
LAF13 Schott 1.775507 37.836043
K-GIR140 Sumita 1.75106 43.1
LAFN8 Schott 1.735197 41.590899
LAF22A Schott 1.781791 37.196288
H-LAF7 CDGM 1.78179 37.092107
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
NBFD6 Hoya 1.756702 36.345258
MP-LAF81 Hoya 1.73077 40.5
M-LAF81 Hoya 1.73077 40.5
NBFD1 Hoya 1.789004 42.757634
NBFD2 Hoya 1.797199 41.143795
NBFD11 Hoya 1.7859 43.94
NBFD7 Hoya 1.782999 36.06621
LAF20 Hoya 1.744 44.872914
LAF2 Hoya 1.744 44.9
LAF7 Hoya 1.749497 35.042695
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