M-NBFD13 by Hoya

Obsolete Unknown Precision Molding Environmentally Friendly

M-NBFD13 by Hoya is an obsolete optical glass. It transmits from 0.34 to 0.70 µm with an nd of 1.8061 and a Vd of 40.740652. It has average chemical resistance and precision molding compatibility.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.25–1.55 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.25–1.55 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.340–0.700 µm
Optical Properties
Refractive Index (nd) 1.8061
Abbe Number (Vd) 40.740652
Dispersion Formula Schott
Wavelength Range 0.25 — 1.55 µm
$$n(\lambda) = \sqrt{3.169 - 0.012068\,\lambda^2 + 0.0319767\,\lambda^{-2} + 0.000385523\,\lambda^{-4} + 5.37198 \times 10^{-5}\,\lambda^{-6} - 3.53563 \times 10^{-9}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 77.0
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.55
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 4
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
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 Compare
NBFD13 Hoya 1.8061 40.73
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
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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