M-NBFD82 by Hoya

Obsolete Unknown Precision Molding Environmentally Friendly

M-NBFD82 by Hoya is an obsolete optical glass. It transmits from 0.35 to 0.70 µm with an nd of 1.814741 and a Vd of 37.027807. It has low thermal expansion (CTE of 5.9×10⁻⁶/K), 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: 0.350–0.700 µm
Optical Properties
Refractive Index (nd) 1.814741
Abbe Number (Vd) 37.027807
Dispersion Formula Schott
Wavelength Range 0.25 — 1.55 µm
$$n(\lambda) = \sqrt{3.18803 - 0.0121784\,\lambda^2 + 0.0371931\,\lambda^{-2} - 0.000281753\,\lambda^{-4} + 0.000180448\,\lambda^{-6} - 4.18291 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.9
TCE 100/300°C (10-6/K) 77.0
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[7.08391 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.34
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance 1
Acid Resistance 4
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
LASF14A Schott 1.822226 37.454652
S-LAH60 Ohara 1.834 37.160487
LAH60 Ohara 1.834 37.166863
S-LAH60MQ Ohara 1.833999 37.172099
LASFN14 Sumita 1.834 37.2
S-LAH60V Ohara 1.833999 37.206855
H-ZLAF53BGT CDGM 1.834 37.210555
H-ZLAF53B CDGM 1.834 37.210555
K-LaSFn14 Sumita 1.834 37.3
N-LASF40 Schott 1.83404 37.3
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
NBFD8 Hoya 1.807401 35.542096
NBFD40 Hoya 1.829 36.496616
NBFD10 Hoya 1.834 37.34
M-NBFD10 Hoya 1.83441 37.29
MP-NBFD10-20 Hoya 1.83461 37.29
NBFD3 Hoya 1.8045 39.64
MC-NBFD130 Hoya 1.8061 40.73
MC-NBFD130L Hoya 1.8061 40.73
M-NBFD130 Hoya 1.8061 40.73
NBFD13 Hoya 1.8061 40.73
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