TAFD9 by Hoya

Obsolete Unknown Environmentally Dangerous

TAFD9 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.850299 and a Vd of 32.181026. 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) 1.850299
Abbe Number (Vd) 32.181026
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{3.30539 - 0.0157101\,\lambda^2 + 0.0367077\,\lambda^{-2} + 0.00236582\,\lambda^{-4} - 0.000155819\,\lambda^{-6} + 1.77229 \times 10^{-5}\,\lambda^{-8}}$$
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
LASFN9 Schott 1.85025 32.17
N-LASF9HT Schott 1.85025 32.17
N-LASF9 Schott 1.85025 32.17
H-ZLAF71AGT CDGM 1.85026 32.216801
S-LAH71 Ohara 1.850259 32.27012
LAH71 Ohara 1.850259 32.28594
H-ZLAF71 CDGM 1.85026 32.297288
K-LaSFn21 Sumita 1.85 32.4
LASFN21 Sumita 1.85 32.4
IRG3 Generic IR 1.844836 32.330322
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
NBFD30 Hoya 1.85883 30.0
TAFD13 Hoya 1.855396 36.557002
M-NBFD83 Hoya 1.820268 29.696286
NBFD40 Hoya 1.829 36.496616
MP-NBFD10-20 Hoya 1.83461 37.29
M-NBFD10 Hoya 1.83441 37.29
NBFD10 Hoya 1.834 37.34
NBFD15 Hoya 1.8061 33.27
NBFD15-W Hoya 1.8061 33.27
MC-TAFD317 Hoya 1.8812 37.17
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