TAF5 by Hoya

Special Very Rare 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: 0.300–0.700 µm
Optical Properties
Refractive Index (nd) 1.816
Abbe Number (Vd) 46.57
Dispersion Formula Schott
Wavelength Range 0.36501 — 1.5296 µm
$$n(\lambda) = \sqrt{3.21916 - 0.0153106\,\lambda^2 + 0.0263626\,\lambda^{-2} + 0.00105345\,\lambda^{-4} - 6.16604 \times 10^{-5}\,\lambda^{-6} + 3.97339 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.3
TCE 100/300°C (10-6/K) 7.7
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.56416 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
Density (g/cm³) 5.06
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

Not in a position to accept new order because of discontinuation.

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Glass Manufacturer nd Vd
H-ZLAF69A CDGM 1.816 46.556066
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LAH59 Ohara 1.816 46.626446
K-LaSFn9 Sumita 1.816 46.7
LASFN9 Sumita 1.816 46.7
N-LASF44 Schott 1.8042 46.5
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H-ZLAF50E CDGM 1.804 46.574487
H-ZLAF50D CDGM 1.804 46.575016
Similar Glasses (Hoya)
Glass Manufacturer nd Vd
TAF3D Hoya 1.8042 46.5
TAF3 Hoya 1.8042 46.5
TAFD10 Hoya 1.815502 44.5379
MC-TAF31-15 Hoya 1.80154 45.47
MP-TAF31-15 Hoya 1.80154 45.47
M-TAF31 Hoya 1.80139 45.45
NBFD14 Hoya 1.801699 44.321602
TAF2 Hoya 1.7945 45.39
TAF48 Hoya 1.79091 48.09
TAF4 Hoya 1.788 47.49
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