E-FDS3-W by Hoya

Preferred Very Common Environmentally Friendly

E-FDS3-W by Hoya is a preferred optical glass with a very common melt frequency. It transmits from 0.42 to 2.50 µm with an nd of 2.1042 and a Vd of 17.02. It has medium thermal expansion (CTE of 6.8×10⁻⁶/K) and excellent chemical resistance.

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: 0.420–2.500 µm
Optical Properties
Refractive Index (nd) 2.1042
Abbe Number (Vd) 17.02
Dispersion Formula Schott
Wavelength Range 0.36501 — 1.5296 µm
$$n(\lambda) = \sqrt{4.11204 - 0.0182277\,\lambda^2 + 0.0898521\,\lambda^{-2} + 0.00787144\,\lambda^{-4} - 0.00052228\,\lambda^{-6} + 0.000117731\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.8
TCE 100/300°C (10-6/K) 8.2
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.98 \times 10^{-6} + 2(1.44 \times 10^{-8})\,\Delta T + 3(-3.95 \times 10^{-11})\,\Delta T^2 + \frac{2.17 \times 10^{-6} + 2(2.05 \times 10^{-9})\,\Delta T}{\lambda - 0.302}\right] \Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
Density (g/cm³) 5.63
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 1
Alkali Resistance —
Phosphate Resistance —
Notes

Recommended glass type

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
L-BBH1 Ohara 2.101949 16.785097
L-BBH2 Ohara 2.102999 18.051064
K-PSFn214(M) Sumita 2.13909 17.7
K-PSFn214P(M) Sumita 2.13919 17.7
K-PSFn173(M) Sumita 2.14342 17.3
K-PSFn214 Sumita 2.14355 17.8
K-PSFn214P Sumita 2.144 17.8
K-PSFn173 Sumita 2.1478 17.3
K-PSFn215 Sumita 2.154 17.2
K-PSFn202P Sumita 2.0216 21.4
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
E-FDS3 Hoya 2.1042 17.02
TAFD75-W Hoya 2.102 23.39
TAFD65 Hoya 2.0509 26.94
E-FDS2 Hoya 2.00272 19.32
MC-FDS2 Hoya 2.00178 19.32
MP-FDS2 Hoya 2.00178 19.32
M-FDS2 Hoya 2.00178 19.32
TAFD43 Hoya 2.002944 23.512743
FDS165-W Hoya 1.98611 17.25
FDS16-W Hoya 1.98612 16.48
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