E-FD1L by Hoya

Preferred Very Common Environmentally Friendly

E-FD1L by Hoya is a preferred optical glass with a very common melt frequency. It transmits from 0.37 to 2.50 µm with an nd of 1.71736 and a Vd of 29.5. It has medium thermal expansion (CTE of 9.1×10⁻⁶/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: 0.370–2.500 µm
Optical Properties
Refractive Index (nd) 1.71736
Abbe Number (Vd) 29.5
Dispersion Formula Schott
Wavelength Range 0.36501 — 1.5296 µm
$$n(\lambda) = \sqrt{2.84965 - 0.0126625\,\lambda^2 + 0.0301969\,\lambda^{-2} + 0.0023493\,\lambda^{-4} - 0.000192165\,\lambda^{-6} + 2.19469 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 9.1
TCE 100/300°C (10-6/K) 10.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.04 \times 10^{-6} + 2(1.26 \times 10^{-8})\,\Delta T + 3(-4.19 \times 10^{-11})\,\Delta T^2 + \frac{9.51 \times 10^{-7} + 2(1.07 \times 10^{-9})\,\Delta T}{\lambda - 0.274}\right] \Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.05
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
K-SFLD1 Sumita 1.71736 29.5
SF1 Sumita 1.71736 29.5
H-ZF3 CDGM 1.71736 29.49911
D17-29 Corning 1.717409 29.492751
SF1 Schott 1.71736 29.51
ZF3 CDGM 1.717365 29.510385
PBH1 Ohara 1.717362 29.513538
S-TIH1 Ohara 1.717362 29.518091
N-SF1 Schott 1.71736 29.62
K-CD120(M) Sumita 1.71466 29.6
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
E-FD1 Hoya 1.71736 29.5
FD1 Hoya 1.71736 29.50028
FD20 Hoya 1.720225 29.300359
FD18 Hoya 1.721507 29.243436
FDS2 Hoya 1.7283 28.674457
E-FD10 Hoya 1.72825 28.32
E-FD10L Hoya 1.72825 28.32
FD10 Hoya 1.728252 28.319563
E-FD15 Hoya 1.69895 30.05
E-FD15L Hoya 1.69895 30.05
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